Access Data from Database with Ajax - php

Question

I have tried just about every solution and I know my database returns values if i hard code in the php so the issues is returning the values or determining if it is actually sent as post. It gets to the success function and alerts Worked but I am getting undefined for Item ID.
$(document).ready(function() {
$('.check').click(function(){
alert("Step1");
var thisID = $(this).attr('id');
alert(thisID);
$.ajax({
type: "GET",
url: "XXX.PHP",
data: { "ID": thisID},
cache: false,
async:true,
datatype: "json",
success: function(data)
{
alert("WORKED");
alert(data.ItemID);
}
});
});
});
Here is the PHP
if(isset($_POST['ID']))
{
$ID = $_POST['ID'];
function retrieve($ID)
{
$stmt = $mysqli->query("SELECT * FROM database1.menu WHERE ItemID = $ID");
if($stmt->num_rows) //if there is an ID of this name
{
$row = $stmt->fetch_assoc();
echo $row;
print json_encode($row);
}
}

Answer 1

You could try something like this. Not sure if this is what you need.
$(".check").click(function(event){
event.preventDefault();
var $this = $(this);
var thisID = $this.attr('id');
$.ajax({
type: "POST",
url: base_url + "url.php",
data: {
id: thisID
},
dataType: "text",
cache:false,
success:
function(data){
alert(data);
}
});
return false;
});