Online PHP editor | refs for X0Sif

<?php $string1 = 'The lazy cat jumps over the fast fox'; $string2 = 'The fast fox jumps over the lazy cat'; $len=strlen($string1); const runs=31337; $start=microtime(1); $i=0;while (++$i<runs) { $xor = $string1 ^ $string2; $pos=0;while(($pos+=strspn($xor,"\0",$pos))<$len) { // print 'Diff @'.$pos.' String1:'.$string1[$pos].' String2:'.$string2[$pos]." \n"; $pos++; } } print "ircmax's XOR+strspn + ka's loop: \n".(microtime(1)-$start)."sec \n \n"; $start=microtime(1); $i=0;while (++$i<runs) { for ($offset = 0; $offset < $len; ++$offset) { if ($string1[$offset] !== $string2[$offset]) { //print 'Diff @'.$offset.' String1:'.$string1[$offset].' String2:'.$string2[$offset]." \n"; } } } print "NikiC's example from question body: \n".(microtime(1)-$start)."sec \n";