From PHP, check if Apache variable is defined (same as IfDefine in .htaccess)

Question

How can I check with PHP if an Apache variable is defined? This .htaccess

is checked using IfDefine.

When starting Apache, I define a variable: on Windows with

httpd.exe -D "MYVARIABLE" -w -n "Apache2.2" -k start

and in Ubuntu adding to /etc/apache2/envvars

:

export APACHE_ARGUMENTS='-D MYVARIABLE'

Now I can use it in .htaccess

like

<IfDefine MYVARIABLE>
    do stuff
</IfDefine>

and it works.

How can I test this in PHP? I tried

if (getenv ('MYVARIABLE')) do stuff;
if (apache_getenv ('MYVARIABLE')) do stuff;

but it always returns FALSE

.

phpinfo ();

prints a lot of things, but there is no line in its output MYVARIABLE

.

+3

Alexander gelbukh May 21 '15 @ 2:28 am

1 answer

Alexander gelbukh · Accepted Answer · 2015-05-21T02:50:00+0000

Thanks to mario's comment, I think the answer is:

On Windows there is probably no way for a variable to be set as a command line argument like

httpd.exe -D "MYVARIABLE" -w -n "Apache2.2" -k start

On Linux / Ubuntu, if installed /etc/apache2/envvars

as

export APACHE_ARGUMENTS='-D MYVARIABLE'

then from PHP

$x = getenv ('APACHE_ARGUMENTS')

gives -D MYVARIABLE

from which you can use strstr ($x, 'MYVARIABLE')

or so to find the variable.