Portable and safe way to get PATH_INFO

Question

I\'m seeking a portable way to receive the (handy) $_SERVER[\'PATH_INFO\'] variable.

After reading a while, it turns out PATH_INFO

Answer 1

I didn't see the comments or the link before posting. Here is something that might work, based on what the page referenced above gives as CGI-derived variables:

function getPathInfo() {
    if (isset($_SERVER['PATH_INFO'])) {
        return $_SERVER['PATH_INFO'];
    }  

    $script_filename = $_SERVER["SCRIPT_FILENAME"];
    $script_name_start = strrpos($script_filename, "/");
    $script_name = substr($script_filename, $script_name_start);

    //With the above you should have the plain file name of script without path        

    $script_uri = $_SERVER["REQUEST_URI"];
    $script_name_length = strlen($script_name);
    $path_start = $script_name_length + strpos($script_name, $script_uri);

    //You now have the position of where the script name ends in REQUEST_URI

    $pathinfo = substr($script_uri, $path_start);
    return $pathinfo;
}