尝试创建匿名函数数组时出现语法错误[关闭]

Question

I am trying to realize my own MVC framework and invented a very nice way to provide definitions of virtual fields and additional relations.

According to some other high-voted post on stackoverflow, this should actually work:

class User extends Model {

  public $hasOne = array('UserSetting');

  public $validate = array();

  public $virtualFields = array(
      'fullname' => function () {
          return $this->fname . ($this->mname ? ' ' . $this->mname : '') . ' ' . $this->lname;
      },
      'official_fullname' => function () {

      }
  );
}

But it doesn't work. It says: Parse error: syntax error, unexpected T_FUNCTION. What am I doing wrong?

PS. talking about this one Can you store a function in a PHP array?

Answer 1

You must define the methods in the constructor, or some other method, not directly in the class member declaration.

class User extends Model {

  public $hasOne = array('UserSetting');

  public $validate = array();

  public $virtualFields = array();

  public function __construct() {
     $this->virtualFields = array(
        'fullname' => function () {
            return $this->fname . ($this->mname ? ' ' . $this->mname : '') . ' ' . $this->lname;
        },
        'official_fullname' => function () {

        }
    );
  }
}

While that works, PHP's magic method __get() is better suited to this task:

class User extends Model {

  public $hasOne = array('UserSetting');

  public $validate = array();

  public function __get($key) {
     switch ($key) {
       case 'fullname':
           return $this->fname . ($this->mname ? ' ' . $this->mname : '') . ' ' . $this->lname;
       break;

       case 'official_fullname':
         return '';
       break;
    };
  }
}