A regular expression that matches various URLs

Ask for a regular expression that matches various URLs
There are about three types of matches to be matched.
1.http://www.aa.com/inx.php probably did.
2.http://localhost:80/inx.php probably did.
3.http://127.0.0.1:80/inx.php probably did.

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where not satisfied. How did you write the code?
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There's no problem with that.

PHP Code

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