Home > Backend Development > PHP Tutorial > PHP multithreading classes and usage examples

PHP multithreading classes and usage examples

高洛峰
Release: 2023-03-03 19:54:01
Original
1635 people have browsed it

本文实例讲述了PHP多线程类及用法。分享给大家供大家参考。具体分析如下:

一般来说可通过WEB服务器来实现PHP多线程功能,当然,对多线程有深入理解的人都知道通过WEB服务器实现的多线程只能模仿多线程的一些效果,并不是真正意义上的多线程.

但不管怎么样,它还是能满足我们的一些需要的,在需要类似多线程的功能方面还是可以采用这个类,代码如下:

/** 
* @title: PHP多线程类(Thread) 
* @version: 1.0 
* 
* PHP多线程应用示例: 
* require_once 'thread.class.php'; 
* $thread = new thread(); 
* $thread->addthread('action_log','a'); 
* $thread->addthread('action_log','b'); 
* $thread->addthread('action_log','c'); 
* $thread->runthread(); 
* 
* function action_log($info) { 
* $log = 'log/' . microtime() . '.log'; 
* $txt = $info . "rnrn" . 'Set in ' . Date('h:i:s', time()) . (double)microtime() . "rn"; 
* $fp = fopen($log, 'w'); 
* fwrite($fp, $txt); 
* fclose($fp); 
* } 
*/ 
class thread { 
var $hooks = array(); 
var $args = array(); 
function thread() { 
} 
function addthread($func) 
{ 
$args = array_slice(func_get_args(), 1); 
$this->hooks[] = $func; 
$this->args[] = $args; 
return true; 
} 
function runthread() 
{ 
if(isset($_GET['flag'])) 
{ 
$flag = intval($_GET['flag']); 
} 
if($flag || $flag === 0) 
{ 
call_user_func_array($this->hooks[$flag], $this->args[$flag]); 
} 
else 
{ 
for($i = 0, $size = count($this->hooks); $i < $size; $i++) 
{ 
$fp=fsockopen($_SERVER[&#39;HTTP_HOST&#39;],$_SERVER[&#39;SERVER_PORT&#39;]); 
if($fp) 
{ 
$out = "GET {$_SERVER[&#39;PHP_SELF&#39;]}?flag=$i HTTP/1.1rn"; 
$out .= "Host: {$_SERVER[&#39;HTTP_HOST&#39;]}rn"; 
$out .= "Connection: Closernrn"; 
fputs($fp,$out); 
fclose($fp); 
} 
} 
} 
} 
}
Copy after login

使用方法,代码如下:

$thread = new thread(); 
$thread->addthread(&#39;func1&#39;,&#39;info1&#39;); 
$thread->addthread(&#39;func2&#39;,&#39;info2&#39;); 
$thread->addthread(&#39;func3&#39;,&#39;info3&#39;); 
$thread->runthread();
Copy after login

说明:

addthread() 是添加线程函数,第一个参数是函数名,之后的参数(可选)为传递给指定函数的参数.

runthread() 是执行线程的函数.

PHP实例:利用curl实现多线程下载图片

其实是php利用curl实现的一个多线程类,有了这个类,我们也可利用该类执行多线程任务了,代码如下:

class curl_multi{  
    private $url_list=array();  
    private $curl_setopt=array(  
        &#39;CURLOPT_RETURNTRANSFER&#39; => 1,//结果返回给变量  
        &#39;CURLOPT_HEADER&#39; => 0,//是否需要返回HTTP头  
        &#39;CURLOPT_NOBODY&#39; => 0,//是否需要返回的内容  
        &#39;CURLOPT_FOLLOWLOCATION&#39; => 0,//自动跟踪  
        &#39;CURLOPT_TIMEOUT&#39; => 6//超时时间(s)  
    );  
    function __construct($seconds=30){  
        set_time_limit($seconds);  
    }  
    /*  
     * 设置网址  
     * @list 数组  
     */  
    public function setUrlList($list=array()){  
        $this->url_list=$list;  
    }  
    /*  
     * 设置参数  
     * @cutPot array  
     */  
    public function setOpt($cutPot){  
        $this->curl_setopt=$cutPot+$this->curl_setopt;  
    }  
    /*  
     * 执行  
     * @return array  
     */  
    public function execute(){  
        $mh=curl_multi_init();  
        foreach($this->url_list as $i=>$url){  
            $conn[$i]=curl_init($url);  
            foreach($this->curl_setopt as $key => $val){  
                curl_setopt($conn[$i],preg_replace(&#39;/(CURLOPT_w{1,})/ie&#39;,&#39;$0&#39;,$key),$val);  
            }  
            curl_multi_add_handle($mh,$conn[$i]);  
        }  
        $active=false;  
        do{  
            $mrc=curl_multi_exec($mh,$active);  
        }while($mrc == CURLM_CALL_MULTI_PERFORM);  
  
        while($active and $mrc == CURLM_OK){  
            if(curl_multi_select($mh) != -1){  
                do{  
                    $mrc=curl_multi_exec($mh,$active);  
                }while($mrc == CURLM_CALL_MULTI_PERFORM);  
            }  
        }  
        $res=array();  
        foreach($this->url_list as $i => $url){  
            $res[$i]=curl_multi_getcontent($conn[$i]);  
            curl_close($conn[$i]);  
            curl_multi_remove_handle($mh,$conn[$i]);//释放资源    
        }  
        curl_multi_close($mh);  
        return $res;  
    }  
}
Copy after login

php使用多线程下载类示例,下载远程图片,代码如下:

$curl_mul=new curl_multi();  
$curl_mul->setUrlList(array(&#39;http://www.php.cn/img/logo.jpg&#39;,&#39;http://www.php.cn/img/logo.jpg&#39;,&#39;http://www.php.cn/img/logo.jpg&#39;));  
$a=$curl_mul->execute();  
$i=1;  
foreach($a as $v){  
        $filename=$i.&#39;.gif&#39;;  
        $fp2=@fopen($filename,&#39;a&#39;);  
        fwrite($fp2,$v);  
        fclose($fp2);  
        $i++;  
}
Copy after login

更多PHP多线程类及用法实例相关文章请关注PHP中文网!


Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template