function drupal_http_build_query

7.x drupal_http_build_query(array $query, $parent = '')

Parses an array into a valid, rawurlencoded query string.

This differs from http_build_query() as we need to rawurlencode() (instead of urlencode()) all query parameters.


$query: The query parameter array to be processed, e.g. $_GET.

$parent: Internal use only. Used to build the $query array key for nested items.

Return value

A rawurlencoded string which can be used as or appended to the URL query string.

See also


Related topics

9 calls to drupal_http_build_query()
CommonURLUnitTest::testDrupalHttpBuildQuery in drupal/modules/simpletest/tests/common.test
Test drupal_http_build_query().
drupal_current_script_url in drupal/includes/
Returns the URL of the current script, with modified query parameters.
drupal_get_destination in drupal/includes/
Prepares a 'destination' URL query parameter for use with drupal_goto().
image_style_url in drupal/modules/image/image.module
Returns the URL for an image derivative given a style and image path.
install_redirect_url in drupal/includes/
Returns the URL that should be redirected to during an installation request.

... See full list


drupal/includes/, line 486
Common functions that many Drupal modules will need to reference.


function drupal_http_build_query(array $query, $parent = '') {
  $params = array();

  foreach ($query as $key => $value) {
    $key = ($parent ? $parent . '[' . rawurlencode($key) . ']' : rawurlencode($key));

    // Recurse into children.
    if (is_array($value)) {
      $params[] = drupal_http_build_query($value, $key);
    // If a query parameter value is NULL, only append its key.
    elseif (!isset($value)) {
      $params[] = $key;
    else {
      // For better readability of paths in query strings, we decode slashes.
      $params[] = $key . '=' . str_replace('%2F', '/', rawurlencode($value));

  return implode('&', $params);