A regular expression matching various URLs-php Tutorial

Ask a regular expression that matches various URLs. There are about three types of matching. 1. www. aa. cominx. php is like this. 2. localhost: 802.16. php is like this 3.127.0.0.1: 802.16. php is like this. ------ solution ---------------- where is not satisfied. How did you write your code? --- Ask for a regular expression that matches various URLs
There are about three types of matching.
1. http://www.aa.com/inx.php is probably like this
2. http: // localhost: 80/Example. php is like this.
3. http: // 127.0.0.1: 80/. php is like this.

------ Solution --------------------
Where is not met. How did you write your code?
------ Solution --------------------
There is no problem above.

PHP code

$ Str = 'http: // 127.0.0.1: 80/latest. php '; if (preg_match ('/http: \/[^ \/] + \/\ w + \. \ w +/', $ str) echo 'yes'; else echo 'no ';