YourClass.php

<?php

//static variable make place in memory without initialization the object\
//static functions are class level function not object level, they cant access object level 

class YourClass
{
 protected $_attribute;
 public function __construct() {
  $this-> _attribute = 10;
  echo $this -> _attribute;
 }

 public function yourStaticMethod() {
  echo $this -> _attribute % 5;
  echo "\n";
  echo $this -> _attribute;
 }

}


$obj = new YourClass();
$obj -> yourStaticMethod();

?>