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@ 2013-04-18T14:07:53Z

<?php
for($i=0;$i<256;$i++){
	$data = "a".chr($i)."b";
	$a=preg_replace("/[^-_a-z]/", "", $data);
	if($a!="ab") echo chr($i)."\n";
}
?>

Output
Performance
VLD
References
Branches

chr: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

34.13 ms | 402 KiB | 5 Q