PHP $_SERVER['SERVER_NAME'] 正确使用
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PHP $_SERVER['SERVER_NAME'] correct use
提问by Kleber Stender
noob question here
菜鸟问题在这里
I'm building a interactive web site using php, and i decided to do one interative menu. Well, my menu consists in one file called menu.php.
我正在使用 php 构建一个交互式网站，我决定做一个交互式菜单。嗯，我的菜单包含在一个名为 menu.php 的文件中。
<?php
echo "<ul>
<li><a href='".$_SERVER['SERVER_NAME']."/menu/register.php'>Cadastro</a><br></li>
</ul>";
?>
I don't know why, but the when i click on this link it appears like that
我不知道为什么，但是当我单击此链接时，它看起来像那样
htpp://localhost/my_site/localhost/menu/register.php
htpp://localhost/my_site/ localhost/menu/register.php
EDIT: How can i delete that additional localhost?
编辑：如何删除额外的本地主机？
Thanks in advance
提前致谢
回答by Pekka
That is because you are not using the http://prefix. You would have to use
那是因为您没有使用http://前缀。你将不得不使用
<li><a href='http://".$_SERVER['SERVER_NAME']."/menu/register.php'></li>
(assuming http://is the only protocol your site can be on)
（假设http://是您的网站可以使用的唯一协议）
However, if you have a fixed site structure, consider using relative paths that work just as well, but with less headache:
但是，如果您有固定的站点结构，请考虑使用同样有效的相对路径，但不会让您头疼：
<li><a href='/menu/register.php'></li>
回答by Gumbo
$_SERVER['SERVER_NAME']contains just the name of the web server/virtual host:
$_SERVER['SERVER_NAME']仅包含 Web 服务器/虚拟主机的名称：
'SERVER_NAME'
The name of the server host under which the current script is executing. If the script is running on a virtual host, this will be the value defined for that virtual host.
'SERVER_NAME'
正在执行当前脚本的服务器主机的名称。如果脚本在虚拟主机上运行，这将是为该虚拟主机定义的值。
In your case it's localhost. And appending a path like /menu/register.phpto it results in the relative path:
在你的情况下，它是localhost. 并附加一个类似的路径/menu/register.php会导致相对路径：
localhost/menu/register.php
Now when you use that URI reference in a document that's base URI is http://localhost/my_site/(or a similar URI having the same path prefix), that relative path localhost/menu/register.phpgets resolved by the client to:
现在，当您在基本 URI 为http://localhost/my_site/（或具有相同路径前缀的类似 URI）的文档中使用该 URI 引用时，该相对路径localhost/menu/register.php由客户端解析为：
http://localhost/my_site/localhost/menu/register.php
That's the reason for the output you're getting.
这就是你得到输出的原因。
So what are you actually trying to accomplish?
那么你实际上想要完成什么？
回答by Quentin
Just use relative URIs.
只需使用相对 URI。
<li><a href='/menu/register.php'>Cadastro</a></li>
(You can ditch the <br>too. Use CSS padding if you want padding.)
（你也可以放弃<br>。如果你想要填充，请使用 CSS 填充。）
回答by azat
You must write like this:
你必须这样写：
echo "<ul>
<li><a href='http://".$_SERVER['SERVER_NAME']."/menu/register.php'>Cadastro</a><br></li>
</ul>";
Or simple
或者简单
echo "<ul>
<li><a href='/menu/register.php'>Cadastro</a><br></li>
</ul>";
回答by Orbit
You could just omit the
你可以省略
$_SERVER['SERVER_NAME']
and use relative pathing.
并使用相对路径。
回答by Deep Kapadia
good practice is not to use the server name in a href's
好的做法是不要在 href 中使用服务器名称
<a href="/menu/register.php">register</a>
or
或者
<a href="menu/register.php">register</a>
should work just fine
应该工作得很好
if you really needed to use the server name you could use:
如果您确实需要使用服务器名称，则可以使用：
<a href='http://".$_SERVER['SERVER_NAME']."/menu/register.php'>Cadastro</a>
the additional localhost is because the browser interprets it as a string and not a URL
额外的 localhost 是因为浏览器将其解释为字符串而不是 URL
回答by Nick Donley
I would also recommend using $_SERVER['HTTP_HOST'] over $_SERVER['SERVER_NAME'] that Ankur Kumar Singh said in a comment.
我还建议使用 $_SERVER['HTTP_HOST'] 而不是 Ankur Kumar Singh 在评论中所说的 $_SERVER['SERVER_NAME'] 。
<li><a href='".$_SERVER['HTTP_HOST']."/menu/register.php'>Cadastro</a><br></li>
<li><a href='".$_SERVER['HTTP_HOST']."/menu/register.php'>Cadastro</a><br></li>
This worked for me and got rid of the local host issue on my sites.
这对我有用并摆脱了我网站上的本地主机问题。
