$re = '/^(0098|\+98|98|0|)(9\d{9}$)/m';
$str = '00989123456789
+989123456789
989123456789
09123456789
9123456789
321351321321
+98913131532
sad00989123456789
00989123456789abc';
preg_match_all($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