php多任务程序实例解析

发布:smiling　来源: PHP粉丝网　添加日期：2021-03-22 14:17:54　浏览: 评论：0　

这篇文章主要介绍了php多任务程序实例,需要的朋友可以参考下，本文以实例简单解析了php多任务程序的实现方法，具体代码如下：

<?php

error_reporting(E_ALL);

set_time_limit(0);

/**

* php多任务程序的实现

* 借助proc_open

* 其实该叫进程(process)

* 能启动多进程，你可以使用你的想象力做你想做的了，以后再写个能用的

* 如果你是在linux上跑php，并且启用pcntl模块后，使用pcntl函数该更好

*

*/

class Thread {

  protected $_pref; // process reference

  protected static $_instance = null;

  protected $_pipes;



  private function __construct() {

    $this->_pref = 0;

  }



  public static function getInstance($file) {

    if (null == self::$_instance) {

      self::$_instance = new self;

    }



    $descriptor = array(

    0 => array("pipe", "r"),

    1 => array("pipe", "w"),

    2 => array("file", "./error-output.txt", "a"),

    );

    self::$_instance->_pref = proc_open("php -q $file", $descriptor, self::$_instance->_pipes);

    return true;

  }



  public function __destruct() {

    proc_close($this->_pref);

    $this->_pref = null;

  }

}

// 测试代码

$file = __FILE__;

if(emptyempty($argv[1])) {

  $t2 = Thread::getInstance("$file 1");

  $t3 = Thread::getInstance("$file 2");

  $t4 = Thread::getInstance("$file 3");

  $t5 = Thread::getInstance("$file 4");

  $t5 = Thread::getInstance("$file 5");

  $t5 = Thread::getInstance("$file 6");

  $t2 = Thread::getInstance("$file 7");

  $t3 = Thread::getInstance("$file 8");

  $t4 = Thread::getInstance("$file 9");

  $t5 = Thread::getInstance("$file 10");

  $t5 = Thread::getInstance("$file 11");

  $t5 = Thread::getInstance("$file 12");

  echo "Main thread done\n";

} else {

  $somecontent = "\r\n//~~~~~~~~~~~~-这次请求序号是：" . $argv[1];

  sleep(mt_rand(0, 3));

  $handle = fopen($file, 'a+');

  fwrite($handle, $somecontent);

}