php - 多线程

###1. php5.3 以上版本（必须是线程安全），使用php_pthreads扩展，可使php真正地支持多线程。 ###2. 下载安装

1. windows 下载地址 windows 注意须要将“pthreadVC2.dll”拷贝到windows目录下。
2. linux 下载地址 linux
3. 参考文档 文档

###3. 测试代码 使用多线程平均时间：8.5S, 使用foreach循环平均时间：22.0S

<!-- lang: php -->
<?php
//多线程测试
class myThread extends Thread{
	public $url 	= null;
	public $data 	= null;

	public function __construct($url){
		$this->url = $url;
	}

	public function run(){
		$this->data = model_http_curl_get($this->url);
		$file = './pic/' . md5($this->url) . '.html';
		file_put_contents($file, $this->data);
	}
}


function getByThread($urls){
	$thread_array = array();
	foreach ($urls as $key => $value){
        $thread_array[$key] = new myThread($value["url"]);
        $thread_array[$key]->start();
    }
}

function getByforeach($urls){
	foreach($urls as $key=>$value){
		echo $key;
		$data = model_http_curl_get($value["url"]);
		$file = './pic/' . $key . '.html';
		file_put_contents($file, $data);
	}
}



 function model_http_curl_get($url,$userAgent=""){
	$userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)';
	$curl = curl_init();
	curl_setopt($curl, CURLOPT_URL, $url);  
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($curl, CURLOPT_TIMEOUT, 5);
	curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);
	$result = curl_exec($curl);
	curl_close($curl);
	return $result;
}


//开始测试
$urls_array = array();
for ($i=1; $i <= 30; $i++){
	
    //$urls_array[] = array("url" => "http://www.baidu.com/s?wd=".mt_rand(10000,20000));
    $urls_array[] = array("url" => "http://tu.duowan.com/gallery/86760.html#p". $i);
}
//多线程
getByThread($urls_array);

//foreahc循环 - 平均 22.0s
//getByforeach($urls_array);
?>