如果没有登录到Joomla，拒绝访问与Joomla分开的文件

Question

I'm running Joomla 3.1 and I have an option in a custom component I've created that you can access when logged in to the Joomla admin backend that exports a CSV. It links to a PHP file that exports into a CSV (with a MIME type) and the data is personal and sensitive. Because this linked file is it's own separate entity, is there a way to include some PHP code at the beginning of this PHP file that checks if the user is logged in as an administrator and denies access if not?

Answer 1

Something like this:

if($admin){
    //allow access
} else {
    //deny access
}

$admin is a placeholder and needs to be replaced