<?php $re = "/\A[(]?[0-9]{3}[)]?[ ,-]?[0-9]{3}[ ,-]?[0-9]{4}\z/"; $strs = array("909-999-9999", "909 999 9999", "(909) 999-9999", "(909) 999 9999", "999 999 9999","9999999999");
Standard input is empty
Array
(
[0] => 909-999-9999
[1] => 909 999 9999
[2] => (909) 999-9999
[3] => (909) 999 9999
[4] => 999 999 9999
[5] => 9999999999
)