Description:
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Try to use "pathinfo" function for retrieving filename from URL with only a base URL. For example 'http://www.abc.com/'. It must return a null value, but returning 'www.abc' which is wrong not a file.

Reproduce code:
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<?php
$url="http://www.abc.com/";
echo pathinfo($url,PATHINFO_FILENAME);
?>

Expected result:
----------------
null

Actual result:
--------------
www.abc