php文本站内全文检索

<?php  
/****************************************************   
原作者: uchinaboy    
修改：lingshidao
特点：无需mysql支持；速度快；无需设置路径，放在哪级目录下，就搜索该目录和子目录；可以搜索一切文本类型的文件；显示文件相关内容；关键词自动高亮显示。
修改内容：增加了自动分页和风格设置文件。
搜索框代码（如果放在search.php相同目录下，无需修改）：<form method="post" action="search.php"><input type="text" name="key" size=40 value="">                         
<input type="submit" value="检索"></form>
****************************************************/  
require ("template.php");
echo "<p align="center">";
echo "检索结果";
echo "</p><hr>";
if (function_exists("set_time_limit") && !get_cfg_var('safe_mode')){
set_time_limit(600);}
function get_msg($path) {  
global $key, $i;  
$handle = opendir($path);  
while ($filename = readdir($handle)) {  
//echo $path."/".$filename."<br>";  
$newpath = $path."/".$filename;  
if (is_file($newpath)) {  
$fp = fopen($newpath, "r");  
$msg = fread($fp, filesize($newpath));  
fclose($fp);  
match_show($key, $msg, $newpath, $filename);  
}  
if (is_dir($path."/".$filename) && ($filename != ".") &&  ($filename != "..")) {  
//echo "<BR><BR><BR>".$newpath."<BR><BR><BR>";  
get_msg($path."/".$filename);  
}  
}  
closedir($handle);  
return $i;  
}  

function match_show($key, $msg, $newpath, $filename) {
global $i;
$key = chop($key);
if($key) { $check_type = preg_match("/.html?$/", $filename);
if($check_type) {$title = getHtmlTitle($msg);}
$msg = preg_replace("/<style>.+</style>/is", "", $msg);
$msg = preg_replace("/<[^>]+>/", "", $msg);
$value = preg_match("/.*$key.*/i", $msg, $res);
if($value) {

if($title) {$m = $title;} else {$m = $filename;}
$i++;
上一篇      目录      下一篇 = $newpath;
echo "$i.◆<a href="上一篇      目录      下一篇">$m</a><BR><BR>";
}
}else {
echo "请输入关键词";
exit;
}
}

function getHtmlTitle($msg) {

/* Locate where <title> is located in html file. */
$lBound = strpos($msg, '<title>') + 7; //7 is the lengh of <title>.

if ($lBound <1)
return;

/* Locate where </TITLE> is located in html file. */
$uBound = strpos($msg, '</title>', $lBound);

if ($uBound <$lBound)
return;

/* Clean HTML and PHP tags out of $title with the madness below. */
$title = ereg_replace("[tnr]", '', substr($msg, $lBound, $uBound - $lBound));
$title = trim(strip_tags($title));

if (strlen($title) <1) //A blank title is worthless.
return;

return $title;
}

$i = get_msg(".");
echo "<hr><p align="center">";
echo " 已经搜索到了 $i 条信息";
?>