javascript - PHP undefined array index from fetch api, but works fine through ajax?

Question

AJAX

 $.ajax({
            type: 'POST',
            data: {"doc-id":doc},
            url: '../src/update_docs.php',
            dataType:"json",

In php

$_POST['doc-id'] //224

Fetch API

fetch('/src/project.php/',{
  method: 'POST',
  headers: {
     'Content-Type': 'application/json',
   },
      credentials: 'same-origin',
      body:{"doc-id":doc},
})

In php

$_POST['doc-id'] //Undefined array index

I have tried many different combinations, such as JSON.stringify, which still results in the same. Is there a way I can send the data with the same method in the curly brackets but allow php to get the index?

question from:https://stackoverflow.com/questions/65641388/php-undefined-array-index-from-fetch-api-but-works-fine-through-ajax

Answer 1

Waitting for answers