CURL - 获取HTTP代码 [英] CURL - Getting HTTP code

问题描述

使用CURL获取网站的状态（如果网站上/下或重定向到其他网站）。我想尽可能精简，但是效果不好。

Im using CURL to get the status of a site, if its up/down or redirecting to another site. I want to get it as streamlined as possible, but it's not working well.

<?php
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

return $httpcode;
?>

我有一个函数。它工作正常，但性能不是最好的，因为它下载整个页面，如果我删除 $ output = curl_exec（$ ch）; 它返回 0 所有的时间。

I have this wrapped in a function. It works fine but performance is not the best because it downloads the whole page, thing in if I remove $output = curl_exec($ch); it returns 0 all the time.

有谁知道如何使性能更好？

Does anyone know how to make the performance better?

推荐答案

首先确保url是否真正有效（一个字符串，不是空的，好的语法），这是快速检查服务器端。例如，这样做可以节省很多时间：

first make sure if the url is actually valid (a string, not empty, good syntax), this is quick to check server side. for example, doing this first could save a lot of time:

if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i', $url)){
    return false;
}

请确保您只获取标题，而不是正文内容：

make sure you only fetch the headers, not the body content:

@curl_setopt($ch, CURLOPT_HEADER  , true);  // we want headers
@curl_setopt($ch, CURLOPT_NOBODY  , true);  // we don't need body

有关获取url状态的详细信息http代码我指的是另一个帖子我做了（它也有助于以下重定向）：

for more details on getting the url status http code I refer to another post I made (it also helps with following redirects):

• 检查PHP中是否存在URL

• check if an URL exists in PHP

作为一个整体：

$url = 'http://www.example.com';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, true);    // we want headers
curl_setopt($ch, CURLOPT_NOBODY, true);    // we don't need body
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo 'HTTP code: ' . $httpcode;

这篇关于CURL - 获取HTTP代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！