$re = '/^(?=(?:\D*\d){10,15}\D*$)\+?[0-9]{1,3}[\s-]?(?:\(0?[0-9]{1,5}\)|[0-9]{1,5})[-\s]?[0-9][\d\s-]{5,7}\s?(?:x[\d-]{0,4})?$/m';
$str = '123456789
1234567890123456
12(34567890
123)456789012345
+9-123-4567890
+9-123-456-7890
+9(123)4567890
123456789012345';
preg_match_all($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