VirtualDocumentRoot运行良好，但不对$ _SERVER [“DOCUMENT_ROOT”]进行任何更改

Question

I use VirtualDocumentRoot directive for dynamice virtual hosts on apache, now my virtualhosts are working well but wen I check the value of $_SERVER["DOCUMENT_ROOT"] it still have the value of first DocumentRoot definition not VirtualDocumentRoot value !

the brief part of my "http.conf" file is:

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>

when I run this php code bellow

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

I get /var/www/html as result. If I comment this line

#DocumentRoot "/var/www/html"

the PHP result would be

/etc/httpd/htdocs

But I want the value of $_SERVER["DOCUMENT_ROOT"] be like this:

/var/vhosts/exampleDomain.com

Is there any solution for this?

Answer 1

see 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.