PHP JSON - Remove unwanted keys from json

ls_remove_unwanted from json.php

/** 
 * Removes unwanted keys from JSON string
 * @param string $response
 * @param array $exclude
 * @return string
 *
 *
 */
function ls_remove_unwanted_from_json($response , $exclude) {
    $jsonArray = json_decode($response , true);
    foreach ( $jsonArray as $key => $value ) {
        foreach ( $exclude as $keyToRemove ) {
            unset($jsonArray[$key][$keyToRemove]);
        }
    }

    return json_encode($jsonArray);
}