/**  * http请求处理类（基于CURL进行封装）  *  * @author Xiwei Ye  * @version $Id$  */  class cls_http_request  {  /**  * get方式请求（curl）  *  * @param string $url 请求的url  * @param integer $timeout 超时时间（s）  * @return string(请求成功) | false(请求失败)  */  public static function curl_get($url, $timeout = 1)  {  $ch = curl_init();  curl_setopt($ch, CURLOPT_URL, $url);  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);  $result = curl_exec($ch);  curl_close($ch);  if (is_string($result) && strlen($result))  {  return $result;  }  else  {  return false;  }  }  /**  * post方式请求  *  * @param string $url 请求的url  * @param array $data 请求的参数数组（关联数组）  * @param integer $timeout 超时时间（s）  * @return string(请求成功) | false(请求失败)  */  public static function curl_post($url, $data, $timeout = 2)  {  $ch = curl_init();  curl_setopt($ch, CURLOPT_URL, $url);  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  curl_setopt($ch, CURLOPT_POST, 1);  curl_setopt($ch, CURLOPT_POSTFIELDS, $data);  curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);  curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);  $result = curl_exec($ch);  curl_close($ch);  if (is_string($result) && strlen($result))  {  return $result;  }  else  {  return false;  }  }  /**  * 多个url并行请求  *  * @param array $urls url数组  * @param integer $timeout 超时时间(s)  * @return array $res 返回结果  */  public static function curl_get_urls($urls, $timeout = 1)  {  $mh=curl_multi_init();  $chs=array();  foreach($urls as $url)  {  $ch=curl_init();  curl_setopt($ch,CURLOPT_URL,$url);  curl_setopt($ch,CURLOPT_HEADER,false);  curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);  curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,1);  curl_setopt($ch,CURLOPT_TIMEOUT,$timeout);  curl_multi_add_handle($mh,$ch);  $chs[]=$ch;  }  $active=null;  do {  $mrc=curl_multi_exec($mh,$active);  }while($mrc == CURLM_CALL_MULTI_PERFORM);  while($active && $mrc == CURLM_OK)  {  if(curl_multi_select($mh) != -1)  {  do{  $mrc=curl_multi_exec($mh,$active);  }while($mrc == CURLM_CALL_MULTI_PERFORM);  }  }  $res=array();  foreach($chs as $ch)  {  $res[]=curl_multi_getcontent($ch);  curl_multi_remove_handle($mh,$ch);  }  curl_multi_close($mh);  return $res;  }  }