PHP多线程类及用法实例_php技巧
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 {
$fp=fsockopen($_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->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:
private $url_list=array();
private $curl_setopt=array(
'CURLOPT_RETURNTRANSFER' => 1,//结果返回给变量
'CURLOPT_HEADER' => 0,//是否需要返回HTTP头
'CURLOPT_NOBODY' => 0,//是否需要返回的内容
'CURLOPT_FOLLOWLOCATION' => 0,//自动跟踪
'CURLOPT_TIMEOUT' => 6//超时时间(s)
);
function __construct($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('/(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[$i]);//释放资源
}
curl_multi_close($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->setUrlList(array('http://www.jb51.net/img/logo.jpg','http://www.jb51.net/img/logo.jpg','http://www.jb51.net/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++;
}
希望本文所述对大家的PHP程序设计有所帮助。
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