Call to undefined function validation ()

Call to undefined function validation () - Printable Version

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+--- Thread: Call to undefined function validation () (/showthread.php?tid=79503)

Call to undefined function validation () - lucavalentino - 06-25-2021

I am converting to codeigniter 4
In a sub view I want to show all the errors of the form. In codeigniter 3 I was using validator_errors without problems

In the BaseController I loaded the Validation livery

PHP Code:
$this->validation = \Config\Services::validation (); 

In the subview it is, while the errors see exist:

PHP Code:
if (! empty (validation () -> listErrors ()))
    echo validation () -> listErrors 

I get the error

Code:
Call to undefined function validation ()

RE: Call to undefined function validation () - berendbotje91 - 06-25-2021

If you want to show validation errors in a view, you need to pass validation() as a variable to the view and then call it like

Code:
<?= $validation->listErrors() ?>

https://codeigniter.com/user_guide/libraries/validation.html?highlight=validation#form-validation-tutorial

RE: Call to undefined function validation () - lucavalentino - 06-25-2021

I tried as suggested but still get the same error .

In the BaseController I loaded the Validation library
$validation = \Config\Services::validation ();

I want to autoload the library validation

RE: Call to undefined function validation () - lucavalentino - 06-25-2021

Base Controller

PHP Code:
<?php

namespace App\Controllers;

use CodeIgniter\Controller;
use CodeIgniter\HTTP\CLIRequest;
use CodeIgniter\HTTP\IncomingRequest;
use CodeIgniter\HTTP\RequestInterface;
use CodeIgniter\HTTP\ResponseInterface;
use Psr\Log\LoggerInterface;


/**
* Class BaseController
*
* BaseController provides a convenient place for loading components
* and performing functions that are needed by all your controllers.
* Extend this class in any new controllers:
*    class Home extends BaseController
*
* For security be sure to declare any new methods as protected or private.
*/

class BaseController extends Controller
{
/**
* Instance of the main Request object.
*
* @var IncomingRequest|CLIRequest
*/
protected $request;

/**
* An array of helpers to be loaded automatically upon
* class instantiation. These helpers will be available
* to all other controllers that extend BaseController.
*
* @var array
*/
protected $helpers = ['my_redirect', 'url'];

/**
* Constructor.
*
* @param RequestInterface  $request
* @param ResponseInterface $response
* @param LoggerInterface  $logger
*/
public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
{
// Do Not Edit This Line
parent::initController($request, $response, $logger);

//--------------------------------------------------------------------
// Preload any models, libraries, etc, here.
//--------------------------------------------------------------------
// E.g.: 
$this->session = \Config\Services::session();
$validation =  \Config\Services::validation();

}

} 

PHP Code:
namespace App\Controllers;

use CodeIgniter\Controller;

class Login extends BaseController
{
public function index()
{
$data=['title'=>'login', 'menu'=>'si'];
return view('login_v', $data);
}
} 

PHP Code:
$this->include('_mesages_v', $data); 

...
_mesages_v view

PHP Code:
...
 if(!empty($validation->listErrors()))

  echo validation()->listErrors();
... 

ERROR Undefined variable $validation

RE: Call to undefined function validation () - superior - 06-25-2021

Looks like you aren't sending $validation to the view, that would explain the undefined variable message.

File: _messages_v

RE: Call to undefined function validation () - paulbalandan - 06-25-2021

$data['validation'] = $this-validation;
view('login', $data);

// view
if ($validation->listErrors())

RE: Call to undefined function validation () - Gary - 06-26-2021

$this->validation and $validation likely point to different things in your case.

Try using $this-> in all cases to reference the current instance of it... or using a local variable as a handle to the service that is then passed $this instance:

Code:
$validation = \Config\Services::validation();

...

$validationResult = $this->validate('validation_test');   // bool result

if ($validationResult) {

   // no validation errors

} else 

   $validationErrors = $validation->getErrors();

// or $validation->getError('validation_test_specific_test_error');

Can be called in the View, if desired:
echo $validation->getError('validation_test_specific_test_error');