Root directory with PHP on Apache and IIS

Question

Is there a $_SERVER['DOCUMENT_ROOT'] equivalent which would work on both Apache and IIS without having to change configuration files? Or maybe some workarounds?

The problem is that $_SERVER['DOCUMENT_ROOT'] does not work on IIS as I know and it's not a good idea to use it. Also I am searching for a solution which would work on lower versions of PHP as well (lower than PHP 5). — acoder
– acoder, Commented Feb 5, 2012 at 18:56
Maybe you could use the PHP function getcwd(); (PHP4/PHP5) and some logic to get what you need? — nickb
– nickb, Commented Feb 5, 2012 at 19:00
On some Unix variants, getcwd() will return FALSE if any one of the parent directories does not have the readable or search mode set, even if the current directory does. — acoder
– acoder, Commented Feb 5, 2012 at 19:07
I've worked with dozens of UNIX servers, some shared some independent, never has getcwd failed. You should be more focused on creating a viable solution instead of catering to exceptions that you'll likely never encounter. — nickb
– nickb, Commented Feb 5, 2012 at 19:26

v.tsurka · Accepted Answer · 2012-02-05 19:02:23Z

1

For IIS

if(empty($_SERVER['DOCUMENT_ROOT']) && !empty($_SERVER['SCRIPT_FILENAME'])) { 
  $_SERVER['DOCUMENT_ROOT'] = str_replace( '\\', '/', substr($_SERVER['SCRIPT_FILENAME'], 0, 0 - strlen($_SERVER['PHP_SELF'])));
} 
if(empty($_SERVER['DOCUMENT_ROOT']) && !empty($_SERVER['PATH_TRANSLATED'])) { 
  $_SERVER['DOCUMENT_ROOT'] = str_replace( '\\', '/', substr(str_replace('\\\\', '\\', $_SERVER['PATH_TRANSLATED']), 0, 0 - strlen($_SERVER['PHP_SELF'])));
}

answered Feb 5, 2012 at 19:02

v.tsurka

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