$re = '/(\b91|\b0|\b)([6-9]\d{9})\b/i';
$str = '9207323601
8343434349
6790312345
9739393939
7777598086
my number is 7777598086
7777598086-
91-7777598086
+91-7777598086
+917777598086
+917777598086 is my number
07777598086
+91-07777598086
invalid inputs:
92073236011
47777598086
s77777598086
77777598086s
777777598086
1077777598086
+91077777598086
123149177777598086';
preg_match_all($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