PHP

validation in laravel

use IlluminateSupportFacadesValidator;
 
class PostController extends Controller
{
    /**
     * Store a new blog post.
     *
     * @param  Request  $request
     * @return Response
     */
    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'title' => 'required|unique:posts|max:255',
            'body' => 'required',
        ]);
 
        if ($validator->fails()) {
            return redirect('post/create')
                        ->withErrors($validator)
                        ->withInput();
        }
 
        // Retrieve the validated input...
        $validated = $validator->validated();
 
        // Retrieve a portion of the validated input...
        $validated = $validator->safe()->only(['name', 'email']);
        $validated = $validator->safe()->except(['name', 'email']);
 
        // Store the blog post...
    }
}

laravel custom validation exception

// In the controller
throw IlluminateValidationValidationException::withMessages([
    "one_thing" => ["Validation Message #1"], 
    "another_thing" => ['Validation Message #2']
]);

laravel validation

$this->validate([ // 1st array is field rules
  'userid' =>'required|min:3|max:100',
  'username' =>'required|min:3',
  'password' =>'required|max:15|confirmed',
], [ // 2nd array is the rules custom message
  'required' => 'The :attribute field is mandatory.'
], [ // 3rd array is the fields custom name
  'userid' => 'User ID'
]);

custom rule laravel validation

public function store()
{
    $this->validate(request(), [
        'song' => [function ($attribute, $value, $fail) {
            if ($value <= 10) {
                $fail(':attribute needs more cowbell!');
            }
        }]
    ]);
}

laravel validation

use IlluminateSupportFacadesValidator;


$customMessage = [
  'title.max' => "title is too large",
];
$rules = [
  'id' => 'integer|exists:master_advert_bundles',
  'title' => ['required', 'unique:posts', 'max:255'],
  'body' => ['required']
];
$validate = validation($request->all(), $rules);
$validate = Validator::make($request->all(), $rules, $customMessage);
if ($validate->fails()) {
  return  $validate->messages();
}

laravel custom validation message

$rules = [
        'name' => 'required',
        'email' => 'required|email',
        'message' => 'required|max:250',
    ];

    $customMessages = [
        'required' => 'The :attribute field is required.'
    ];

    $this->validate($request, $rules, $customMessages);

Laravel Validation

    $validated = $request->validate([
        'title' => 'required|unique:posts|max:255',
        'body' => 'required',
    ]);

validation laravel

/**
 * Store a new blog post.
 *
 * @param  IlluminateHttpRequest  $request
 * @return IlluminateHttpResponse
 */
public function store(Request $request)
{
    $validated = $request->validate([
        'title' => 'required|unique:posts|max:255',
        'body' => 'required',
    ]);
 
    // The blog post is valid...
}

Laravel validation

public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'title' => 'required|unique:posts|max:255',
            'body' => 'required',
        ]);
 
        if ($validator->fails()) {
            return redirect('post/create')
                        ->withErrors($validator)
                        ->withInput();
        }
 
        // Retrieve the validated input...
        $validated = $validator->validated();
 
        // Retrieve a portion of the validated input...
        $validated = $validator->safe()->only(['name', 'email']);
        $validated = $validator->safe()->except(['name', 'email']);
 
        // Store the blog post...
    }

laravel custom validation rules

php artisan make:rule Uppercase

laravel custom validation

php artisan make:rule RuleName

laravel validation

use IlluminateValidationRule;

Validator::make($data, [
    'email' => [
        'required',
        Rule::unique('users')->ignore($user->id),
    ],
]);

how to make custom validator in laravel

generate a new rule object, by using the make:rule Artisan command.
  Let's use this command to generate a rule that verifies a string is 
  uppercase. Laravel will place the new rule in the app/Rules directory.
  If this directory does not exist, Laravel will create it when you 
  execute the Artisan command to create your rule:
  
  php artisan make:rule Uppercase
  
  go to https://laravel.com/docs/8.x/validation#custom-validation-rules
  for details

laravel validation

/**
 * Bootstrap any application services.
 *
 * @return void
 */
public function boot()
{
    Validator::extend(...);

    Validator::replacer('foo', function ($message, $attribute, $rule, $parameters) {
        return str_replace(...);
    });
}

laravel validation

'foo.*.id' => 'distinct'

laravel custom validation

namespace AppRules;

use IlluminateContractsValidationRule;

class GreaterThanTen implements Rule
{
    // Should return true or false depending on whether the attribute value is valid or not.
    public function passes($attribute, $value)
    {
        return $value > 10;
    }

    // This method should return the validation error message that should be used when validation fails
    public function message()
    {
        return 'The :attribute must be greater than 10.';
    }
}

Laravel validation rule

Accepted
Accepted If
Active URL
After (Date)
After Or Equal (Date)
Alpha
Alpha Dash
Alpha Numeric
Array
Bail
Before (Date)
Before Or Equal (Date)
Between
Boolean
Confirmed
Current Password
Date
Date Equals
Date Format
Declined
Declined If
Different
Digits
Digits Between
Dimensions (Image Files)
Distinct
Email
Ends With
Enum
Exclude
Exclude If
Exclude Unless
Exclude With
Exclude Without
Exists (Database)
File
Filled
Greater Than
Greater Than Or Equal
Image (File)
In
In Array
Integer
IP Address
JSON
Less Than
Less Than Or Equal
MAC Address
Max
MIME Types
MIME Type By File Extension
Min
Multiple Of
Not In
Not Regex
Nullable
Numeric
Password
Present
Prohibited
Prohibited If
Prohibited Unless
Prohibits
Regular Expression
Required
Required If
Required Unless
Required With
Required With All
Required Without
Required Without All
Required Array Keys
Same
Size
Sometimes
Starts With
String
Timezone
Unique (Database)
URL
UUID

laravel validation

Validator::extendImplicit('foo', function ($attribute, $value, $parameters, $validator) {
    return $value == 'foo';
});

laravel validation

Rule::unique('users')->ignore($user->id, 'user_id')

laravel validation

Validator::extend('foo', 'FooValidator@validate');

laravel validation

Rule::unique('users')->ignore($user)

laravel validation

"foo" => "Your input was invalid!",

"accepted" => "The :attribute must be accepted.",

// The rest of the validation error messages...

laravel validation

$rules = ['name' => 'unique:users,name'];

$input = ['name' => ''];

Validator::make($input, $rules)->passes(); // true