php使用curl并发减少后端访问时间的方法分析

<" ", microtime());
  return ((float)$usec + (float)$sec);
}
$url_arr=array(
   "taobao"=>"http://www.taobao.com",
   "sohu"=>"http://www.sohu.com",
   "sina"=>"http://www.sina.com.cn",
   );
 $time_start = microtime_float();
 $data=array();
 foreach ($url_arr as $key=>$val)
 {
   $data[$key]=curl_fetch($val);
 }
 $time_end = microtime_float();
 $time = $time_end - $time_start;
 echo "耗时:{$time}";
"color: #ff0000">耗时:0.614秒

2、curl并发访问方式以及耗时统计


<"CURL Data Error");
  }
  /* get data */
  $nch = 0;
  foreach ($urlarr as $moudle=>$node) {
    if (($err = curl_error($ch[$nch])) == '') {
      $res[$nch]=curl_multi_getcontent($ch[$nch]);
      $result[$moudle]=$res[$nch];
    }
    else
    {
      error_log("curl error");
    }
    curl_multi_remove_handle($mh,$ch[$nch]);
    curl_close($ch[$nch]);
    ++$nch;
  }
  curl_multi_close($mh);
  return $result;
}
$url_arr=array(
   "taobao"=>"http://www.taobao.com",
   "sohu"=>"http://www.sohu.com",
   "sina"=>"http://www.sina.com.cn",
   );
function microtime_float()
{
  list($usec, $sec) = explode(" ", microtime());
  return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();
$data=curl_multi_fetch($url_arr);
$time_end = microtime_float();
$time = $time_end - $time_start;
 echo "耗时:{$time}";
"color: #ff0000">耗时:0.316秒

帅气吧整个页面访问后端接口的时间节省了一半
3、curl相关参数
curl_close — Close a cURL session

curl_copy_handle — Copy a cURL handle along with all of its preferences

curl_errno — Return the last error number

curl_error — Return a string containing the last error for the current session

curl_exec — Perform a cURL session

curl_getinfo — Get information regarding a specific transfer

curl_init — Initialize a cURL session

curl_multi_add_handle — Add a normal cURL handle to a cURL multi handle

curl_multi_close — Close a set of cURL handles

curl_multi_exec — Run the sub-connections of the current cURL handle

curl_multi_getcontent — Return the content of a cURL handle if CURLOPT_RETURNTRANSFER is set

curl_multi_info_read — Get information about the current transfers

curl_multi_init — Returns a new cURL multi handle

curl_multi_remove_handle — Remove a multi handle from a set of cURL handles

curl_multi_select — Wait for activity on any curl_multi connection

curl_setopt_array — Set multiple options for a cURL transfer

curl_setopt — Set an option for a cURL transfer

curl_version — Gets cURL version information
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