Laravel发送邮件后重定向无法显示成功提示问题

It looks like you’ve already narrowed down the issue nicely—since the alert shows up when you directly load the view with the success message, the problem is almost certainly related to how session flash data is being handled during the back() redirect. Let’s walk through the most common fixes:

1. Confirm Your Email Route Uses the Web Middleware #

Laravel’s session flash data (the type passed with ->with()) only works if the route is wrapped in the web middleware group, which manages session functionality.

Make sure your email submission route lives in routes/web.php (not api.php). By default, all routes in web.php automatically use the web middleware via the RouteServiceProvider, but if you’ve created a custom route group, double-check it includes the middleware:

// Correct (standard web.php route, no extra config needed)
Route::post('/send-email', 'SendEmailController@send');

// If using a custom group, ensure web middleware is present
Route::middleware('web')->group(function () {
    Route::post('/send-email', 'SendEmailController@send');
});

2. Simplify Your View’s Session Check #

Instead of using the Session facade, try Laravel’s session() helper function—it’s more concise and avoids potential facade resolution hiccups:

@if(session('success'))
    <div class="alert alert-success alert-block">
        <button type="button" class="close" data-dismiss="alert">×</button>
        <strong>{{ session('success') }}</strong>
    </div>
@endif

3. Clear Stale Cache and Session Data #

Sometimes cached data or leftover session entries can interfere with flash messages. Run these commands in your terminal to reset things:

php artisan cache:clear
php artisan session:clear
php artisan view:clear

4. Debug Session Contents (Temporarily) #

To verify if the flash data is actually being passed to the form page, add this line temporarily at the top of index.blade.php to dump all session data:

{{ dd(session()->all()) }}

If you don’t see the success key in the output, that confirms the redirect isn’t persisting the flash data—circle back to checking the middleware on your submission route.

5. Try Explicit Redirect Instead of back() #

Ambiguity in where back() is pointing could be causing issues. Replace back() with an explicit redirect to your form route:

// Use a named route if you’ve defined one
return redirect()->route('form.index')->with('success', 'Mail Sent !');

// Or direct URL path
return redirect('/')->with('success', 'Mail Sent !');

Since your direct view load works, the core alert code is solid—this is just about getting the flash data to stick through the redirect. Any of these steps should resolve the issue.

内容的提问来源于stack exchange，提问作者Dogasp