CakePHP的：學習數瓊斯蛋糕論壇插件模型驗證規則，表單字段，===

Question

後，我有幾個問題在這裏：

1）是不是必須爲每個字段（出現在模型的驗證規則）成爲數據庫表中的字段？我在Cupcake論壇插件的用戶模型中找到了以下驗證規則。用戶表中的oldPassword和newPassword不是字段。我很困惑因爲我認爲我應該只對表格的字段進行驗證規則。

public $validate = array(
    'username' => array(
     'isUnique' => array(
      'rule' => 'isUnique', 
      'message' => 'That username has already been taken', 
      'on' => 'create' 
     ), 
     'notEmpty' => array(
      'rule' => 'notEmpty', 
      'message' => 'Please enter a username' 
     ) 
    ), 
    'password' => array(
     'rule' => 'notEmpty', 
     'message' => 'Please enter a password' 
    ), 
    'oldPassword' => array(
     'rule' => array('isPassword'), 
     'message' => 'The old password did not match' 
    ), 
    'newPassword' => array(
     'isMatch' => array(
      'rule' => array('isMatch', 'confirmPassword'), 
      'message' => 'The passwords did not match' 
     ), 
     'custom' => array(
      'rule' => array('custom', '/^[-_a-zA-Z0-9]+$/'), 
      'message' => 'Your password may only be alphanumeric' 
     ), 
     'between' => array(
      'rule' => array('between', 6, 20), 
      'message' => 'Your password must be 6-20 characters in length' 
     ), 
     'notEmpty' => array(
      'rule' => 'notEmpty', 
      'message' => 'Please enter a password' 
     ) 
    ), 
    'email' => array(
     'isUnique' => array(
      'rule' => 'isUnique', 
      'message' => 'That email has already been taken', 
      'on' => 'create' 
     ), 
     'email' => array(
      //'rule' => array('email', true),//boolean true as second parameter verifies that the host for the address is valid -- to be uncommented once website is uploaded 
      'rule' => array('email'), 
      'message' => 'Your email is invalid' 
     ), 
     'notEmpty' => array(
      'rule' => 'notEmpty', 
      'message' => 'Your email is required' 
     ) 
    ) 
); 

2）每個表單字段是否需要成爲數據庫表中的字段？

例如，當我要求用戶註冊時，會有：用戶名，電子郵件地址，密碼和確認密碼。但確認密碼字段不需要是表格中的字段吧？ 這是一個很好的做法嗎？

我發現form_app_model.php以下isMatch功能：

/** 
* Validates two inputs against each other 
* @access public 
* @param array $data 
* @param string $confirmField 
* @return boolean 
*/ 
public function isMatch($data, $confirmField) { 
    $data = array_values($data); 
    $var1 = $data[0]; 
    $var2 = (isset($this->data[$this->name][$confirmField])) ? $this->data[$this->name][$confirmField] : ''; 

    return ($var1 === $var2); 
} 

有人能告訴我什麼是在上面的代碼的最後一行===？

謝謝。

Answer 1

這意味着完全相同（沒有類型轉換）。例如：如果y = 25，那麼y === 25是正確的，y =='25'是正確的，但y ==='25'不正確。

Answer 2

==意味着等於

===意味着相同

http://www.techsww.com/tutorials/web_development/php/tips_and_tricks/difference_between_equal_and_identical_comparison_operators_php.php