I\'m not pro in Object Oriented Programming and I got a silly question:
class test {
public static function doSomething($arg) {
$foo = \'I ate yo
It makes no difference if your method don't use $this and don't access to static properties.
Static properties cannot be accessed through the object using the arrow operator ->.
$this is not available inside the method declared as static.
But, you should always use :: to call a static method, even through php let you call it on an instance.