What's the PHP equivalent of a static variable in other languages?

Question

I\'m wondering if PHP has a type of variable in classes that functions like static in other languages. And by that I mean all objects of the same class use the same variable and

Answer 1

You can update static properties:

class A {
   protected static $_foo = 0;

   public function increment()
   {
       self::$_foo++;
   }   

   public function getFoo()
   {
       return self::$_foo;
   }
}


$instanceOne = new A();
$instanceTwo = new A();


$instanceOne->getFoo(); // returns 0

$instanceTwo->increment();

$instanceOne->getFoo(); // returns 1