JSON response always returns true - json

Question

I have problem with resolving my response which always resolve as true. I am submitting a form for forgotten password, and i have only one field there, that is e-mail. I check in the database for the record on base on the e-mail, and if the record is returned, i set the json to true, else to false. Here is the code from my Codeigniter controller:
public function checkEmail()
{
// set the validation rules
$this->form_validation->set_rules('checkemail', 'E-Mail', 'valid_email');
$this->form_validation->set_error_delimiters('<br /><p class=jsdiserr>', '</p><br />');
// if validation is passed
if ($this->form_validation->run() != FALSE)
{
$ids=array();
$ids[0]=$this->db->where('email', $this->input->post('checkemail'));
$query = $this->backOfficeUsersModel->get();
if($query)
{
$data = array(
'userid' => $query[0]['userid'],
'username' => $query[0]['username'],
'password' => $query[0]['password'],
'firstname' => $query[0]['firstname'],
'lastname' => $query[0]['lastname'],
'email' => $query[0]['email']
);
$currentUser = array();
$currentUser = $this->session->set_userdata($data);
echo json_encode(array("success" => "true"));
} else {
echo json_encode(array("success" => "false"));
}
// form validation has failed
} else {
$errorMessage = "Wrong email!";
}
} // end of function checkEmail
Now, when i check the result in my javascript file, i get always true. Here is the code:
$("#formSendPassword").submit(function(e){
e.preventDefault();
var email = $(this).find("#checkemail").val();
var obj = {email: email};
var url = $(this).attr("action");
$.post(url, obj, function(r){
if(r.success == "true") {
console.log(r.success);
$('#forgotPasswordForm').hide();
$('#successMailMessage').fadeIn()
} else {
$('#forgotPasswordForm').hide();
$('#errorMailMessage').fadeIn()
}
}, 'json')
})
Can anyone give me a hand with this?
Regards,Zoran

Answer 1

Firstly modify the PHP...
json_encode(array("success" => "true"));
to
json_encode(array("success" => true));
and also
json_encode(array("success" => "false"));
to
json_encode(array("success" => false));
Then modify the JS as follows by changing...
if(r.success == "true") {
to...
if(r.success === true) {
See how you go from there!
EDIT: In liaison with the OP we concluded that the actual issue was the way JS was posting the data.
var obj = {email: email};
Should have been...
var obj = {checkemail: email};
There were also a few specific problems with the PHP that were unrelated to the issue but have now been fixed.

Answer 2

if ($this->form_validation->run() != FALSE)
should be
if ($this->form_validation->run() !== FALSE)
or simply
if (!$this->form_validation->run())
Is the best way to chekc for false... != may not always do as you expect!
You need to parse the JSON in the JS: myObj = $.parseJSON(r);
then use myObj.success