http_build_query ignores the key if the value is an empty array. How is this not a bug?

Question

I ran into a problem today where I was passing a key with the value set to an empty array to http_build_query(). E.g.:

$args = array(\"foo\", \"bar\         


        

Answer 1

You can simply walk the query params, if empty array, use "[]" instead, like this:

function walkCriteria(&$criteria) {
    array_walk($criteria, function (&$val) {
        if ($val === []) {
            $val = "[]";
        } else if (is_array($val)) {
            walkCriteria($val);
        }
    });
}

Don't use array_walk_recursive. Because it will walk into the empty array and do nothing.