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:
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- 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['HTTP_HOST'],$_SERVER['SERVER_PORT']);
- if($fp)
- {
- $out = "GET {$_SERVER['PHP_SELF']}?flag=$i HTTP/1.1rn";
- $out .= "Host: {$_SERVER['HTTP_HOST']}rn";
- $out .= "Connection: Closernrn";
- fputs($fp,$out);
- fclose($fp);
- }
- }
- }
- }
- }
使用方法,代码如下:
- $thread = new thread();
- $thread->addthread('func1','info1');
- $thread->addthread('func2','info2');
- $thread->addthread('func3','info3');
- $thread->runthread();
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 $curl_setopt=array(
- 'CURLOPT_RETURNTRANSFER' => 1,
- 'CURLOPT_HEADER' => 0,
- 'CURLOPT_NOBODY' => 0,
- 'CURLOPT_FOLLOWLOCATION' => 0,
- 'CURLOPT_TIMEOUT' => 6
- );
- function __construct($seconds=30){
- set_time_limit($seconds);
- }
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- public function setUrlList($list=array()){
- $this->url_list=$list;
- }
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- public function setOpt($cutPot){
- $this->curl_setopt=$cutPot+$this->curl_setopt;
- }
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- 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('/(CURLOPT_w{1,})/ie','$0',$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[$i]);
- }
- curl_multi_close($mh);
- return $res;
- }
- }
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('http://www.phpfensi.com/img/logo.jpg','http://www.phpfensi.com/img/logo.jpg','http://www.phpfensi.com/img/logo.jpg'));
- $a=$curl_mul->execute();
- $i=1;
- foreach($a as $v){
- $filename=$i.'.gif';
- $fp2=@fopen($filename,'a');
- fwrite($fp2,$v);
- fclose($fp2);
- $i++;
- }
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