How to declare a static array in an array?

Question

My code:

class User
    {
        protected static $config = array(
            'expiration'    => 0,       
        );

        protected static $Db;

        protected static $user = array();
                  static::$user['data'] = array();
                  static::$user['meta'] = array();
                  static::$user['controls'] = array();

Here I will get this error:

Parse error: syntax error, unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM), expecting variable (T_VARIABLE)

by complaining this:

`static::$user['data'] = array()`

How can I declare static::$user['data'] here?

You can't declare a static variable inside an array. The initial array will be static so you wouldn't need to make its key values static anyway. — Rwd
– Rwd, Commented Aug 22, 2017 at 11:46

Death-is-the-real-truth · Accepted Answer · 2017-08-22 11:53:25Z

1

A static array variable don't need to explicitly make it's key=>value static too, because it will be taken care automatically.

You need to do like this:-

self::$user['data'] = array();
self::$user['meta'] = array();
self::$user['controls'] = array();

answered Aug 22, 2017 at 11:53

Death-is-the-real-truth

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Comments

B. Desai · Accepted Answer · 2017-08-22 11:53:18Z

1

You already have define $user as static so you don't need to declare its elements as static again. If you want to initialize it. You can achieve it by method like below:

class User
    {
        protected static $config = array(
            'expiration'    => 0,       
        );

        protected static $Db;

        protected static $user = array();        
        public static function get_user()
        {
          self::$user['data'] = array();
          self::$user['meta'] = array();
          self::$user['controls'] = array();
          return self::$user;
        }

}
$user = User::get_user();
var_dump($user);

answered Aug 22, 2017 at 11:53

B. Desai

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2 Comments

Progrock Over a year ago

Slightly confusing, as every time you get_user, you'll be clobbering User::$user.

B. Desai Over a year ago

Its just an example. initialization can be done in other function also.

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