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Код

<form method="POST"><input id="search" name="search" type="text"><input type="submit"></form>
<?php
error_reporting(0);
$find = new Find();
$show = $find->FReaddir($_SERVER['DOCUMENT_ROOT'],$_POST['search']);
Class Find {
    function FReaddir($path,$search){
        $dir = opendir($path);
        while ($file = readdir($dir)) {
            if ($file != '..' && $file != '.'){
                $arrfiletype = explode('.',$file);
                if (is_dir($path.'/'.$file)){
                    print '<ul><li><b>'.$itogtab.$file.'</b></li>';
                    $this->FReaddir($path.'/'.$file,$search);
                } elseif (is_file($path.'/'.$file) && $arrfiletype[1] == 'php'){
                    print '<ul><li><i><font color=#666666><b>'.$itogtab.$file.'</b></font></i></li>';
                    $this->FReadfile($path,$file,$search);
                }
            }
        }
        
        closedir($dir);
        print '</ul';
    }
    function FReadfile($folder,$file,$search){
        $fo = fopen($folder.'/'.$file,'r');
        if ($fo){
            for ($i=0; $na = fgets($fo);$i++){
                if ($search!=''){
                    if (stripos($na,$search)){
                        print '<input type="checkbox"/><font color=blue>'.$na.'</font><br/>';
                    }
                } else {
                    if (stripos($na,"location")){
                        print '<input type="checkbox"/><font color=red>'.$na.'</font><br/>';
                    } elseif (stripos($na,"include")){
                        print '<input type="checkbox"/><font color=blue>'.$na.'</font><br/>';
                    } elseif(stripos($na,"reqire")){
                        print '<input type="checkbox"/><font color=green>'.$na.'</font><br/>';
                    }
                }
            }
        fclose($fo);
        }
        print '</ul>';
    }
}
class Utils(){
}
?>