如何用非静态方法覆盖静态方法？

Question

How to override static methods with non static methods?

code

class Env {
    static protected $vars = [
    ];

    static public function get_env_var($var){
        return self::$vars[$var];
    }

    static public function set_env_var($var, $value){
        self::$vars[$var] = $value;
    }
}

class Test extends Env {
    private $env_vars = [];

    public function __construct(){
        $this->env_vars = self::$vars;
    }

    public function get_env_var($var){
        return $this->env_vars[$var];
    }

    public function set_env_var($var, $value){
        $this->env_vars[$var] = $value;
    }
}

$Test = new Test();

error

Cannot make static method Env::get_env_var() non static in class Test in

Answer 1

You can't.

If you defined them as static before, you had valid reasons.

Answer 2

Original question was how to override static method to non static. Your answer is not the answer for the question, because child is still static.

You can't override a static method with a non static.

Answer 3

public static function get_env_var($var)

Answer 4

class Parent
{
    public static function start()
    {
        echo 'Parent::start';
    }
}

class Child extends Parent
{
    public static function start()
    {
        parent::start();
        echo 'Child::start';
    }
}