Description:
------------
---
From manual page: http://www.php.net/filter.filters.validate
---

As I understand the documentation, 0 (zero) should be a valid float, but it fails 
while testing.

Test script:
---------------
<?php
$var=0;

if (!filter_var($var, FILTER_VALIDATE_FLOAT))
{
echo "Not valid";
}
else
{
echo "Valid";
}

?>