翻出一篇老文章: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++;
$link = $newpath;
echo "$i.◆<a href=\"$link\">$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. */
$title = ereg_replace("[\t\n\r]", '', substr($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";
?>

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