Online PHP editor | refs for qjBN8

<?php var_dump(preg_match('/^[a-z0-9-]/i', 'Something.doc')); var_dump(preg_match('/^[a-z0-9-]*/i', 'Something.doc')); var_dump(preg_match('/^[a-z0-9-]*$/i', 'Something.doc')); var_dump(preg_match('/^[a-z0-9-.]*$/i', 'Something.doc')); var_dump(preg_match('/^[a-z0-9-]/i', 'Something#&.doc')); var_dump(preg_match('/^[a-z0-9-]*/i', 'Something#&.doc')); var_dump(preg_match('/^[a-z0-9-]*$/i', 'Something#&.doc')); var_dump(preg_match('/^[a-z0-9-.]*$/i', 'Something#&.doc'));