$re = '/^((8|\+374|\+994|\+995|\+375|\+7|\+380|\+38|\+996|\+998|\+993)[\- ]?)?\(?\d{3,5}\)?[\- ]?\d{1}[\- ]?\d{1}[\- ]?\d{1}[\- ]?\d{1}[\- ]?\d{1}(([\- ]?\d{1})?[\- ]?\d{1})?$/';
$str = '';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($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