Sean Wei says to YSITD $str = "tes-t"; $len = strlen($str); foreach ($i in range(0, $len)) { ➡️if ($str[$i] === '-') { ➡️➡️if (in_array($str[$i-1], range('a', 'z')) { ➡️➡️➡️%%% ➡️➡️} ➡️} }