encryptByKey这个方法加密出来的字符是乱码无法被json化 [ 2.0 版本 ]

$a= Yii::$app->security->encryptByKey('123','a');
$a= base64_encode($a);

不是很麻烦吧

/**
 * 字符串 加密
 * @param null $string
 * @return null|string
 */
function encryptString($string=null)
{
    return $string?base64_encode(app()->getSecurity()->encryptByPassword($string, config('cryptSecretKey'))):null;
}

/**
 * 字符串 解密
 * @param null $string
 * @return null|string
 */
function decryptString($string=null)
{
    return $string?app()->getSecurity()->encryptByPassword(base64_decode($string), config('cryptSecretKey')):null;
}