Question

I am trying to edit a data query using php by passing it through javascript,

my ajax request looks like

var totalSearchResult=10;
$.ajax({
    url:"php/queryManipulation.php",
    type: 'POST',
    data: { totalQuery : totalSearchResult,  query : '{"data":{"match_all":{}}}'},

    success: function(finalList)
    {
        alert(finalList);
    }
});

my php code looks like

<?php
$from=$_POST["totalQuery"];
$qry=json_decode($_POST["query"]);
$qry->from=$from;   }?>

I am trying to get it in the form,

{"data": {"match_all": {}} , "from": 10}

I get the error Object of class stdClass could not be converted to string

Answer 1

Edit: Changed json_decode return value from array to object

You need to encode the json again just after finishing the edits.
So what you can do is something like:

<?php
    $from            = $_POST["totalQuery"];
    $qry             = json_decode($_POST["query"]);
    $qry->data->from = $from;
    //you will get the new json string 
    //as the finalList variable in your post callback
    echo json_encode($qry); 
?>