PHP站内搜索

/****************************************************
原作者: uchinaboy
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（请单独存为html文件，如果放在search.php相同目录下，无需修改）：
****************************************************/
require ("search.inc");
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."
";
$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 "

".$newpath."

";
get_msg($path."/".$filename);
}
}
closedir($handle);
return $i;
}

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

$res[0] = preg_replace("/$key/i", "$key", $res[0]);
$k = $res[0];
$k = strrchr($k, " $k = substr($k, 1, 100);
$k = "$key<$k";
if($title) {$m = $title;} else {$m = $filename;}
$i++;
$link = $newpath;
$ar[] = "$i.◆$m

" .$k."

";
}
}else {
echo "请输入关键词";
exit;
}
}

function getHtmlTitle($msg) {

/* Locate where is located in html file. */
$uBound = strpos($msg, '', $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;
}

$i = get_msg(".");
if (empty($page)) $page=1;
$maxresult=($page*20);
$resultcount = count($ar);
if ($resultcount%20==0) $maxpageno=$resultcount/20;
else $maxpageno=floor($resultcount/20)+1;
if ($page>$maxpageno) { $page=$maxpageno; $pagemax=$resultcount-1; $pagemin=max
(0,$result_count-20);}
elseif ($page==1) {$pagemin=0; $pagemax=min($result_count-1,20-1); }
else { $pagemin=min($resultcount-1,20*($page-1)); $pagemax=min($resultcount-
1,$pagemin+20-1); }
$maxresult=min($maxresult,$resultcount);
echo "

";
echo "浩园软件检索结果";
echo "