Json returns undifined - php

Question

Good day guys I have the following login page. Which I access using ajax from my view page. The problem the data that is returned when I try to display on ajax I get an error on the console.
login.js:35 Uncaught TypeError: Cannot read property 'success' of
undefined
at Object.success (login.js:35)
at i (jquery-2.2.0.min.js:2)
at Object.fireWith [as resolveWith] (jquery-2.2.0.min.js:2)
at z (jquery-2.2.0.min.js:4)
at XMLHttpRequest. (jquery-2.2.0.min.js:4)
<?php
ob_start();
function __autoload($classname)
{
require_once("../../database/$classname.php");
}
class userlogin extends database
{
private $errors = array();
private $message = array();
private $redirect = array();
private $data = array();
private $username;
private $password;
function login()
{
if (empty($_POST['username']) || empty($_POST['password'])) {
$this->message['error'] = "Please enter username and password";
} else {
$this->username = $_POST['username'];
$this->password = $_POST['password'];
try {
$this->stmt = $this->dbh->prepare("SELECT adminID,adminEmail,adminPassword,admintype FROM admin where adminEmail = ? ");
$this->stmt->execute(array(
$this->username
));
$this->results = $this->stmt->fetchall();
if (count($this->results) > 0) {
foreach ($this->results as $key => $row) {
if (password_verify($this->password, $row['adminPassword'])) {
$_SESSION['user'] = $row['adminID'];
$_SESSION['email'] = $this->username;
$_SESSION['usertype'] = $row['admintype'];
switch ($row['admintype']) {
case 's':
$this->redirect['redirect'] = "seo/index.php?route=home";
break;
case 'a':
$this->redirect['redirect'] = "admin/index.php?route=home";
break;
}
$this->message['success'] = "ok";
} else {
$this->message['error'] = "Username and password does not match";
}
}
} else {
$this->message['error'] = "Username does not exist";
}
}
catch (PDOException $pdo) {
$this->error = $pdo->getMessage();
error_log($this->error);
}
$this->data['message'] = $this->message;
$this->data['redirects'] = $this->redirect;
ob_end_clean();
echo json_encode($this->data);
}
}
}
if ($_SERVER['REQUEST_METHOD'] == "POST") {
$login = new userlogin();
$login->login();
}
?>
and my js
function proccessLogin(){
var username = $('input[type="email"][name="email"]').val();
var password = $('input[type="password"][name="upass"]').val();
$.ajax({
type : "POST",
data : {username:username,password:password},
url : "controller/login.php",
beforeSend : function(){
$('button').html('Checking...');
},
success : function(data){
console.log(data);
if(data.message.success == "ok"){
$('#results').removeClass('error');
$('#results').addClass('success');
$('#results').html('login Success, loading user data..');
$('button').html('Loading Profile.. i class="fa fa-spinner fa-pulse fa-1x fa-fw"></i>');
var redirectUrl = JSON.stringify(data.redirects);
redirectUrl = redirectUrl.replace(/[{"":}]/g, '');
var url = redirectUrl.replace('redirect','');
setTimeout(' window.location.href = "'+ url + '"; ', 6000);
}else{
$('button').html("Sign in");
$('#results').removeClass('success');
$('#results').addClass('error');
$('#results').html(data.message.error);
}
},
error : function(xhr){
console.log('Error : ' + xhr);
}
});
return false;
}
Console log results :
{"message":{"success":"ok"},"redirects":{"redirect":"seo\/index.php?route=home"}}
I want to be able to display the message from the json array if success is ok I will display custome message else display what is coming from response. the problem is property undefined.
line 35 :
if(data.message.success == "ok"){

Answer 1

I think the response data is String and you need to call
$.parseJSON(data);
before you can access message and then success
=============
If you want to use dataType: "json", you need to send your JSON as JSON by using PHP's header() function:
/* Send as JSON */
header("Content-Type: application/json", true);
/* Return JSON */
echo json_encode($json);
/* Stop Execution */
exit;