Function and variables issue - php

Question

I have a problem.. When I execute this code:
public function korisnici(){
$modelk = new Korisnici();
$upit = $modelk::find()->asArray()->orderBy('id DESC')->all();
$items = [];
foreach ($upit as $key => $value) {
foreach ($value as $kljuc => $vrijednost){
$items[] = [$kljuc => $vrijednost];
}
}
return $items;
}
private static $users = $this->korisnici();
It gives me this error: syntax error, unexpected '$this' (T_VARIABLE)..
Can someone help me, how can I call this function?
Here's my whole class:
class User extends \yii\base\Object implements \yii\web\IdentityInterface
{
public $id;
public $username;
public $password;
public $authKey;
public $accessToken;
public $arr;
public function korisnici(){
$modelk = new Korisnici();
$upit = $modelk::find()->asArray()->orderBy('id DESC')->all();
$items = [];
foreach ($upit as $key => $value) {
foreach ($value as $kljuc => $vrijednost){
$items[] = [$kljuc => $vrijednost];
}
}
return $items;
}
public $users = $this->korisnici();
/**
* #inheritdoc
*/
public static function findIdentity($id)
{
return isset(self::$users[$id]) ? new static(self::$users[$id]) : null;
}
/**
* #inheritdoc
*/
public static function findIdentityByAccessToken($token, $type = null)
{
foreach (self::$users as $user) {
if ($user['accessToken'] === $token) {
return new static($user);
}
}
return null;
}
/**
* Finds user by username
*
* #param string $username
* #return static|null
*/
public static function findByUsername($username)
{
foreach (self::$users as $user) {
if (strcasecmp($user['username'], $username) === 0) {
return new static($user);
}
}
return null;
}
/**
* #inheritdoc
*/
public function getId()
{
return $this->id;
}
/**
* #inheritdoc
*/
public function getAuthKey()
{
return $this->authKey;
}
/**
* #inheritdoc
*/
public function validateAuthKey($authKey)
{
return $this->authKey === $authKey;
}
/**
* Validates password
*
* #param string $password password to validate
* #return boolean if password provided is valid for current user
*/
public function validatePassword($password)
{
return $this->password === $password;
}
}
I'm trying to change this default model from Yii Framework so I can login using database...

Answer 1

Looks like you have copied it from a class. The following will work like a regular function. Still not sure where you get $modelk = new Korisnici(); from
function korisnici(){
$modelk = new Korisnici();
$upit = $modelk::find()->asArray()->orderBy('id DESC')->all();
$items = [];
foreach ($upit as $key => $value) {
foreach ($value as $kljuc => $vrijednost){
$items[] = [$kljuc => $vrijednost];
}
}
return $items;
}
print_r(korisnici());
EDIT: After looking at your whole class:
You need to use the __construct method.
public function __construct()
{
$this->users = $this->korisnici();
}