class - OOP PHP: Using parent's static element in declaration of child static element? -

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i'm trying write class uses parent's static declared array add new value to. below kind of feel of how i'm trying run it...

class superclass {  protected static $array_name = array('value1');  }  class subclass extends superclass  {  protected static $array_name = array_push(parent::$array_name, 'value2');  }

is there way implement without __construct() function?

i'm trying implement static working model superclass , parents...

i'm not entirely sure if want static classes completely, want give or take : 

<?php class superclass {     static $array_name = array('value1'); }  class subclass extends superclass {      static $array_name = 'foo';     function __construct(){          self::$array_name = array_push(parent::$array_name, 'value2');     } } $foo = new subclass(); var_dump($foo::$array_name);  // prints int 2 - push returns number of elements in array. ?>

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