merging two array into single inside json_encode for android - php

Question

I have to combine two array into single inside Json encode. my code is,
// Controller
$email = $this->input->get('email');
$pass = $this->input->get('password');
$enc_pass = 0;
$get_pass = $this->select->selectData($email);
if(!empty($get_pass)) {
foreach($get_pass as $password)
$enc_pass = $password['user_password'];
$dec_pass = $this->encrypt->decode($enc_pass);
if($pass == $dec_pass) {
$details = array('tag' => 'login', 'status' => 'true');
echo json_encode(array_merge($get_pass, $details));
}
else {
$details = array('tag' => 'login', 'status' => 'false', 'error_msg' => 'Incorrect Email or Password');
echo json_encode($details);
}
}
else {
$details = array('tag' => 'login', 'status' => 'false', 'error_msg' => 'Incorrect Email or Password');
echo json_encode($details);
}
// Model
public function selectData($email) {
$query = $this->db->query('SELECT * FROM tbl_user WHERE email = "'.$email.'"');
$count = $query->num_rows();
if($count > 0)
return $result = $query->result_array();
else
return 0;
}
Now the output for the above code is,
{"0":{"user_id":"1","user_name":"Jithin Varghese","user_email":"jithinvarghese111#gmail.com","user_phone":"9947732296","user_status":"1"},"tag":"login","status":"true"}
Required output is,
{"user_id":"1","user_name":"Jithin Varghese","user_email":"jithinvarghese111#gmail.com","user_phone":"9947732296","user_status":"1","tag":"login","status":"true"}
How to get the required output. I have tried a lot. How to implement this.
Thankyou.