$re = '/^((091|\+91)?|\((091|\+91)?\)|(91)?|\(91\)|0)? ?[7-9][0-9]{9}$/m';
$str = '+91 7990989898
91 7990989898
091 7990989898
0 7990989898
(0+91)7990989898
+7990989898
0(+91) 7990989898
0(91) 7990989898
7990989898
+917990989898
917990989898
07990989898
0917990989898
(91)7990989898
(+91)7990989898
(91) 7990989898
(+91) 7990989898
(091) 7990989898
(091)7990989898
0+91 7990989898';
preg_match_all($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