NotNullValidator.php

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<?php
 
namespace Ubiquity\contents\validation\validators\basic;
 
use Ubiquity\contents\validation\validators\Validator;
 
class NotNullValidator extends Validator {
    
    public function __construct(){
        $this->message="This value should not be null";
    }
    public function validate($value) {
        return $value!==null;
    }
}