/** * @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['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); } } } } }
$thread = new thread(); $thread->addthread('func1','info1'); $thread->addthread('func2','info2'); $thread->addthread('func3','info3'); $thread->runthread();
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 $curl_setopt=array( 'CURLOPT_RETURNTRANSFER' => 1,//结果返回给变量 'CURLOPT_HEADER' => 0,//是否需要返回HTTP头 'CURLOPT_NOBODY' => 0,//是否需要返回的内容 'CURLOPT_FOLLOWLOCATION' => 0,//自动跟踪 'CURLOPT_TIMEOUT' => 6//超时时间(s) ); function __construct($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; } }
$curl_mul=new curl_multi(); $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。