redis的sort函数 [ 2.0 版本 ]

yii\redis\Connection 支持的命令中找到以下注释：

'SORT', // key [BY pattern] [LIMIT offset count] [GET pattern [GET pattern ...]] [ASC|DESC] [ALPHA] [STORE destination] Sort the elements in a list, set or sorted set

所有的这些命令都会通过下面这个方法执行：

/**

 * Allows issuing all supported commands via magic methods.
 *
 * ```php
 * $redis->hmset(['test_collection', 'key1', 'val1', 'key2', 'val2'])
 * ```
 *
 * @param string $name name of the missing method to execute
 * @param array $params method call arguments
 * @return mixed
 */
public function __call($name, $params)
{
    $redisCommand = strtoupper(Inflector::camel2words($name, false));
    if (in_array($redisCommand, $this->redisCommands)) {
        return $this->executeCommand($name, $params);
    } else {
        return parent::__call($name, $params);
    }
}

    public function executeCommand($name, $params = [])
    {
        $this->open();

        array_unshift($params, $name);
        $command = '*' . count($params) . "\r\n";
        foreach ($params as $arg) {
            $command .= '$' . mb_strlen($arg, '8bit') . "\r\n" . $arg . "\r\n";
        }

        \Yii::trace("Executing Redis Command: {$name}", __METHOD__);
        fwrite($this->_socket, $command);

        return $this->parseResponse(implode(' ', $params));
    }

最终将命令拼成字符串执行，所以正确的写法是

Yii::$app->redis->sort('keyName', 'LIMIT', '0', '1']);