如何在将url与特定字符串匹配后从网址获取用户名？

Question

I want to get username from an url after checking the rest of url is similar to a string.

For eg : I need username from the url 'http://mysite.com/username' . before that need to check

site url as 'http://mysite.com/' and also username part contains only alphabets,numbers,

underscore and periods..

How is it possible using php?

Answer 1

I have tested with PHP5.4.5:

<?php

$simple = 'http://mysite.com/username';

if ( preg_match('/http:\/\/mysite\.com\/(?:([-\w]+)\/?)/', $simple, $match) > 0){
    echo 'Username is: '.$match[1] . "
";

}

$complex = 'http://mysite.com.zzz.yyy/john/';
if ( preg_match('/http:\/\/\w+(?:\.\w+)*\/(?:([-\w]+)\/?)/', $complex, $match) > 0){
    echo 'Username is: '.$match[1] . "
";

}

?>

output:

Username is: username
Username is: john