jQuery AJAX POST to PHP issue

Question

I’m trying to evaluate the value of id, which should be passed in the POST from jQuery to PHP.

The call is returning {'id':'99'}, which is ok if id is not equal to 0. I wonder why ($x == "0") is not being evaluated to true in my PHP function.

Any help would be greatly appreciated! Thanks in advance.

jQuery:

$( document ).ready(function() {
    $.ajax({
        url: '/more.php',
        type: 'POST',
        data: JSON.stringify({"id" : "0"}),
        success: function(data) {
            $("body").append(data);
        }
    });
});

PHP:

if (isset($_POST['id'])) {
        $con=mysqli_connect("localhost","user","pass","schema");
        getmore($_POST['id']);

        function getmore($x) {
         if ($x == "0") {
          $sqldata = mysqli_query($con,"SELECT * FROM IRCLOG WHERE DATETIME >= date_sub(curdate(),interval 1 day)");
         }
         else {
          $sqldata = mysqli_query($con,"SELECT * FROM IRCLOG WHERE DATETIME >= date_sub(curdate(),interval 1 day)");
         }
           // your business logic
          $rows = array();
          while($r = mysqli_fetch_array($sqldata)) {
             $rows[] = $r;
          }

          echo json_encode($rows);
        }
    }
else {echo "{'id':'99'}";}

did you try if (is_numeric($x) && $x === 0)) or compare 0 without "(quotes) — Dimag Kharab
– Dimag Kharab, Commented Feb 18, 2014 at 4:08

hjpotter92 · Accepted Answer · 2014-02-18 04:18:34Z

2

I think it might be because PHP is converting the $_POST['id'] to integer. Try the following:

function getmore($x) {
    $x = intval( $x );
    if ($x == 0) {

Another reason might be that your AJAX is sending the data incorrectly. Try using:

data: {id : "0"}

in the AJAX request.

The data setting in AJAX call accepts either PlainObject or String argument. From the docs:

It is converted to a query string, if not already a string. It's appended to the url for GET-requests. See processData option to prevent this automatic processing. Object must be Key/Value pairs. If value is an Array, jQuery serializes multiple values with same key based on the value of the traditional setting (described below).

edited Feb 18, 2014 at 4:18

answered Feb 18, 2014 at 4:09

hjpotter92

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Comments

user3181614 · Accepted Answer · 2014-02-18 05:24:07Z

1

Why don't you use

$(document).ready( function() {
    var id_main = 0;
        $.ajax ({
            type: "POST",
            url: "/more.php",
            data: { id: id_main },
    });
});

answered Feb 18, 2014 at 5:24

user3181614

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Comments

Chandan Sharma · Accepted Answer · 2014-02-18 04:11:45Z

0

send your data like this. data: {"id" : "0"},

answered Feb 18, 2014 at 4:11

Chandan Sharma

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