Quizgum : using static

Using properties and methods without instantiation

To use the properties and methods in the class, you had to create an instance.
But there are ways to use it without doing so.
Use the keyword static.

How to Use the Static Keyword with Properties

access modifier static property

How to Use the Static Keyword in Methods Accessor static function methods

access modifier static function method

So let's do it.

<?php
    class Car
    {
        public static $hello = "Hello? I'm a static property";
 
        public static function hello()
        {
            return "Hello? I'm a static method";
        }
    }
?>

You can declare properties and methods using static as above.
Then shall we use it now?

How to call properties using the static keyword

class name :: property name;

How to call a method with the static keyword

class name :: method name;

Let's check it through an example.

<?php
    class Car
    {
        public static $hello = "Hello? I'm a static property";
 
        public static function hello()
        {
            return "Hello? I'm a static method";
        }
    }
 
    echo 'property : '.Car::$hello;
    echo '<br>';
    echo 'method : '.Car::hello();
?>

Result

Of course, access modifier should use public. Because it's called outside the class. ^-^ *