自定义404错误页面 - PHP [英] Custom 404 page - PHP
问题描述
我有一个自定义404页，除了我想要显示此页面上的消息，工作正常。
I have a custom 404 page which works fine except for the message I want to display on this page.
我想它说无法找到网页的网址，而是它显示的404页面的URL。
I would like it to say the url of the page which can't be found but instead it displays the url of the 404 page.
下面是我有...
您正在寻找＆LT; PHP的echo $ _ SERVER ['REQUEST_URI']＆GT;
htaccess的文件包含行：的ErrorDocument 404/404 /
The htaccess file contains the line: ErrorDocument 404 /404/
推荐答案
您需要使用 $ _ SERVER ['HTTP_REFERER'] 代替 - 这将是地址，但他们要求第一。
You need to use $_SERVER['HTTP_REFERER'] instead - that will be the address they requested first.
这只能在问题描述的确切情况的作品 - 在浏览器其实一直的重定向到的404页。在这种情况下， $ _ SERVER ['REQUEST_URI'] 包含404页的URI，而不是最初请求的页面描述。
This only works in the exact case described in the question - where the browser has actually been redirected to the 404 page. In that situation, $_SERVER['REQUEST_URI'] contains the URI of the 404 page rather than the originally requested page as described.
使用Apache的的ErrorDocument 404 /handle404.php 站点配置或的.htaccess 将意味着 $ _ SERVER ['REQUEST_URI'] 将实际工作，但更强大的解决方案是在下面的更新的选项。
Using Apache's ErrorDocument 404 /handle404.php in the site config or .htaccess would mean that $_SERVER['REQUEST_URI'] would actually work, but a more robust solution is the option in the update below.
显然 $ _ SERVER ['REDIRECT_URL'] 可能是一个更好的选择不过，在四处搜寻了一下。
Apparently $_SERVER['REDIRECT_URL'] might be a better bet however, having searched around a bit.
对于这两种情况，如下面的评论者，请记住，任何头也同样容易出现恶意内容 $提到_ POST ， $ _GET 和其他人，所以输出任何东西之前处理它们。
For both cases, as mentioned by the commenters below, bear in mind that any headers are just as prone to malicious content as $_POST, $_GET and others, so process them before outputting anything.
没看到@Janoz后下方 - 他正确地提到了 REDIRECT_URL
Didn't see the post from @Janoz below - he correctly mentions REDIRECT_URL.
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