error in Validation class / check method (for HTML form)

Hello,
I have a Validation class here, where I validate user input from a HTML form.

I have an array of presettings that I pass to a check method of the Validation class. I first of all check if the input fields are empty or not, also checking there with the help of the presettings array if it is required that the field must not be empty. If an field is empty, I pass an error-message to the an error-Array. If no field is empty I give out: "Passed"

That check method works fine, the only thing is when the first input field "username" is not empty, it doesn't check the other fields anymore and gives out "passed" immediately.

Does anybody see the error here? Thank's a lot!

register.php:

require_once 'core/init.php';

if(Input::exists()) {
  
   $validate = new Validate();
    $validate->check($_POST,array(

        'username' => array(

            'required' => true,
            'min' => 2,
            'max' => 20,
            'unique' => 'users'
        ),
        'password' => array(
            'required' => true,
            'min' => 6

        ),
        'password_again' => array(
            'required' => true,
            'matches' => 'password'

        ),
        'name' => array(
            'required' => true,
            'min' => 2,
            'max' => 50
        )
   ));

   if($validate->passed()) {

        echo 'Passed';
  
    } else {

        print_r($validate->errors());
    }
}

?>

<form action="" method="POST">
    <div class="field">
        <label for="username">Username</label>
        <input type="text" name="username" id="username"/>

    </div>
    <div class="field">
        <label for="password">Choose a password</label>
        <input type="password" name="password" id="password"/>
    </div>
     <div class="field">
        <label for="password_again">Enter your password again</label>
        <input type="password" name="password_again" id="password_again"/>
    </div>
     <div class="field">
        <label for="name">Enter your Name</label>
        <input type="text" name="name" id="name"/>
    </div>
        <input type="submit" value="Register"/>

</form>

PHP:

Validate.php:

class Validate {

    private $_passed = false,
            $_errors = array(),
            $_db = null;

    public function __construct() {

        $this->_db = DB::getInstance();
    }  
   
    public function check($source, $items = []) {

        foreach($items as $item => $rules) {

            foreach($rules as $rule => $rule_value) {
               
                $value = $source[$item];

                if($rule === 'required' && empty($value)) {

                   $this->addError("{$item} is required");

                //  echo $item." = ".$value."<br/>";
                }

            }

            if(empty($this->_errors)) {

                $this->_passed = true;
            }

        }

    }
    private function addError($error) {
        $this->_errors[] = $error;

    }

    public function errors() {
        return $this->_errors;
    }


    public function passed() {

        return $this->_passed;


    }
}

PHP:

 

I got it,
if(empty($this->_errors)) {$this->_passed = true; } must be in outer and not inner loop.