$re = '/^(32[^15]|33[^20]|34[0-9]|35[^2-46-9]|36[^45790]|37[^6]|38[^125-7]|39[^4-689])(\d){5,7}/';
$str = '';
preg_match_all($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