codeigniter mysql queries don't work - php

Question

I know this isn't good practice to have the queries within a controller, but for some reason they do not work within this controller class. I'm not too experienced with codeigniter, so any help is appreciated, as I have no idea on how else to set this up to work properly. I have an ajax script that gets the information.
Here is my code:
<?php
class Phonecall extends CI_Controller {
public function index() {
/*$con = mysqli_connect('localhost','root','root','MYDB');
if (!$con) {
die ('Could not connect: ' . mysqli_error($con));
}*/
//$operatorId = $_SESSION['Oper']['OperatorID']; //I also cannot figure out how to get $_SESSION information either
//$sql = "SELECT phone_number FROM incoming_calls WHERE OperatorID='${operatorId}'";
//$result = mysqli_query($con,$sql);
$query = $this->db->query("SELECT phone_number FROM MYDB.incoming_calls");// WHERE OperatorID='${operatorId}'");
while ($row = $query->row_array()) {
$number = $row['phone_number'];
}
/*$sql = "SELECT Username, UserID, Name
FROM tblUsers
WHERE PhoneHome='999-999-9999' OR PhoneCell='999-999-9999' OR PhoneWork='999-999-9999'";
*/
$query = $this->db->query("SELECT Username, UserID, Name
FROM MYDB.tblUsers
WHERE PhoneHome='999-999-9999' OR PhoneCell='999-999-9999' OR PhoneWork='999-999-9999'");
while ($row = $query->row_array()) {
$userArray[] = array("name" => $row['Name'], "username" => $row['Username'], "user_id" => $row['UserID']);
}
if (!empty($userArray)) {
echo json_encode($userArray);
}
if (isset($_POST["drop"])) {
$query = $this->db->query("DELETE FROM MYDB.incoming_calls
WHERE phone_number = $number
LIMIT 1");
if (!$result) {
die ('Could not drop row: ');
}
}
$this->db->close();
}
}
?>
Here is my JS:
var user = new Array();
var user_id = new Array();
var name = new Array();
$.get(baseURL + 'phonecall/index', function(data) {//where baseURL is defined
var loginInfo = jQuery.parseJSON(data);
for (var i = 0; i < loginInfo.length; ++i) {
name[i] = loginInfo[i].name;
user[i] = loginInfo[i].username;
user_id[i] = loginInfo[i].user_id;
}
}
I do not know much about frameworks and I'm trying to learn, I also do not know how to make this file access the $_SESSION data. Any help is greatly appreciated.

Answer 1

Always use model for DB queries.
For first query use the following code:
$this->db->select("phone_number");
$this->db->from("incoming_calls");
$query = $this->db->get();
return $query->result_array();
For the secound query use this:
$this->db->select("Username, UserID, Name");
$this->db->from("tblUsers");
$this->db->where("PhoneHome,'999-999-9999'");
$this->db->where("PhoneCell,'999-999-9999'");
$this->db->where("PhoneWork,'999-999-9999'");
$query = $this->db->get();
return $query->result_array();
Be sure to make 2 different functions for the queries in model.
Then at your controller side use the following code:
$data['first_record'] = $this->your_modal_name->your_first_function_name();
$data['secound_record'] = $this->your_modal_name->your_second_function_name();
Then run this data in foreach, and it will give you the record, which you want.