使用条件设置为True

Question

一个变量我有检查，如果用户有一个剧目中的权利的特权，如果用户确实，我想它设定新的变量的函数：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; ?> 

我相信功能return是我正在寻找，但我真的不知道如何使用它。 代码的最后部分仅仅是我打算对变量做的一个例子。

我添加了，到目前为止我的变量$ getprivileges没有在我的代码中的其他地方定义，所以也许我必须先给它一个默认值？

有人可以给我一些解释我如何做到这一点？

非常感谢

解决方案更新从注释：

<?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

我这个做了一个社区维基因为作者已经想出了解决方案。

---

你是对的，你需要使用return。通过使用return，您可以返回某个值作为函数调用的值，并将该值分配给一个变量。在你的情况下，你想返回true或false。

然后你可以设置$getprivileges像这样：

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

你的函数应该是这个样子：

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; 
}