AJAX jquery json sending array to php

Question

I'm trying to send a associative array via AJAX $.post to php. Here's my code:

var request = {
 action: "add",
 requestor: req_id,
 ...
 }
 var reqDetails = $("#request_details").val();
 switch(reqDetails){
 case 1: 
 request[note] = $("#note").val();
 break;
 ...
 }
 if(oldRequest()){
 request[previousID] = $("old_id").val();
 }
 $('#req_button').toggleClass('active');
 $.post("scripts/add_request.php", {
 request_arr: JSON.stringify(request)
 }, function(data){
 console.log(data);
 $('#req_button').toggleClass('active');
 }, 'json');

And i'm simply trying to read the received data in my php script:

echo json_decode($_POST["request_arr"]);

But it's not working. I'm a newbie to js, I can't figure out what I'm doing wrong.

• Dan Smith: data: JSON.stringify(request)
• James: The undefined variables note and previousID should probably be strings "note" and "previousID"
• Zaxter: Thanks for pointing that @James. I've changed the code now, but I still get the same problem. I even tried Deeban's answer, but It isn't working for me.

Answer 1

Check below link for your reference

Sending an array to php from JavaScript/jQuery

Step 1

$.ajax({
 type: "POST",
 url: "parse_array.php",
 data:{ array : JSON.stringify(array) },
 dataType: "json",
 success: function(data) {
 alert(data.reply);
 }
});

Step 2

You php file looks like this:

<?php 
 $array = json_decode($_POST['array']);
 print_r($array); //for debugging purposes only
 $response = array();
 if(isset($array[$blah])) 
 $response['reply']="Success";
 else 
 $response['reply']="Failure";
 echo json_encode($response);

Step 3

The success function

success: function(data) {
 console.log(data.reply);
 alert(data.reply);
 }

• Zaxter: I tried this, but I'm getting "POST server/add_request.php 500 (Internal Server Error)" . Its at the line "$array = json_decode($_POST['array']);"

Answer 2

You are already using "json" as dataType, so you shouldn't apply 'stringify' operation on your data.

Instead of request_arr: JSON.stringify(request), can you try request_arr: request directly?

• Tuğca Eker: Can you edit your PHP Code with " print_r($_POST);" and share result?