Defining the email address for the Mail::send() method

问题

Apologies if I'm missing something here as I'm new to Laravel but when I send a closure to the Mail::send() method to define the mail recipient, it works fine if the email address is available the global scope, like this:

Mail::send('frontend.emails.default', $data, function($message) 
{
    $message->to(Input::get('email'))->subject('Hi');
});

But how can I pass a value in that's scoped to the calling method? For example:

$user = User::find($id);

Mail::send('frontend.emails.default', $data, function($message) 
{
    $message->to($user->email)->subject('Hi');
});

I tried adding it to the $data array but that's used in the view and isn't available in the callback.

Thanks for your help.

回答1:

There's a little documented feature in PHP that allows you to pass variables from the current scope into a closure. In short, you need to use ($user)...

$user = User::find($id);

Mail::send('frontend.emails.default', $data, function($message) use ($user)
{
    $message->to($user->email)->subject('Hi');
});

来源：https://stackoverflow.com/questions/16809254/defining-the-email-address-for-the-mailsend-method