[资源]PHP使用消息队列

利用PHP操作Linux消息队列完成进程间通信

基于HTTP协议的轻量级开源简单队列服务：HTTPSQS[原创]

Redis队列——PHP操作简单示例

入队操作
<?php
$redis = new Redis();
$redis->connect('127.0.0.1',6379);
while(True){
  try{
    $value = 'value_'.date('Y-m-d H:i:s');
    $redis->LPUSH('key1',$value);
    sleep(rand()%3);
    echo $value."\n";
  }catch(Exception $e){
    echo $e->getMessage()."\n";
  }
}
?>

出队操作
<?php
$redis = new Redis();
$redis->pconnect('127.0.0.1',6379);
while(True){
  try{
    echo $redis->LPOP('key1')."\n";
  }catch(Exception $e){
  echo $e->getMessage()."\n";
  }
  sleep(rand()%3);
}
?>

利用redis的队列机制实现php的多线程

队列在编程中的实际应用(php)

php之任务队列-shmop

<?php
/**
* 使用共享内存的PHP循环内存队列实现
* 支持多进程, 支持各种数据类型的存储
* 注: 完成入队或出队操作,尽快使用unset(), 以释放临界区
*
* @author [e-mail]
* @created 2009-12-23
*/
class SHMQueue
{
    private $maxQSize = 0; // 队列最大长度   

    private $front = 0; // 队头指针
    private $rear = 0;  // 队尾指针   

    private $blockSize = 256;  // 块的大小(byte)
    private $memSize = 25600;  // 最大共享内存(byte)
    private $shmId = 0;   

    private $filePtr = './shmq.ptr';   

    private $semId = 0;
    public function __construct()
    {
        $shmkey = ftok(__FILE__, 't');   

        $this->shmId = shmop_open($shmkey, "c", 0644, $this->memSize );
        $this->maxQSize = $this->memSize / $this->blockSize;   

         // 申請一个信号量
        $this->semId = sem_get($shmkey, 1);
        sem_acquire($this->semId); // 申请进入临界区           

        $this->init();
    }   

    private function init()
    {
        if ( file_exists($this->filePtr) ){
            $contents = file_get_contents($this->filePtr);
            $data = explode( '|', $contents );
            if ( isset($data[0]) && isset($data[1])){
                $this->front = (int)$data[0];
                $this->rear  = (int)$data[1];
            }
        }
    }   

    public function getLength()
    {
        return (($this->rear - $this->front + $this->memSize) % ($this->memSize) )/$this->blockSize;
    }   

    public function enQueue( $value )
    {
        if ( $this->ptrInc($this->rear) == $this->front ){ // 队满
            return false;
        }   

        $data = $this->encode($value);
        shmop_write($this->shmId, $data, $this->rear );
        $this->rear = $this->ptrInc($this->rear);
        return true;
    }   

    public function deQueue()
    {
        if ( $this->front == $this->rear ){ // 队空
            return false;
        }
        $value = shmop_read($this->shmId, $this->front, $this->blockSize-1);
        $this->front = $this->ptrInc($this->front);
        return $this->decode($value);
    }   

    private function ptrInc( $ptr )
    {
        return ($ptr + $this->blockSize) % ($this->memSize);
    }   

    private function encode( $value )
    {
        $data = serialize($value) . "__eof";
        if ( strlen($data) > $this->blockSize -1 ){
            throw new Exception(strlen($data)." is overload block size!");
        }
        return $data;
    }   

    private function decode( $value )
    {
        $data = explode("__eof", $value);
        return unserialize($data[0]);
    }   

    public function __destruct()
    {
        $data = $this->front . '|' . $this->rear;
        file_put_contents($this->filePtr, $data);   

        sem_release($this->semId); // 出临界区, 释放信号量
    }
}  

使用的样例代码如下:
// 进队操作
$shmq = new SHMQueue();
$data = 'test data';
$shmq->enQueue($data);
unset($shmq);
// 出队操作
$shmq = new SHMQueue();
$data = $shmq->deQueue();
unset($shmq);

PHP实现队列及队列原理

队列应用场景，自己实现队列

RabbitMQ

php mqtt

PHP大型网站的架构实例分析

使用fastcgi_finish_request提高页面响应速度

Redis pub/sub(Publish,Subscribe)