检查链接是否在php中损坏 [英] Check if links are broken in php

问题描述

我想知道是否有任何好的PHP脚本(库)来检查链接是否断开?我有一个指向mysql表中文档的链接，并且可能只是检查该链接是否指向该文档，或者是否将我重定向到了另一个URL.任何的想法?我更喜欢用PHP来做.

I wonder if there is any good PHP script (libraries) to check if link are broken? I have links to documents in a mysql table and could possibly just check if the link leads to a the document, or if I am redirected to anther url. Any idea? I would prefer to do it in PHP.

可能与以下内容有关: 检查链接是否有效，如果不能从视觉上将其标识为坏了

Might be related to: Check link works and if not visually identify it as broken

推荐答案

您可以使用以下功能检查链接是否断开:

You can check for broken link using this function:

function check_url($url) {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch , CURLOPT_RETURNTRANSFER, 1);
    $data = curl_exec($ch);
    $headers = curl_getinfo($ch);
    curl_close($ch);

    return $headers['http_code'];
}

您需要安装CURL才能正常工作.现在，您可以使用以下方法检查断开的链接:

You need to have CURL installed for this to work. Now you can check for broken links using:

$check_url_status = check_url($url);
if ($check_url_status == '200')
   echo "Link Works";
else
   echo "Broken Link";

也请检查此链接以获取HTTP状态代码: HTTP状态代码

Also check this link for HTTP status codes : HTTP Status Codes

我想您也可以检查301和302状态代码.

I think you can also check for 301 and 302 status codes.

另外一种方法是使用get_headers函数.但这仅在您的PHP版本大于5时有效:

Also another method would be to use get_headers function . But this works only if your PHP version is greater than 5 :

function check_url($url) {
   $headers = @get_headers( $url);
   $headers = (is_array($headers)) ? implode( "\n ", $headers) : $headers;

   return (bool)preg_match('#^HTTP/.*\s+[(200|301|302)]+\s#i', $headers);
}

在这种情况下，只需检查输出:

In this case just check the output :

if (check_url($url))
   echo "Link Works";
else
   echo "Broken Link";

希望这对您有帮助:).

Hope this helps you :).

这篇关于检查链接是否在php中损坏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！