I am firt time trying DELETE method with fetch in javascript. I just want to read the sent data from my fetch in php. I am doing this:

... in js
fetch(this.url+"?deleteID="+ID,{method:'DELETE'})  

... in php
 if(($_SERVER['REQUEST_METHOD'] == 'DELETE')){
     $id=  $_GET["deleteID"];
}

but it is failing and I do not know why. The definition of $_GET is "An associative array of variables passed to the current script via the URL parameters" and I am passing deleteID as a param or not ? (When the method is GET, this works)
Thanks for explanation.