<?php
error_reporting(0);
if ($_GET['file']){
$filename = $_GET['file'];
if ($filename=='hint.php'){
echo "come hacker!!!!!!!!!!!!";
}else{
ini_set('open_basedir','./');
if ($filename==''){
echo 'filename nononono!';
} else{
if(preg_match('/read|[\x00-\x2c]| |flag|\.\.|\.\//i', $filename)){
echo "hacker";
}else{
include($filename);
}
}
}
}else{
highlight_file(__FILE__);
}

这是正则符合么