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：
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<?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
$file = __FILE__;
if(empty($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\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);
}
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