PHP form validation passes even though there is error - php

Question

I am trying to develop a form validation system. But the problem is even though there is no data given by users as required the validation passes. Can't figure out where the problem is.
This is my form validation class
class Validation
{
private $_passed = false,
$_errors = array(),
$_db = null;
public function __construct() {
$this->_db = DB::getInstance();
}
public function check($source, $items= array()) {
foreach ($items as $item => $rules) {
foreach ($rules as $rule => $rule_value) {
$value = $source[$item];
if ($rule === 'required' && empty($value)) {
$this->addError("{$item} is required");
} else {
}
}
}
if (empty($this->_errors)) {
$this->_passed = true;
}
return $this;
}
private function addError($error) {
$this->errors[] = $error;
}
public function errors() {
return $this->_errors;
}
public function passed() {
return $this->_passed;
}
}
And this is the form page containing Html form.
require_once 'core/init.php';
if (Input::exists()) {
$validate = new Validation();
$validation = $validate->check($_POST, array(
'username' => array(
'required' => true,
'min' => 2,
'max' => 20,
'unique' => 'users'
),
'password' => array(
'required' => true,
'matches' => 'password'
),
'password_again' => array(
'required' => true,
'min' => 6
),
'name' => array(
'required' => true,
'min' => 2,
'max' => 60
),
));
if ($validation->passed()) {
//register new user
echo "passed"; //this passes even though users provides no data
} else {
print_r($validation->errors());
}
}
So, all i get is echo passed on the screen even though user provide no data at all. It should throw the errors instead. Please help. Thanks

Answer 1

addError writes in $this->errors, while the other methods use $this->_errors. (with underscore). The _errors array will remain empty, so _passed will be set to true in this statement:
if (empty($this->_errors)) {
$this->_passed = true;
}