$re = '/(\()?(\+62|62|0)(\d{2,3})?\)?[ .-]?\d{2,4}[ .-]?\d{2,4}[ .-]?\d{2,4}/';
$str = 'here is my phone (0817)34567890
0817.3456.7890
0817 3456 7890
(+62) 81734567890
(+62) 817-3456-7890
+6281734567890
+62-817-3456-7890
+62817 3456 7890';
preg_match_all($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