PHP封装一个redis类。

<?php

namespace App\Services;

use App\Handlers\RedisKeyHandler;

/**
 * Redis操作类
 * 2020-7-4 16:39:09
 * Class RedisServices
 * @package App\Services
 */
class RedisServices
{

    private static $_instance = '';
    private $redis;

    private function __construct()
    {

        if (!extension_loaded('redis')) {
            exit('请在服务器安装 redis扩展');
        }

        $this->redis = new \Redis();
        $this->redis->connect(env('REDIS_HOST', '127.0.0.1'), env('REDIS_PORT', 6379));
        $this->redis->auth(env('REDIS_PASSWORD', ''));
        $this->redis->select(14);   // 选择默认14库
    }

    private function __clone()
    {
    }

    public static function getInstance()
    {
        if (!self::$_instance instanceof RedisServices) {
            self::$_instance = new RedisServices();
        }
        return self::$_instance;
    }

    /**
     * 获取 设置 set, setnx, get, del, exists, setex, psetex, hset, hget, hgetall, lpush, lpop, rpush, rpop, llen, hlen, lindex, sadd, smembers, spop, zadd, , ,
     * @param $name
     * @param $arguments
     * @return string
     */
    public function __call($name, $arguments)
    {
        if (empty($name)) return false;
        if (empty($arguments)) return false;

        $count = count($arguments);
        $result = '';
        switch ($count) {
            case 1:
                $result = $this->redis->$name($arguments['0']);
                break;
            case 2:
                $result = $this->redis->$name($arguments['0'], $arguments['1']);
                break;
            case 3:
                $result = $this->redis->$name($arguments['0'], $arguments['1'], $arguments['2']);
                break;
            default:
                break;
        }
        return $result;
    }


    /**
     * 维护fd=uid的有序集合
     * @param string $model
     * @param int $fd
     * @param int $uid
     * @param bool $isDel 清理fd 此时必须传fd
     * @return bool|string|void
     * @throws \EasySwoole\Redis\Exception\RedisException
     */
    static function fdList($fd = 0, $uid = 0, $isDel = false)
    {

        $key = RedisKeyHandler::WEB_SOCKET_FD_USER;

        if ($isDel && $fd) {
            return self::getInstance()->zRemRangeByScore($key, $fd, $fd);
        }
        if ($fd && $uid) {
            return self::getInstance()->zAdd($key, $fd, $uid);
        }

        if ($fd) {
            return self::getInstance()->zRangeByScore($key, $fd, $fd, ['withScores' => false, 'limit' => array(0, 1)]);
        }

        if ($uid) {
            return self::getInstance()->zScore($key, $uid);
        }
    }


}