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<?phperror_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 referenceprotected 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$file = __FILE__;if（empty（$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
";} else {$somecontent = "
//~~~~~~~~~~~~-这次请求序号是：" . $argv[1];sleep（mt_rand（0, 3））;$handle = fopen（$file, "a+"）;fwrite（$handle, $somecontent）;}