PHP multithreading classes and usage examples-PHP Tutorial-php.cn

PHP multithreading classes and usage examples

高洛峰

Release： 2023-03-03 19:54:01

Original

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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 &#39;thread.class.php&#39;; 
* $thread = new thread(); 
* $thread->addthread(&#39;action_log&#39;,&#39;a&#39;); 
* $thread->addthread(&#39;action_log&#39;,&#39;b&#39;); 
* $thread->addthread(&#39;action_log&#39;,&#39;c&#39;); 
* $thread->runthread(); 
* 
* function action_log($info) { 
* $log = &#39;log/&#39; . microtime() . &#39;.log&#39;; 
* $txt = $info . "rnrn" . &#39;Set in &#39; . Date(&#39;h:i:s&#39;, time()) . (double)microtime() . "rn"; 
* $fp = fopen($log, &#39;w&#39;); 
* 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[&#39;flag&#39;])) 
{ 
$flag = intval($_GET[&#39;flag&#39;]); 
} 
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); 
} 
} 
} 
} 
}

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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();

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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;  
    }  
}

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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;//m.sbmmt.com/img/logo.jpg&#39;,&#39;//m.sbmmt.com/img/logo.jpg&#39;,&#39;//m.sbmmt.com/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++;  
}

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