<?php $a = "Hello"; $b = "world"; $matching = array_unique(array_intersect(str_split(strtolower($a)), str_split(strtolower($b)))); $s = microtime(true); if(count($matching)>0) echo "\nmatching characters: " . implode(", ", $matching); echo "\n" . (microtime(true)-$s)*100; $t = microtime(true); if($matching) echo "\nmatching characters: " . implode(", ", $matching); echo "\n" . (microtime(true)-$t)*100;
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