$re = '/^(?:(?:00|\+)58|0)(?:2(?:12|4[0-9]|5[1-9]|6[0-9]|7[0-8]|8[1-35-8]|9[1-5]|3[45789]))\d{7}$/m';
$str = '02121234567
+582121234567
2121234567
(212)123.41.25
';
preg_match_all($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