CakeRequest::data PHP Method

    public function data($name)
    {
        $args = func_get_args();
        if (count($args) === 2) {
            $this->data = Hash::insert($this->data, $name, $args[1]);
            return $this;
        }
        return Hash::get($this->data, $name);
    }

/**
 * Checks the fields to ensure they are supplied.
 *
 * @param CakeRequest $request The request that contains login information.
 * @param string $model The model used for login verification.
 * @param array $fields The fields to be checked.
 * @return boolean False if the fields have not been supplied. True if they exist.
 */
	protected function _checkFields(CakeRequest $request, $model, $fields) {
		if (empty($request->data[$model])) {
			return false;
		}
		foreach (array($fields['username'], $fields['password']) as $field) {
			$value = $request->data($model . '.' . $field);
			if (empty($value) || !is_string($value)) {
				return false;
			}
		}
		return true;
	}