Get your own PHP server Result Size: 625 x 565
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<!DOCTYPE html>
<html>
<body>
<?php
class A {
  public static function welcome() {
    echo "Hello World!";
  }
}
class B {
  public function message() {
    A::welcome();
  }
}
$obj = new B();
echo $obj -> message(); 
?>
 
</body>
</html>
Hello World!