$re = '/^(?:(?:Tel|Phone Number|Phone): )?(\+?\(?\d{3}\)?[-. ]\d{3}[-. ]\d{4})$/m';
$str = '+111-111-1111
Tel: 111-111-1111
Phone Number: (111)-111-1111
Fax: 111-111-1111
Phone: 111-111-1111';
preg_match_all($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