3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /*$str = '4111111111111111'; //$str = '4556494730120644'; $str = 'xxxxxxxxxxxx1111'; $sKey = '8519293193919192153'; $s = ''; $j = 0; for($i=0;$i < strlen($str);$i++) { $s .= chr( ord(substr($str,$i,1)) + ord(substr($sKey,$j++,1))); if($j==strlen($sKey)) $j=0; } ; echo utf8_decode($s); echo "\n"; echo utf8_encode($s); echo "===============\n"; echo utf8_decode("°­©±ª±«©±«±©jbjc");*/ echo utf8_encode('°­©±ª±«©±«±©jbjc');
based on u6kpq
Output for 4.3.0 - 7.1.0
°­©±ª±«©±«±©jbjc