How to handle form submissions and validation errors in Blade templates in Laravel?

To handle form submissions and validation errors in Blade templates in Laravel, follow these steps:

Create a form in your Blade template using the form helper provided by Laravel. For example:

<form method="POST" action="/submit">
    @csrf
    <div class="form-group">
        <label for="name">Name</label>
        <input type="text" name="name" class="form-control">
        @error('name')
            <span class="text-danger">{{ $message }}</span>
        @enderror
    </div>
    <div class="form-group">
        <label for="email">Email</label>
        <input type="email" name="email" class="form-control">
        @error('email')
            <span class="text-danger">{{ $message }}</span>
        @enderror
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
</form>

In your Laravel route file (web.php), define the route to handle the form submission and validation. For example:

use Illuminate\Http\Request;

Route::post('/submit', function (Request $request) {
    $validatedData = $request->validate([
        'name' => 'required|min:2|max:255',
        'email' => 'required|email|max:255',
    ]);
    
    // Perform other logic or save data
    
    return redirect('/success');
});

In your Blade template, you can display the success message or any other response using the session flash data. For example:

@if (session('success'))
    <div class="alert alert-success">
        {{ session('success') }}
    </div>
@endif

To handle server-side validation errors, you can use the @error directive provided by Laravel. If there are any validation errors, the error message will be displayed next to the corresponding input field.
You can also pre-fill the form fields with the old input by using the old helper provided by Laravel. For example:

<input type="text" name="name" class="form-control" value="{{ old('name') }}">

This will populate the input field with the value entered by the user if there is a validation error.

By following these steps, you can handle form submissions and display validation errors in your Blade templates in Laravel.