CodeIgniter function not taking parameters - php

Question

I defined this function
function login_user($emailusername, $password) { }
the function uses the variables but, when I try to call it using
$this->login->login_user('username', 'password');
it returns an error saying that those variables are undefined in the function.
EDIT: I set the function in a login model
I get these errors:
A PHP Error was encountered
Severity: Notice
Message: Undefined index: password
Filename: models/login.php
Line Number: 20
line 20: $pass = crypt($password, $hash['password']);
A PHP Error was encountered
Severity: Notice
Message: Undefined index: username
Filename: models/login.php
Line Number: 26
line 26: if ($user_data['username'] == $emailusername || $user_data['email'] == $emailusername) {
A PHP Error was encountered
Severity: Notice
Message: Undefined index: email
Filename: models/login.php
Line Number: 26
line 26: if ($user_data['username'] == $emailusername || $user_data['email'] == $emailusername) {
This is the function
function login_user($emailusername, $password) {
//To initiate session set this cookie
$query = $this->db->query("SELECT password FROM usrs WHERE username = '$emailusername' or email = '$emailusername'");
$hash = $query->result();
$pass = crypt($password, $hash['password']);
$nq = $this->db->query("SELECT usr_id, username, email from usrs WHERE email = '$emailusername' or username = '$emailusername' and password = '$pass'");
$user_data = $nq->result();
if($emailusername&&$password) {
if ($user_data['username'] == $emailusername || $user_data['email'] == $emailusername) {
if($hash['password'] == $pass) {
$_SESSION['login'] = True;
$_SESSION['uid'] = $user_data['usr_id'];
$_SESSION['username'] = $user_data['username'];
return True;
} else
return False;
} else
return False;
} else
return False;
}

Answer 1

This error is not in your variables.
There is no index calldes 'password' in your $hash table;
Check Your $hash table first.
$hash = $query->result();
function return object array consist
$hash->password = '';
If want to get single row and result is to be array use row_array() function
$hash = $query->row_array();
this returns
$hash['password']

Answer 2

The issue originates from this line:
$hash = $query->result();
As per the documentation, result() does the following:
This function returns the query result as an array of objects, or an empty array on failure. Typically you'll use this in a foreach loop...
So, $hash contains no indices named password, username, or email - hence the error messages you're receiving.
If you're only concerned with the first row returned from that query (which is my assumption), you can use row_array() to return only the first record and as an array, which will make those indices available, like this:
$hash = $query->row_array();
// $hash['password'], $hash['username'], and $hash['email'] are now available

Answer 3

Considering that you are using codeignitor, if the function is in a controller 'Login' then use
$this->login_user('username', 'password');
If the function is in a library, then make sure that you have loaded the library and the name of the instance is 'login'
And if you have included the file directly then just make an object and call the method
$loginObj = new login();
$loginObj->login_user('username', 'password');
Cheers,
Vedant