$re = '/^(((\+|00)?(90)|0)[-| ]?)?((5\d{2})[-| ]?(\d{3})[-| ]?(\d{2})[-| ]?(\d{2}))$/m';
$str = '555-123-45-67
0 555 123 45 67
+905551234567
00905551234567';
preg_match_all($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