Description:
------------
There is a type of link that would always return false when checking if it is a valid link, a link such as:

http://img8.warez-bb.org/images/wbb_logo_v2.jpg

So that type of link (provided above) will always return false.

Test script:
---------------
if(filter_var('http://img8.warez-bb.org/images/wbb_logo_v2.jpg', FILTER_VALIDATE_URL))
{
    echo 'valid';
}
else
{
    echo 'not valid';
}