无字母数字绕过.php

<?php
/* 注意: 请先执行一遍此脚本，再执行随附的py脚本 */
/*author FightnvrGP*/

function createxor($preg)
{
    $myfile = fopen("xor_rce.txt", "w");
    $contents = "";
    for ($i = 0; $i < 256; $i++) {
        for ($j = 0; $j < 256; $j++) {

            if ($i < 16) {
                $hex_i = '0' . dechex($i);
            } else {
                $hex_i = dechex($i);
            }
            if ($j < 16) {
                $hex_j = '0' . dechex($j);
            } else {
                $hex_j = dechex($j);
            }
            if (preg_match($preg, hex2bin($hex_i)) || preg_match($preg, hex2bin($hex_j))) {
                echo "";
            } else {
                $a = '%' . $hex_i;
                $b = '%' . $hex_j;
                $c = (urldecode($a) ^ urldecode($b));
                if (ord($c) >= 32 & ord($c) <= 126) {
                    $contents = $contents . $c . " " . $a . " " . $b . "\n";
                }
            }

        }
    }
    fwrite($myfile, $contents);
    fclose($myfile);
}

function createor($preg)
{
    $myfile = fopen("or_rce.txt", "w");
    $contents = "";
    for ($i = 0; $i < 256; $i++) {
        for ($j = 0; $j < 256; $j++) {

            if ($i < 16) {
                $hex_i = '0' . dechex($i);
            } else {
                $hex_i = dechex($i);
            }
            if ($j < 16) {
                $hex_j = '0' . dechex($j);
            } else {
                $hex_j = dechex($j);
            }
            if (preg_match($preg, hex2bin($hex_i)) || preg_match($preg, hex2bin($hex_j))) {
                echo "";
            } else {
                $a = '%' . $hex_i;
                $b = '%' . $hex_j;
                $c = (urldecode($a) | urldecode($b));
                if (ord($c) >= 32 & ord($c) <= 126) {
                    $contents = $contents . $c . " " . $a . " " . $b . "\n";
                }
            }

        }
    }
    fwrite($myfile, $contents);
    fclose($myfile);
}

$preg = '/[0-9]|[a-z]|\^|\+|\~|\$|\[|\]|\{|\}|\&|\-/i';
//此处填入题目中过滤字符用的正则表达式
createor($preg);
createxor($preg);