Laravel - Validation
By default, base controller class uses a ValidatesRequests trait which provides a convenient method to validate incoming HTTP requests with a variety of powerful validation rules.
Available Validation Rules in Laravel
it is important to note that a $errors variable will always be available in all of your views on every request, allowing you to conveniently assume the $errors variable is always defined and can be safely used.| Available Validation Rules in Laravel | ||
|---|---|---|
| Accepted | Active URL | After (Date) |
| Alpha | Alpha Dash | Alpha Numeric |
| Array | Before (Date) | Between |
| Boolean | Confirmed | Date |
| Date Format | Different | Digits |
| Digits Between | Exists (Database) | |
| Image (File) | In | Integer |
| IP Address | JSON | Max |
| MIME Types(File) | Min | Not In |
| Numeric | Regular Expression | Required |
| Required If | Required Unless | Required With |
| Required With All | Required Without | Required Without All |
| Same | Size | String |
| Timezone | Unique (Database) | URL |
@if (count($errors) > 0) <div class = "alert alert-danger"> <ul> @foreach ($errors->all() as $error) <li>{{ $error }}</li> @endforeach </ul> </div> @endif
Example
Step 1 − Create a controller called ValidationController by executing the following command.
php artisan make:controller ValidationController --plain
Step 2 − After successful execution, you will receive the following output −
Step 3 − Copy the following code in
app/Http/Controllers/ValidationController.php file.
app/Http/Controllers/ValidationController.php
<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Http\Requests; use App\Http\Controllers\Controller; class ValidationController extends Controller { public function showform(){ return view('login'); } public function validateform(Request $request){ print_r($request->all()); $this->validate($request,[ 'username'=>'required|max:8', 'password'=>'required' ]); } }
Step 4 − Create a view file called resources/views/login.blade.php and copy the following code in that file.
resources/views/login.blade.php
<html> <head> <title>Login Form</title> </head> <body> @if (count($errors) > 0) <div class = "alert alert-danger"> <ul> @foreach ($errors->all() as $error) <li>{{ $error }}</li> @endforeach </ul> </div> @endif <?php echo Form::open(array('url'=>'/validation')); ?> <table border = '1'> <tr> <td align = 'center' colspan = '2'>Login</td> </tr> <tr> <td>Username</td> <td><?php echo Form::text('username'); ?></td> </tr> <tr> <td>Password</td> <td><?php echo Form::password('password'); ?></td> </tr> <tr> <td align = 'center' colspan = '2' ><?php echo Form::submit('Login'); ? ></td> </tr> </table> <?php echo Form::close(); ?> </body> </html>
Step 5 − Add the following lines in app/Http/routes.php.
app/Http/routes.php
Route::get('/validation','ValidationController@showform');
Route::post('/validation','ValidationController@validateform');
Step 6 − Visit the following URL to test the validation.
http://localhost:8000/validation
Step 7 − Click the Login button without entering anything in the text field. The output will be as shown in the following image.
