<?php
$input = '';
$code = '';
for ($i = 0; isset($input[$i]); $i++) {
$code .= $code ? '.' : '';
$code .= sprintf('(function($str, $pos) { $length = (function($str) { for ($l = 0; isset($str[$l]); $l++) {} return $l - 1; })($str); return $str[$length - $pos]; })(%s, %u)', var_export($input, true), $i);
}
$code = sprintf('return %s;', $code);
var_dump($code);
var_dump(eval($code));
- Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
- string(8) "return ;"
NULL
- Output for 5.0.0 - 5.0.1
- string(162) "return (function($str, $pos) { $length = (function($str) { for ($l = 0; isset($str[$l]); $l++) {} return $l - 1; })($str); return $str[$length - $pos]; })('', 0);"
Parse error: parse error, unexpected T_FUNCTION in /in/X2KvA(14) : eval()'d code on line 1
bool(false)
Process exited with code 255. - Output for 4.3.0 - 4.3.2
- Notice: Uninitialized string offset: 0 in /in/X2KvA on line 6
string(8) "return ;"
NULL
preferences:
207.96 ms | 401 KiB | 314 Q