- var_dump: documentation ( source)
- parse_str: documentation ( source)
- parse_url: documentation ( source)
- array_filter: documentation ( source)
- http_build_query: documentation ( source)
<?php
$queryString = '/post.php?foo=5&bar=&baz=2&bee=&fee=&feo=8';
$queryUrl = parse_url($queryString); //path, query
parse_str($queryUrl['query'], $args);
$args = array_filter($args);
$queryString = $queryUrl['path'].http_build_query($args);
var_dump($queryString);