3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo "aaaa"; /* $s="0?kgwLX371\23\5z62e2:Wn0@l.1?\4j64A403{3\5S1'\13"; $q="str_replace"; $g = ""; while (strlen($g)<strlen($s)) { $q = pack("H*",md5($g.$q."q1w2e3r4")); $g.=substr($q,0,8); } echo $s^$g; */
Output for 5.3.0 - 7.2.0
aaaa