使用pthreads实现真正的PHP多线程（需PHP5.3以上版本）

<?phpclass test_thread_run extends Thread {public $url;public $data;public function __construct($url){$this->url = $url;}public function run(){if(($url = $this->url)){$this->data = model_http_curl_get($url);}}}function model_thread_result_get($urls_array) {//启动多线程foreach ($urls_array as $key => $value) {$thread_array[$key] = new test_thread_run($value["url"]);$thread_array[$key]->start();}foreach ($thread_array as $thread_array_key => $thread_array_value) {//等待线程执行完成while($thread_array[$thread_array_key]->isRunning()){usleep(10);}//收集结果if($thread_array[$thread_array_key]->join()){$variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data;}}return $variable_data;}function model_http_curl_get($url,$userAgent="") {$userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)'; $curl = curl_init();curl_setopt($curl, CURLOPT_URL, $url);curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);curl_setopt($curl, CURLOPT_TIMEOUT, 5);curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);$result = curl_exec($curl);curl_close($curl);return $result;}for ($i=0; $i < 100; $i++) { $urls_array[] = array("name" => "baidu", "url" => "http://www.baidu.com/s?wd=".mt_rand(10000,20000));}$t = microtime(true);$result = model_thread_result_get($urls_array);$e = microtime(true);echo "多线程：".($e-$t);$t = microtime(true);foreach ($urls_array as $key => $value) {$result_new[$key] = model_http_curl_get($value["url"]);}$e = microtime(true);echo "For循环：".($e-$t);?>