使用条件将变量设置为True

Question

I have a function that checks if a user has the right privileges inside a repertory, and if the user does, i would like it to set a new variable : getprivileges = true

<?php
    $directory = $_SESSION['cwd'];                  // current directory
    $user = $_SESSION['simple_auth']['username'];   // get username
    $repository = gatorconf::get('repository');     // get base repertory of the file manager
    $userdir = $repository.DS.'user'.DS.$user;      // user's repertory

function scanDirectory($userdir = '', $directory){
    $folders = glob($userdir . '/*' , GLOB_ONLYDIR);
    foreach($folders as $folder){
        if (($folder == $directory && gator::checkPermissions('r')) || (gator::checkPermissions('ru')) || ($userdir == $directory && gator::checkPermissions('r'))) {
            $getprivileges = true;
            break;
        }
        scanDirectory($folder, $directory);
    }
}

scanDirectory($userdir, $directory);
?>

<?php if ($getprivileges == true): ?>
<p>Permissions granted.<p>
<?php endif; ?>

I believe the funtion return is what I am looking for but I don't really know how to use it. The last part of the code is just an exemple of what I am aiming to do with my variable.

I'm adding that so far my variable $getprivileges is not defined anywhere else in my code, so maybe I have to give it a default value first ?

Could someone give me some explanations on how i can do this ?

Thanks a lot

Solution Update from the comments :

<?php
    $directory = $_SESSION['cwd'];                  // current directory
    $user = $_SESSION['simple_auth']['username'];   // get username
    $repository = gatorconf::get('repository');     // get base repertory of the file manager
    $userdir = $repository.DS.'user'.DS.$user;      // user's repertory
    $getprivileges = scanDirectory($userdir, $directory);

function scanDirectory($userdir = '', $directory){
    $folders = glob($userdir . '/*' , GLOB_ONLYDIR);
    foreach($folders as $folder){
        if (($folder == $directory && gator::checkPermissions('r')) || (gator::checkPermissions('ru')) || ($userdir == $directory && gator::checkPermissions('r'))) {
            return true;
            break;
        }
        scanDirectory($folder, $directory);
    }
}

scanDirectory($userdir, $directory);
?>

<?php if ($getprivileges == true): ?>
<p>Permissions granted.<p>
<?php endif; ?>

Answer 1

I made this a community wiki because the author already figured out the solution.

---

You are correct that you need to use return. By using return, you can return some value as the value of the function call, and assign that value to a variable. In your case, you want to return either true or false.

Then you can set $getprivileges like so:

$getprivileges = scanDirectory($userdir, $directory);

Your function should look something like this:

function scanDirectory($userdir = '', $directory){
    $folders = glob($userdir . '/*' , GLOB_ONLYDIR);
    foreach($folders as $folder){
        if (($folder == $directory && gator::checkPermissions('r')) || (gator::checkPermissions('ru')) || ($userdir == $directory && gator::checkPermissions('r'))) {
            // Replaced here.
            return true;
        }
        scanDirectory($folder, $directory);
    }

    // Added here.
    return false;
}