Fetch doesn't send post data

Question

I'm having this problem, where for some reason I can't send data to another PHP script with POST over the fetch API.

I've already checked other solutions and cleaned up my code, but it still won't work.

Maybe I'm missing something.

Here's my code:

function request(where, num, last, query){
 for (var i = num; i > 0; i--) {
  fetch("global/modul.php", {
   method: "POST",
   body: JSON.stringify({
    last: last,
    query: query
   }),
   headers:{
    'Content-Type': 'application/json'
   }
  }).then(function (response) {
   return response.text();
  }).then(function (data) {
   let html = data.trim();
   document.getElementById(where).innerHTML += html.trim();
  }).catch(function (error) {
   console.log('Request failed', error);
  });

  last = document.getElementById(where).lastChild.id;
 }
}

    var_dump($_POST);

Prints:

array(0) { }

I've also tested the solutions shown in Parse Javascript fetch in PHP, but it didn't solve the problem. I still don't get the POST data in my php-script.

Can you see what is actually sent in the network tab of the developer console? — solarc, Mar 19 '19 at 22:26

score 13 · Accepted Answer · answered Mar 19 '19 at 22:24

13

There is no problem with your JS code. However you need to look for the data in another variable in your PHP code, by reading php://input like so:

$_POST = json_decode(file_get_contents('php://input'), true);

Source: https://stackoverflow.com/a/39508364/2831645

answered Mar 19 '19 at 22:24

thibpat

714
5
17

And this is because...? Its just a normal POST, isn't it? – putvande Mar 19 '19 at 22:25
@putvande is it a genuine question or you're hinting thibpat to improve their answer? :-) – zerkms Mar 19 '19 at 22:26
Genuine question. I don't see why `var_dump($_POST)` doesn't work. – putvande Mar 19 '19 at 22:26
6

@putvande because php only decodes `application/x-www-form-urlencoded` automatically – zerkms Mar 19 '19 at 22:27

Fetch doesn't send post data

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