php - VirtualDocumentRoot 运行良好，但没有对 $_SERVER ["DOCUMENT_ROOT"进行任何更改]

Question

我在 apache 上使用 VirtualDocumentRoot 指令来动态虚拟主机， 现在我的虚拟主机运行良好 但当我检查 $_SERVER["DOCUMENT_ROOT"] 的值 它仍然具有第一个 DocumentRoot 定义的值 不是 VirtualDocumentRoot 值!

我的“http.conf”文件的简短部分是:

UseCanonicalName Off
DocumentRoot "/var/www/html"

<VirtualHost *:80>
    ServerAdmin admin@localhost

    VirtualDocumentRoot "/var/vhosts/%0"

    ErrorLog "logs/dynamic-vhosts-error.log"
    CustomLog "logs/dynamic-vhosts-access.log" combined

</VirtualHost>

当我运行下面的 php 代码时

<?php
echo $_SERVER["DOCUMENT_ROOT"];
?>

我得到/var/www/html 结果。 如果我评论这一行

#DocumentRoot "/var/www/html"

PHP 结果将是

/etc/httpd/htdocs

但我希望 $_SERVER["DOCUMENT_ROOT"] 的值是这样的:

/var/vhosts/exampleDomain.com

有什么解决办法吗？

Answer 1

参见http://joshbenner.me/blog/quick-tip-get-proper-document-root-when-using-mod-vhost-alias/

I found a great solution to this in the related apache bug report: Simply add the following line to your apache configuration inside the VirtualDocumentRoot vhost definition:

php_admin_value auto_prepend_file /path/setdocroot.php

Then, create the referenced PHP file, and put set this as its contents:

<?php $_SERVER['DOCUMENT_ROOT'] = str_replace($_SERVER['SCRIPT_NAME'], '', $_SERVER['SCRIPT_FILENAME']);

Now, every page load has this file executed, which properly sets DOCUMENT_ROOT.