Get different JSON responses from PHP - php

Question

I'm making an app on phonegap.
I'm doing a script that read a ticket code (two queries, first to update the ticket status if exist on the db and second to write a log on another table). This is working fine.
But now, I want to get different responses (Valid or Invalid) with json, but I can't find a way to read the data and showing different responses.
Script on index.html
$(function() {
$("#savedata").click(function() {
var fcode = $("#code").val();
var fuuid = $("#uuid").val();
$("#code").val(" ");
$("#uuid").val(" ");
$.ajax({type: "POST",
url: "http://phonegap.localhost/test/www/db/update.php",
data: ({code: fcode, uuid: fuuid}),
cache: false,
dataType: "text",
success: Send
});
});
function Send(data){
document.getElementById('entrada').innerHTML = ("Done!");
}
});
Update.php
<?php
require_once('conndb.php');
$code= $_POST['code'];
$uuid = $_POST['uuid'];
$data=array();
$sql = "SELECT code FROM ticket WHERE code='$code'";
$result = mysql_query($sql);
if(mysql_num_rows($result) >0){
$sql="UPDATE ticket SET redeem_status= 1 WHERE code = '$code'";
$resultado=mysql_query($sql);
$sql2="INSERT INTO log (id, codigo, hora, uuid, valido) VALUES (NULL, '$code', CURRENT_TIMESTAMP, '$uuid', 1)";
$resultado2=mysql_query($sql2);
}
$val['status'] = 1;
echo json_encode($val);
}else{
$sql2="INSERT INTO log (id, codigo, hora, uuid, valido) VALUES (NULL, '$code', CURRENT_TIMESTAMP, '$uuid', 0)";
$resultado2=mysql_query($sql2);
$val['status'] = 0;
echo json_encode($val);
}
?>

Answer 1

In your javascript code you expect TEXT data but in php-script you sending json. So change dataType to json and fix function Send
Here is simple solution
$(function() {
$("#savedata").click(function() {
var fcode = $("#code").val();
var fuuid = $("#uuid").val();
$("#code").val(" ");
$("#uuid").val(" ");
$.ajax({type: "POST",
url: "http://phonegap.localhost/test/www/db/update.php",
data: ({code: fcode, uuid: fuuid}),
cache: false,
dataType: "json",
success: Send
});
});
function Send(data){
if (data.status == 0){
document.getElementById('entrada').innerHTML = ("Error!");
}
else{
document.getElementById('entrada').innerHTML = ("Done!");
}
}
});

Answer 2

You just have to create a new PHP page which is reading data in your DB and then returning it as JSON (as you're doing right now) and bind an action on a button for example with jQuery in your phonegap app to launch an Ajax call to this page then on success, you use a function to apply what you receive on the smartphone screen.