PHP OOP - Static Methods

Static methods can be called directly - without creating an instance of the class first.
Static methods are declared with the static keyword:

Syntax

<?php
class ClassName {
  public static function staticMethod() {
    echo "Hello CodeLines!";
  }
}
?>

Output

Example

<?php
class greeting {
  public static function welcome() {
    echo "Hello CodeLines!";
  }
}

// Call static method
greeting::welcome();
?>

Output

In this example:

Here, we declare a static method: welcome(). Then, we call the static method by using the class name, double colon (::), and the method name (without creating an instance of the class first).

PHP - More on Static Methods

A class can have both static and non-static methods. A static method can be accessed from a method in the same class using the self keyword and double colon (::):

Example

<?php
class greeting {
  public static function welcome() {
    echo "Hello CodeLines!";
  }

  public function __construct() {
    self::welcome();
  }
}

new greeting();
?>