Unable to get result using array_shift() - php

Question

When i try to verify user data by verify_user method
<?php
public static function verify_user ($username , $password)
{
global $database;
$username = $database->escape_string($username);
$password = $database->escape_string($password);
$query = "SELECT * FROM users WHERE username = '{$username}' and password = '{$password}' LIMIT 1";
$result_array = self::find_this_query($query);
if (!empty($result_array)) {
$result_array = array_shift($result_array);
return $result_array;
} else {
return false;
}
}
here also my find_this_query method
public static function find_this_query ($enter_here_your_sql_query)
{
global $database;
$result = $database->query($enter_here_your_sql_query);
return $result;
}
and try to login a user here also my login.php code
<?php
if($session->is_signed_in()) {
redirect("index.php");
}
if (isset($_POST['submit'])) {
$username = trim($_POST['username']);
$password = trim($_POST['password']);
}
//method to check db user
$user_found = User::verify_user($username , $password);
if ($user_found) {
$session->login($user_found);
redirect("index.php");
} else {
$the_message = "<p class='alert alert-warning' style='color: grey'>Your password or username is incorrect</p>";
$username = "";
$password = "";
}
?>
i get that error on login page
Warning: array_shift() expects parameter 1 to be array, object given in /admin/includes/User.php on line 189
here line 189 from user.php class
$result_array = array_shift($result_array);
What i do wrong here?

Answer 1

$database->query() does not return an array, it returns an object. Try using $database->fetch_array().

Answer 2

The mysqli::query() function doesn't return an array, it returns a mysqli_result object.
mysqli_result implements the Traversable interface, which allows you to use some array operations on it like foreach, but most other array operations don't work. In particular, you can't use array_shift() on this object.
Instead of
$result_array = array_shift($result_array);
return $result_array;
use:
$row = $result_array->fetch_assoc();
return $row;

Answer 3

i solve that issue by the Help give me Barmar.
Here my updated verify_user function
public static function verify_user ($username , $password)
{
global $database;
$username = $database->escape_string($username);
$password = $database->escape_string($password);
$query = "SELECT * FROM users WHERE username = '{$username}' and password = '{$password}' LIMIT 1";
$result_array = self::find_this_query($query);
if (!empty($result_array)) {
$result_array = $result_array->fetch_array();
return $result_array;
}else{
return false;
}
}
and here my updated login.php
if($session->is_signed_in()) {
redirect("index.php");
}
if (isset($_POST['submit'])) {
$username = trim($_POST['username']);
$password = trim($_POST['password']);
}
//method to check db user
$user_found = User::verify_user($username , $password);
$user = User::instantiation($user_found);
$user_id = $user->id;
if ($user_id){
$session->login($user);
redirect("index.php");
} else {
$the_message = "<p class='alert alert-warning' style='color: grey'>Your password or username is incorrect</p>";
$username = "";
$password = "";
}