javascript - AJAX jquery json sending array to php -

i'm trying send associative array via ajax $.post php. here's 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 trying read received data in php script:

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

but it's not working. i'm newbie js, can't figure out i'm doing wrong.

check below link reference

sending array php 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 this:

<?php       $array = json_decode($_post['array']);     print_r($array); //for debugging purposes       $response = array();      if(isset($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);     }