$re = '/(((\+?98)?|0) ?9[\d ]+)/';
$str = '09123456789
+989123456789
989123456789
0912 345 6789
+98 912 345 6789';
preg_match_all($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