为php3增加session的功能
时间：2007-02-17 来源：PHP爱好者
php3中没有session的功能，以下是一个php4的backport，能为php3提供session
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的管理。资料来源：http://www.phpwizard.net/phpChat。既然斑竹赞成直接
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贴源码，我就把它贴出来吧。:-)
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file: sessions.php3
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-----------------------------------------------------
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<?
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/*********************************************************************
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********
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*
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*
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* Web Application Development with PHP
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*
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* by
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*
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* Tobias Ratschiller and Till Gerken
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*
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*
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*
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* Copyright (c) 2000, New Riders Publishing
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*
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*
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*
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*********************************************************************
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********
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*
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*
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* $Title: PHP 3 implementation of PHP 4's session management API $
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*
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* $Chapter: Web Application Concepts $
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*
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* $Executable: false $
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*
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*
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*
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* $Description:
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*
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* This is a backport of the PHP 4 session_* functions to native PHP -
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so *
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* that you can use the same session management functions under both
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*
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* versions of PHP. They're believed to be about 75% compatible at the
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*
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* moment, but it's already possible to use the most common stuff. $
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*
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*
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*
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*********************************************************************
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********/
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/*
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* Differences from PHP 4:
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* - no URL rewriting (of course)
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* - options aren't specified in the php.ini but in the session c
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lass below
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* - auto_start doesn't work with user callbacks
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* - the session ID is produced by a different algorithm
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* - shared memory support is still missing
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* - <?=SID?> doesn't work - use <?print($SID);?>
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* - the WDDX serializer doesn't work yet.
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* - serializing objects is limited due to PHP 3's serializer()
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*
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* Notes:
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* The session class contains the configuration variables. Th
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is is the
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* only part of the code you should need to edit.
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*
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* To reproduce the module concept used in PHP 4's session li
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brary, we
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* use classes. An example class has been been provided: file
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s. You can
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* easily create your own classes, for example a class mysql
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to store
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* session data to MySQL. It needs to provide the following f
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unctions:
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* bool open(string save_path, string sess_name):
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* used on startup of a session to initialize variables o
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r memory
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* returns false on error or true on success
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* bool close:
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* used on shutdown of a session to unset variables or fr
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ee memory
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* mixed read(string sess_id):
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* reads the session data of the session identified with
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sess_id.
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* returns false on error or the serialized session data
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* bool write(string sess_id, string val):
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* saves the session data of the session identified with
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sess_id
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* returns false on error or true on success
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* bool destroy(string sess_id):
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* destroy the session identified with sess_id
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* returns false on error or true on success
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* bool gc(int max_lifetime):
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* provides garbage collection to remove sessions older t
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han
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* time() - max_lifetime
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* returns false on error or true on success
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*
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* While it may be faster to provide your own class, the reco
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mmended way
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* to add storage modules is to use session_set_save_handler(
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), as this
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* is compatible to PHP 4.
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*/
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$SID = "";
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class session
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{
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// Public variables
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var $auto_start = true;
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var $save_path = "/tmp";
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var $name = "PHPSESSID";
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var $save_handler = "files";
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var $lifetime = 0;
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var $gc_probability = 1;
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var $gc_maxlifetime = 0;
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var $serialize_handler = "php";
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var $extern_referer_check = false;
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var $use_cookies = true;
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var $ID;
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// Private variables
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var $nr_open_sessions = 0;
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var $mod_name = "";
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var $id;
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var $delimiter = "n";
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var $delimiter_value = "[==]";
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function session()
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{
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$this->mod_name = $this->save_handler;
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}
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}
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class user
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{
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var $open_func;
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var $close_func;
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var $read_func;
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var $write_func;
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var $destroy_func;
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var $gc_func;
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function open($save_path, $sess_name)
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{
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$func = $this->open_func;
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if(function_exists($func))
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{
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return($func($save_path, $sess_name));
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}
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return(true);
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}
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function close($save_path, $sess_name)
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{
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$func = $this->close_func;
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if(function_exists($func))
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{
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return($func());
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}
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return(true);
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}
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function read($sess_id)
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{
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$func = $this->read_func;
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return($func($sess_id));
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}
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function write($sess_id, $val)
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{
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$func = $this->write_func;
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return($func($sess_id, $val));
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}
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function destroy($sess_id)
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{
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$func = $this->destroy_func;
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if(function_exists($func))
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{
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return($func($sess_id));
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}
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return(true);
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}
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function gc($max_lifteime)
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{
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$func = $this->gc_func;
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if(function_exists($func))
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{
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return($func($max_lifetime));
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}
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return(true);
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}
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}
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class files
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{
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function open($save_path, $sess_name)
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{
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return(true);
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function close()
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{
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return(true);
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function read($sess_id)
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{
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global $session;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
// Open, read in, close file with session data
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$file = $session->save_path."/sess$sess_id";
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if (!file_exists($file))
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{
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// Create it
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touch($file);
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}
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$fp = fopen($file, "r") or die("Could not open session file ($
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file).");
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$val = fread($fp, filesize($file));
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fclose($fp);
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return($val);
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}
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function write($sess_id, $val)
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{
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global $session;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
// Open, write to, close file with session data
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$file = $session->save_path."/sess$sess_id";
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$fp = fopen($file, "w") or die("Could not write session file (
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$file)");
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$val = fputs($fp, $val);
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fclose($fp);
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return(true);
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}
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function destroy($sess_id)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$file = $session->save_path."/sess$sess_id";
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unlink($file);
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return(true);
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}
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function gc($max_lifetime)
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{
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// We return true, since all cleanup should be handled by
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// an external entity (i.e. find -ctime x | xargs rm)
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return(true);
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}
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}
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function _session_create_id()
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{
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return(md5(uniqid(microtime())));
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}
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function _php_encode()
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$ret = "";
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// Create a string containing the serialized variables
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for ($i=0; $i<count($session->vars); $i++)
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{
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$ret .= $session->vars[$i].$session->delimiter_value.serialize
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($GLOBALS[$session->vars[$i]]).$session->delimiter;
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}
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return($ret);
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}
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function _php_decode($data)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$data = trim($data);
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$vars = explode($session->delimiter, $data);
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// Add the variables to the global namespace
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for ($i=0; $i<count($vars); $i++)
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{
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$tmp = explode($session->delimiter_value, $vars[$i]);
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$name = trim($tmp[0]);
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$value = trim($tmp[1]);
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$GLOBALS[$name] = unserialize($value);
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}
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}
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function _wddx_encode($data)
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{
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global $session;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
$ret = wddx_serialize_vars($session->vars);
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return($ret);
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}
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function _wddx_decode($data)
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{
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return(wddx_deserialize($data));
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}
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function session_name($name = "")
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{
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global $session;
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if(empty($name))
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{
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return($session->name);
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}
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$session->name = $name;
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}
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function session_set_save_handler($open, $close, $read, $write, $destr
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
oy, $gc)
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{
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global $session, $user;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
$user = new user;
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$user->open_func = $open;
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$user->close_func = $close;
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$user->read_func = $read;
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$user->write_func = $write;
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$user->destroy_func = $destroy;
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$user->gc_func = $gc;
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$session->mod_name = "user";
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}
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function session_module_name($name = "")
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{
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global $session;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
if(empty($name))
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{
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return($session->mod_name);
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}
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$session->mod_name = $name;
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}
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function session_save_path($path = "")
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{
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global $session;
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if(empty($path))
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{
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return($session->save_path);
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}
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$session->save_path = $path;
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}
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function session_id($id = "")
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{
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global $session;
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if(empty($id))
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{
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return($session->id);
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}
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$session->id = $id;
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function session_register($var)
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{
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global $session;
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if ($session->nr_open_sessions == 0)
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{
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session_start();
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}
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$session->vars[] = trim($var);
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}
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function session_unregister($var)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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for ($i=0; $i<count($session->vars); $i++)
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{
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if ($session->vars[$i] == trim($var))
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{
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unset($session->vars[$i]);
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break;
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}
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}
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function session_is_registered($var)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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for ($i=0; $i<count($session->vars); $i++)
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{
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
if ($session->vars[$i] == trim($var))
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{
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return(true);
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}
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
return(false);
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function session_encode()
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$serializer = "_".$session->serialize_handler."_encode";
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$ret = $serializer();
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
return($ret);
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}
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function session_decode($data)
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{
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global $session;
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$serializer = "_".$session->serialize_handler."_decode";
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$ret = $serializer($data);
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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return($ret);
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}
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function session_start()
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{
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global $session, $SID, $HTTP_COOKIE_VARS;
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// Define the global variable $SID?
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$define_sid = true;
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// Check if session_start() has been called once already
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if ($session->nr_open_sessions != 0)
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{
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return(false);
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}
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// Try to get the session ID
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if (empty($GLOBALS[$session->name]))
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{
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// Maybe it is encoded into the URL (form <session-name>=<sess
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ion-id>?
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eregi($session->name."=([^/]+)", $GLOBALS["REQUEST_URI"], $reg
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s);
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$regs[1] = trim($regs[1]);
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if (!empty($regs[1]))
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{
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$session->id = $regs[1];
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}
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}
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else
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{
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$session->id = $GLOBALS[$session->name];
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if (isset($HTTP_COOKIE_VARS[$session->name]))
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{
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$define_sid = false;
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}
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}
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// Check for external referer
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if ($session->extern_referer_check)
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{
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$url = parse_url($GLOBALS["HTTP_REFERER"]);
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if(trim($url["host"]) != $GLOBALS["SERVER_NAME"])
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{
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unset($session->id);
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$define_sid = true;
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}
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}
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$mod = $GLOBALS[$session->mod_name];
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// Do we have an existing session ID?
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if (!empty($session->id))
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{
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// Start session
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if (!$mod->open($session->save_path, $session->name))
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{
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die("Failed to initialize session module.");
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}
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// Read session data
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if ($val = $mod->read($session->id))
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{
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// Decode session data
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session_decode($val);
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}
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}
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else
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{
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// Create new session ID
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$session->id = _session_create_id();
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// Store cookie with this session ID?
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if ($session>use_cookies)
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{
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SetCookie($session->name, $session->id, $session->lifetime
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);
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}
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}
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// Check if we should clean up (call the garbage collection routin
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es)
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if ($session->gc_probability > 0)
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{
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srand(time());
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$randmax = getrandmax();
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$nrand = (int)(100 * rand() / $randmax);
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if($nrand <$session->gc_probability)
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{
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$mod->gc($session->gc_maxlifetime);
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}
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}
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if($define_sid)
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{
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$SID = $session->name."=".$session->id;
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}
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$session->nr_open_sessions++;
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return(true);
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}
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function session_destroy()
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{
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global $session;
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if($session->nr_open_sessions == 0)
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{
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return(false);
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}
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// Destroy session
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$mod = $GLOBALS[$session->mod_name];
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if (!$mod->destroy($session->name))
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{
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return(false);
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}
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unset($session);
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$session = new session;
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return(true);
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}
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function session_close()
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{
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global $session, $SID;
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if($session->nr_open_sessions == 0)
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{
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return(false);
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}
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// Encode session
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$val = session_encode();
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$len = strlen($val);
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// Save session
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$mod = $GLOBALS[$session->mod_name];
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if (!$mod->write($session->id, $val))
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{
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die("Session could not be saved.");
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}
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// Close session
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if (function_exists($session->mod_name."->close") &&!$mod->close()
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)
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{
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die("Session could not be closed.");
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}
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$SID = "";
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$session->nr_open_sessions--;
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return(true);
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}
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$session = new session;
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$mod = $session->save_handler;
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$$mod = new $mod;
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if ($session->auto_start)
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{
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$ret = session_start() or die("Session could not be started.");
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}
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register_shutdown_function("session_close");
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/*
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* Basic Example
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*
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* This basic example shows the normal use. The code is the same
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as in
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* PHP 4, except for the require("sessions.php3");
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require("sessions.php3");
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session_start();
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print("Our session ID is: ".session_id()."<br>");
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print("The counter value is: $counter<br>");
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print("The foo value is: $foo<br>");
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$counter++;
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$foo = "Foobar=Fobar";
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session_register("counter");
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session_register("foo");
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*
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*/
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
/*
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* User Callback Example
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*
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* This example uses callback functions. It's a slightly modified
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version
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* of Sascha Schumann's original test script for the callbacks. 1
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00%
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* the same code as in PHP 4 (except for the require(), of course
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).
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
require("sessions.php3");
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function my_open($save_path, $sess_name)
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{
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echo $save_path."<br>";
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echo $sess_name."<br>";
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return true;
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}
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function my_read($sess_id)
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{
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echo $sess_id."<br>";
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return true;
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function my_write($sess_id, $val)
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{
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echo $val."<br>";
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return true;
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}
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$foo = 10;
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session_set_save_handler("my_open", "", "my_read", "my_write", "", "")
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;
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session_start();
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session_register("foo");
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echo "foo: $foo";
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*
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*/
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?>
php爱好者站 http://www.ｐｈｐfans.net c/vc/c++/java.
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的管理。资料来源：http://www.phpwizard.net/phpChat。既然斑竹赞成直接
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贴源码，我就把它贴出来吧。:-)
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file: sessions.php3
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-----------------------------------------------------
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<?
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/*********************************************************************
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********
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*
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*
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* Web Application Development with PHP
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*
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* by
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*
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* Tobias Ratschiller and Till Gerken
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*
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*
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*
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* Copyright (c) 2000, New Riders Publishing
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*
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*
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*
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*********************************************************************
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********
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*
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*
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* $Title: PHP 3 implementation of PHP 4's session management API $
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*
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* $Chapter: Web Application Concepts $
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*
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* $Executable: false $
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*
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*
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*
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* $Description:
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*
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* This is a backport of the PHP 4 session_* functions to native PHP -
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so *
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* that you can use the same session management functions under both
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*
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* versions of PHP. They're believed to be about 75% compatible at the
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*
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* moment, but it's already possible to use the most common stuff. $
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*
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*
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*
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*********************************************************************
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********/
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/*
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* Differences from PHP 4:
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* - no URL rewriting (of course)
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* - options aren't specified in the php.ini but in the session c
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lass below
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* - auto_start doesn't work with user callbacks
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* - the session ID is produced by a different algorithm
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* - shared memory support is still missing
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* - <?=SID?> doesn't work - use <?print($SID);?>
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* - the WDDX serializer doesn't work yet.
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* - serializing objects is limited due to PHP 3's serializer()
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*
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* Notes:
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* The session class contains the configuration variables. Th
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is is the
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* only part of the code you should need to edit.
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*
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* To reproduce the module concept used in PHP 4's session li
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brary, we
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* use classes. An example class has been been provided: file
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s. You can
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* easily create your own classes, for example a class mysql
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to store
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* session data to MySQL. It needs to provide the following f
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unctions:
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* bool open(string save_path, string sess_name):
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* used on startup of a session to initialize variables o
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r memory
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* returns false on error or true on success
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* bool close:
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* used on shutdown of a session to unset variables or fr
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ee memory
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* mixed read(string sess_id):
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* reads the session data of the session identified with
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sess_id.
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* returns false on error or the serialized session data
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* bool write(string sess_id, string val):
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* saves the session data of the session identified with
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sess_id
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* returns false on error or true on success
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* bool destroy(string sess_id):
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* destroy the session identified with sess_id
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* returns false on error or true on success
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* bool gc(int max_lifetime):
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* provides garbage collection to remove sessions older t
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han
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* time() - max_lifetime
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* returns false on error or true on success
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*
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* While it may be faster to provide your own class, the reco
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mmended way
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* to add storage modules is to use session_set_save_handler(
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), as this
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* is compatible to PHP 4.
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*/
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$SID = "";
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class session
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{
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// Public variables
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var $auto_start = true;
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var $save_path = "/tmp";
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var $name = "PHPSESSID";
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var $save_handler = "files";
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var $lifetime = 0;
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var $gc_probability = 1;
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var $gc_maxlifetime = 0;
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var $serialize_handler = "php";
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var $extern_referer_check = false;
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var $use_cookies = true;
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var $ID;
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// Private variables
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var $nr_open_sessions = 0;
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var $mod_name = "";
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var $id;
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var $delimiter = "n";
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var $delimiter_value = "[==]";
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function session()
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{
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$this->mod_name = $this->save_handler;
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}
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}
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class user
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{
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var $open_func;
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var $close_func;
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var $read_func;
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var $write_func;
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var $destroy_func;
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var $gc_func;
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function open($save_path, $sess_name)
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{
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$func = $this->open_func;
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if(function_exists($func))
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{
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return($func($save_path, $sess_name));
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}
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return(true);
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}
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function close($save_path, $sess_name)
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{
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$func = $this->close_func;
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if(function_exists($func))
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{
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return($func());
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}
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return(true);
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}
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function read($sess_id)
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{
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$func = $this->read_func;
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return($func($sess_id));
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}
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function write($sess_id, $val)
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{
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$func = $this->write_func;
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return($func($sess_id, $val));
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}
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function destroy($sess_id)
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{
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$func = $this->destroy_func;
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if(function_exists($func))
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{
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return($func($sess_id));
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}
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return(true);
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}
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function gc($max_lifteime)
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{
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$func = $this->gc_func;
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if(function_exists($func))
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{
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return($func($max_lifetime));
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}
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return(true);
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}
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}
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class files
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{
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function open($save_path, $sess_name)
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{
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return(true);
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}
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function close()
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{
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return(true);
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}
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function read($sess_id)
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{
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global $session;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
// Open, read in, close file with session data
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$file = $session->save_path."/sess$sess_id";
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if (!file_exists($file))
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{
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// Create it
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touch($file);
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}
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$fp = fopen($file, "r") or die("Could not open session file ($
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file).");
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$val = fread($fp, filesize($file));
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fclose($fp);
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return($val);
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}
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function write($sess_id, $val)
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{
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global $session;
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// Open, write to, close file with session data
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$file = $session->save_path."/sess$sess_id";
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$fp = fopen($file, "w") or die("Could not write session file (
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$file)");
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$val = fputs($fp, $val);
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fclose($fp);
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return(true);
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}
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function destroy($sess_id)
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{
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global $session;
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$file = $session->save_path."/sess$sess_id";
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unlink($file);
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return(true);
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}
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function gc($max_lifetime)
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{
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// We return true, since all cleanup should be handled by
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// an external entity (i.e. find -ctime x | xargs rm)
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return(true);
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}
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}
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function _session_create_id()
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{
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return(md5(uniqid(microtime())));
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}
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function _php_encode()
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$ret = "";
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// Create a string containing the serialized variables
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for ($i=0; $i<count($session->vars); $i++)
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{
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$ret .= $session->vars[$i].$session->delimiter_value.serialize
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($GLOBALS[$session->vars[$i]]).$session->delimiter;
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}
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return($ret);
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}
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function _php_decode($data)
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{
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global $session;
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$data = trim($data);
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$vars = explode($session->delimiter, $data);
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// Add the variables to the global namespace
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for ($i=0; $i<count($vars); $i++)
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{
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$tmp = explode($session->delimiter_value, $vars[$i]);
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$name = trim($tmp[0]);
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$value = trim($tmp[1]);
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$GLOBALS[$name] = unserialize($value);
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}
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}
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function _wddx_encode($data)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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$ret = wddx_serialize_vars($session->vars);
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return($ret);
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}
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function _wddx_decode($data)
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{
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return(wddx_deserialize($data));
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}
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function session_name($name = "")
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{
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global $session;
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if(empty($name))
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{
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return($session->name);
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}
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$session->name = $name;
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}
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function session_set_save_handler($open, $close, $read, $write, $destr
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oy, $gc)
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{
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global $session, $user;
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
$user = new user;
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$user->open_func = $open;
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$user->close_func = $close;
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$user->read_func = $read;
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$user->write_func = $write;
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$user->destroy_func = $destroy;
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$user->gc_func = $gc;
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$session->mod_name = "user";
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}
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function session_module_name($name = "")
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{
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global $session;
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if(empty($name))
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{
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return($session->mod_name);
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}
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$session->mod_name = $name;
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}
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function session_save_path($path = "")
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{
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global $session;
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if(empty($path))
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{
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return($session->save_path);
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}
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$session->save_path = $path;
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}
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function session_id($id = "")
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{
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global $session;
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if(empty($id))
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{
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return($session->id);
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}
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$session->id = $id;
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}
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
function session_register($var)
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{
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global $session;
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if ($session->nr_open_sessions == 0)
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{
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session_start();
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}
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$session->vars[] = trim($var);
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}
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function session_unregister($var)
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{
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global $session;
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for ($i=0; $i<count($session->vars); $i++)
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{
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if ($session->vars[$i] == trim($var))
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{
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unset($session->vars[$i]);
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break;
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}
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}
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}
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function session_is_registered($var)
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{
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global $session;
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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for ($i=0; $i<count($session->vars); $i++)
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{
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if ($session->vars[$i] == trim($var))
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{
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return(true);
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}
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}
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return(false);
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}
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function session_encode()
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{
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global $session;
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$serializer = "_".$session->serialize_handler."_encode";
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$ret = $serializer();
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return($ret);
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}
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function session_decode($data)
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{
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global $session;
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$serializer = "_".$session->serialize_handler."_decode";
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$ret = $serializer($data);
www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
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return($ret);
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}
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function session_start()
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{
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global $session, $SID, $HTTP_COOKIE_VARS;
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// Define the global variable $SID?
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$define_sid = true;
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// Check if session_start() has been called once already
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if ($session->nr_open_sessions != 0)
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{
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return(false);
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}
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// Try to get the session ID
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if (empty($GLOBALS[$session->name]))
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{
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// Maybe it is encoded into the URL (form <session-name>=<sess
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ion-id>?
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eregi($session->name."=([^/]+)", $GLOBALS["REQUEST_URI"], $reg
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s);
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$regs[1] = trim($regs[1]);
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if (!empty($regs[1]))
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{
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$session->id = $regs[1];
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}
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}
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else
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{
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$session->id = $GLOBALS[$session->name];
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if (isset($HTTP_COOKIE_VARS[$session->name]))
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{
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$define_sid = false;
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}
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}
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// Check for external referer
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if ($session->extern_referer_check)
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{
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$url = parse_url($GLOBALS["HTTP_REFERER"]);
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if(trim($url["host"]) != $GLOBALS["SERVER_NAME"])
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{
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unset($session->id);
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$define_sid = true;
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}
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}
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$mod = $GLOBALS[$session->mod_name];
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// Do we have an existing session ID?
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if (!empty($session->id))
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{
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// Start session
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if (!$mod->open($session->save_path, $session->name))
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{
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die("Failed to initialize session module.");
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}
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// Read session data
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if ($val = $mod->read($session->id))
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{
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// Decode session data
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session_decode($val);
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}
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}
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else
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{
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// Create new session ID
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$session->id = _session_create_id();
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// Store cookie with this session ID?
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if ($session>use_cookies)
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{
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SetCookie($session->name, $session->id, $session->lifetime
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);
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}
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}
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// Check if we should clean up (call the garbage collection routin
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es)
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if ($session->gc_probability > 0)
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{
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srand(time());
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$randmax = getrandmax();
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$nrand = (int)(100 * rand() / $randmax);
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if($nrand <$session->gc_probability)
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{
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$mod->gc($session->gc_maxlifetime);
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}
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}
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if($define_sid)
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{
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$SID = $session->name."=".$session->id;
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}
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$session->nr_open_sessions++;
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return(true);
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}
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function session_destroy()
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{
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global $session;
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if($session->nr_open_sessions == 0)
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{
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return(false);
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}
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// Destroy session
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$mod = $GLOBALS[$session->mod_name];
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if (!$mod->destroy($session->name))
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{
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return(false);
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}
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unset($session);
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$session = new session;
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return(true);
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}
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function session_close()
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{
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global $session, $SID;
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if($session->nr_open_sessions == 0)
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{
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return(false);
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}
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// Encode session
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$val = session_encode();
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$len = strlen($val);
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// Save session
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$mod = $GLOBALS[$session->mod_name];
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if (!$mod->write($session->id, $val))
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{
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die("Session could not be saved.");
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}
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// Close session
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if (function_exists($session->mod_name."->close") &&!$mod->close()
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)
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{
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die("Session could not be closed.");
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}
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$SID = "";
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$session->nr_open_sessions--;
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return(true);
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}
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$session = new session;
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$mod = $session->save_handler;
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$$mod = new $mod;
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if ($session->auto_start)
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{
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$ret = session_start() or die("Session could not be started.");
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}
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register_shutdown_function("session_close");
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/*
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* Basic Example
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*
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* This basic example shows the normal use. The code is the same
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as in
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* PHP 4, except for the require("sessions.php3");
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require("sessions.php3");
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session_start();
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print("Our session ID is: ".session_id()."<br>");
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print("The counter value is: $counter<br>");
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print("The foo value is: $foo<br>");
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$counter++;
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$foo = "Foobar=Fobar";
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session_register("counter");
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session_register("foo");
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*
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*/
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/*
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* User Callback Example
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*
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* This example uses callback functions. It's a slightly modified
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version
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* of Sascha Schumann's original test script for the callbacks. 1
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00%
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* the same code as in PHP 4 (except for the require(), of course
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).
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www.chinaitp ower .comYOI1OmhX7BvcrIs8LziDVRbxR
require("sessions.php3");
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function my_open($save_path, $sess_name)
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{
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echo $save_path."<br>";
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echo $sess_name."<br>";
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return true;
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}
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function my_read($sess_id)
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{
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echo $sess_id."<br>";
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return true;
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}
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function my_write($sess_id, $val)
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{
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echo $val."<br>";
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return true;
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}
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$foo = 10;
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session_set_save_handler("my_open", "", "my_read", "my_write", "", "")
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;
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session_start();
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session_register("foo");
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echo "foo: $foo";
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*
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*/
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?>
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