[php] array_RequiredKeys()

/**
 * Check to see if an array is suppose to have specific keys.
 * This does not check to see if the keys have any values, it
 * only checks to see if the keys exists.
 *
 * @usage
 * $array = ['key' => 'meh', 'secret' => 'why'];
 * $requiredKeys = ['key', 'secret'];
 * array_RequiredKeys($requiredKeys, $array);
 *
 * @author John B. Abela <github:johnabela>
 * @created December 23, 2018 08:25 AM
 * @version 1.0.0
 * @return null
 */
function array_RequiredKeys($requiredKeys, $array) {
    //
    if (!is_array($array)) {
        die("The array we are suppose to check is not an array.");
    }
    //
    if (!is_array($requiredKeys)) {
        die("The requiredKeys array is not an array.");
    }
    //
    foreach ($requiredKeys as $key) {
        //
        if (!array_key_exists($key, $array)) {
            die("Missing a required array key: " . $key);
        }
        //
        if (!is_string($array[$key])) {
            die("The array key '" . $key . "' must be a string.");
        }
        //
    }
    //
}