Concurrent CURL access and control the number of concurrencies through REDIS

// 队列redis连接操作
    public function RedisConnect() {
        $queue = 
Yii::app()->queue_redis;
        $server = $queue->host;
        $port = $queue->port;
        $timeout = $queue->timeOut;


  
      $redis =  new Redis();
        $redis->connect($server, $port, 
$timeout); // timeout=300
        return $redis;
    }

/**  redis计数控制并发
     *
     * @param       connomains: url数组
     * 
@param       key: redis键名
     * @param       max: 总运行次数
     * @param     
  ip:  ip
     * @param       c:   c当前循环次数
     * @param       i:   
并发控制,允许同时运行多少条
     * @return
     */
    private function 
redisCount(&$connomains,$key,$ip,$max,$c,$i=20){
        $RedisConnect = 
$this->RedisConnect();
        $redis = $RedisConnect->get($key);
  
      echo "redis==".$redis;
        if(isset($redis)){
            if($redis >= $i){
                if(!empty($connomains)){
            
        $this->multi_curl($connomains);
                    $connomains = 
array();
                }
                sleep(2);
                $this->redisCount($connomains,$key,$ip,$max,$c,$i); 
            }else{
                $RedisConnect->incr($key);
            }
    
    }
        
    }

//并发多线程访问
    private function multi_curl($links){
        $mh = 
curl_multi_init();
        $instances = array();
        foreach($links as 
$type=>$link){
            $instances[$type] = 
curl_init($link['url']);
            curl_setopt($instances[$type],CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($instances[$type],CURLOPT_TIMEOUT, 90);//原先90 2014/11/10
        
    curl_setopt($instances[$type],CURLOPT_POST, 1);
            curl_setopt($instances[$type],CURLOPT_POSTFIELDS, $link['data']);
            curl_multi_add_handle($mh,$instances[$type]);
        }
        
      
  // 
do{$n=curl_multi_exec($mh,$active);}while($active);//$active表示还有多少个连接要执行
    
    do {
            $mrc = curl_multi_exec($mh,$active);     
//curl_multi_exec运行结果0是成功，-1是有问题
        } while ($mrc == 
CURLM_CALL_MULTI_PERFORM);  //CURLM_CALL_MULTI_PERFORM常量，值-1
        while 
($active and $mrc == CURLM_OK) {       //CURLM_OK常量，值0
            if 
(curl_multi_select($mh) != -1) {      //curl_multi_select($mh) 
判断是否正在执行，未执行0，正在执行1，错误-1
                do {
                    $mrc = 
curl_multi_exec($mh, $active);    //$active表示还有多少个连接要执行
                } 
while ($mrc == CURLM_CALL_MULTI_PERFORM);
            }
        }
      
  
        foreach($links as $type=>$link){
            $res[$type] = 
curl_multi_getcontent($instances[$type]);
            curl_close($instances[$type]);
        }
        
        return 
$res;
    }