jQuery json from PHP result - php

Question

I have this jQuery script
var dataString = "class_id="+class_id;
$.ajax({
type: "POST",
url: "page.php",
data: dataString,
success: function (msg) {
//stuck here
},
error: function () {
showNotification("error", "Could not process at this time, try again later."); //this is a function created by me (which works fine so I just left the code in here)
}
});
my PHP output is something like this
echo '{status:1,message:"Success"}';
or
echo '{status:0,message:"Failure"}';
what I am trying to do in jQuery success: function(...) part is check if status is 0 or 1 and then show the message.
I tried to do is
success: function(text) {
if(parseInt(text.status) == 1) {
alert(text.message); // this is the success, the status is 1
} else {
alert(text.message); // this is the failure since the status is not 1
}
}
which didn't work, it was only outputing the else statement, even though the status was 1

Answer 1

Your PHP is generating invalid JSON, and shows no sign of setting an appropriate content type header to tell the browser to treat it as JSON in the first place. So first, fix the PHP:
header('application/json');
echo json_encode(Array("status" => 1, "message" => "Success"));
Then:
success: function (msg) {
alert(msg.message)
},

Answer 2

You can also use
PHP
echo json_encode(Array("status" => 1, "message" => "Success"));
JS
Inside your call back function use
success: function (msg) {
$.parseJSON(msg);
alert(msg.message);
}
The parseJSON will convert the json string returned/echoed by PHP in to json object.

Answer 3

Try something like below,
$.ajax({
type: "POST",
url: "page.php",
data: dataString,
dataType: 'json',
success: function (msg) {
if (msg.status == 0) {
alert("Success " + msg.message);
} else if (msg.status == 1) {
alert("Error " + msg.message);
}
},
error: function () {
showNotification("error", "Could not process at this time, try again later."); //this is a function created by me (which works fine so I just left the code in here)
}
});

Answer 4

If you don't specify in $.ajax the type 'json' data passed to response handler is treated as string. While if you specify 'json' dataType parameter you can use:
msg.status
and
msg.message
As a hint i suggest in php to use the json_encode function to generate json output.