Set an Apache subprocess_env variable
(PHP 4 >= 4.2.0, PHP 5)
Example 207. Setting an Apache environment variable using apache_setenv()
Code Examples / Notes » apache_setenv
When you want to set variables to pass to Server Side Includes (.shtml) included in PHP scripts, use this.
When you need to set the QUERY_STRING variable into a page included with the "virtual" function do this:
apache_setenv does not work for this case.
If you set a variable, either new or existing, the corresponding $_SERVER variable is not changed, and you will have to change it as well.
If you are using mod_gzip or mod_deflate to compress HTML output, you're not able to send partial file to the browser....
To disable mod_deflate in PHP (if needed), you can tell Apache with this :