3v4l.org

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<?php $your_crazy_input = chr(0)."flag"; if(isset($your_crazy_input)) { $position = strpos($your_crazy_input, "flag"); $length = strlen($your_crazy_input); echo $position; echo "\n"; echo $length; echo "\n"; $flag = 'hi'; echo urlencode(serialize(['qweq','that'])); if($position !== false && $length < 4) { echo $flag; } else { echo "Oh Sorry.. This isn't a crazy input."; } }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
1 5 a%3A2%3A%7Bi%3A0%3Bs%3A4%3A%22qweq%22%3Bi%3A1%3Bs%3A4%3A%22that%22%3B%7DOh Sorry.. This isn't a crazy input.
preferences:
281.52 ms | 404 KiB | 375 Q