3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string1 = 'The lazy cat jumps over the fast fox.'; $string2 = 'The fast fox jumps over the lazy cat.'; $xor = $string1 ^ $string2; var_dump($xor);die(); $pos=0;$len=strlen($xor); while($pos<$len) { $pos=strspn($xor,"\0",$pos); print 'Diff @'.$pos.' String1:'.$string1[$pos].' String2:'.$string2[$pos].'<br>'; $pos++; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 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, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(37) "   "
preferences:
227.45 ms | 406 KiB | 352 Q