Online PHP editor | refs for qaJ0S

<?php $names = array('Mike Cannon-Brookes', "Bill O'Hara-Jones", "Jane O'-Reilly", "Mary Smythe-'Fawkes"); foreach ($names as $name) { $name_valid = preg_match("/^(?!.*['-]{2})[a-zA-Z][a-zA-Z'\s-]{1,20}$/", $name); echo "$name is " . (($name_valid) ? "valid" : "not valid") . "\n"; }