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

Building on @anyx solution: If you want to preserve the original array and also handle NULL values, you can use this version:

function empty2blank(array $arr) {
 array_walk($arr, function(&$val, $key) {
  if (empty($val)) { 
   $val = is_array($val) ? '[]' : '';
  } elseif (is_array($val)) {
   $val = empty2blank($val);
  }
 });
 return $arr;
}