function _form_options_flatten

Iterates over an array and returns a flat array with duplicate keys removed.

This function also handles cases where objects are passed as array values.

Related topics

File

includes/form.inc, line 2699

Code

function _form_options_flatten($array) {
    $return =& drupal_static(__FUNCTION__);
    foreach ($array as $key => $value) {
        if (is_object($value)) {
            _form_options_flatten($value->option);
        }
        elseif (is_array($value)) {
            _form_options_flatten($value);
        }
        else {
            $return[$key] = 1;
        }
    }
    return $return;
}