PHP4中session的应用实例（1）－－登录页面（login.php3)

时间：2007-02-17 来源：PHP爱好者

PHP4中session的应用实例（1）－－登录页面（login.php3) 
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关键词：PHP 
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<?php 
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//这个脚本是用来给用户输入口令，并判断口令是否正确的。 
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//如果正确则转到欢迎页面。 
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if ($login){ 
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include("../include/config.inc.php3"); 
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session_start(); 
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$right_enter='0'; 
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$query="select * from user_define where user_login='$user_login' and user_pass=password('$user_pass')"; 
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$result=@mysql_query($query,$dbconnect); 
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if ($user_array=@mysql_fetch_array($result)){ 
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$user_id=$user_array[user_id]; 
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$user_name=$user_array[user_info]; 
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session_register("user_id"); 
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session_register("user_name"); 
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session_register("user_array"); 
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if(($user_array[ticket_day]) and ($user_array[ticket_num])){ 
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$right_enter='1'; 
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} 
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else{ 
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$error_message="对不起，您没有订票的权限！"; 
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} 
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} 
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else{ 
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$error_message="错误！用户名错，或口令错。请重新输入。"; 
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} 
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$log_time=date("Y-m-d H:i:s"); 
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$query="insert into log_record (log_time,user_login,remote_addr,right_enter,enter_function) values ('$log_time','$user_login','$REMOTE_ADDR','$right_enter','1')"; 
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@mysql_query($query,$dbconnect); 
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if($right_enter){ 
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Header("Location: welcome_reserve.php3"); 
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exit; 
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} 
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} 
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if($logout){ 
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session_start(); 
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session_unregister("user_id"); 
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session_unregister("user_name"); 
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session_unregister("user_array"); 
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} 
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?> 
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
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<html> 
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<head> 
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<title>用户登录</title> 
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<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
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<link rel="stylesheet" type="text/css" href="../include/njz_common.css"> 
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</head><body> 
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<form name="form1" method="post" action="<?php echo $PHP_SELF; ?>" > 
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<table width="289" border="1" cellspacing="0" cellpadding="1" bordercolor="#999999" align="center"> 
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<tr bgcolor="#999999"> 
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<td> 
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<div align="center">用户登录</div> 
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</td> 
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</tr> 
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<tr> 
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<td> 
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<table width="267" border="0" cellspacing="0" cellpadding="5" align="center"> 
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<tr> 
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<td width="94"> 
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<div align="right">用户：</div> 
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</td> 
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<td width="169"> 
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<input type="text" name="user_login" size="16" maxlength="16" value="<?php echo $user_login; ?>"> 
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</td> 
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</tr> 
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<tr> 
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<td width="94"> 
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<div align="right">口令：</div> 
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</td> 
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<td width="169"> 
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<input type="password" name="user_pass" size="16" maxlength="16"> 
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</td> 
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</tr> 
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<tr> 
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<td colspan="2"> 
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<div align="center"> 
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<input type="submit" name="login" value=" 登录 "> 
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<input type="button" name="return_index" value="返回首页" onClick="form1.action='../include/goto_page.php3?dist_page=../main.php3';form1.submit();return;"> 
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</div> 
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</td> 
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</tr> 
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</table> 
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</td> 
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</tr> 
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</table> 
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</form> 
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<?php 
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if($error_message) echo "<center>$error_message</center>"; 
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?> 
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<script language="Javascript">document.form1.user_login.focus(); 
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</script> 
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<?php include("../footer.php3"); ?> 
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</body> 
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</html> 
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