php include file issue using document root
- by nithi
I have used the following code to get the document root.
$path = get_file_dir();
function get_file_dir() {
    global $argv;
    return realpath($argv[0]);
}
Below code includes config.php and config.php has the $setuprun variable with a value.
if((file_exists("$path/admin/config.php"))) {
 include_once "$path/admin/config.php"; 
}
if($setuprun=="true") { 
    //do some code
}
In my system, it takes the document root like /home/myname/myfolder and the variable $setuprun has the value and the code works perfectly.
But in another user's system, it shows the following error.
Notice:  Undefined variable: setuprun in /usr/local/www/chat/setup.php on line 22.
He is using FreeBSD 8.2 Stable with MySQL 5, PHP5 and Apache 2.2. 
Can anyone please help me to solve this error?