$re = '/^(?:\+?(?:(?:\d){1,3}[ .-]?))?\(?(?:\d{3})\)?[ .-]?\d{3}[ .-]?\d{4}$/mi';
$str = '+1 951-543.1630
9515431630
951.543.1630
951-543-1630
(951)-543-1630
951 543 1630
4000220220448316
300 951 543 1630
12 852 456 1562
1562215622';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php