Slaver

<?php

class OrderProcessor
{
    public function processOrder($orderId, $items, $customerEmail)
    {
        // Check if product exists
        foreach ($items as $item) {
            $sql = "SELECT quantity FROM products WHERE id = " . $item['id'];
            $result = mysqli_query($GLOBALS['db_connection'], $sql);

Slaver

<?php

class UserManager
{
    private $db;

    public function __construct($db)
    {
        $this->db = $db;
    }

Slaver

<?php

/**
 * Custom banner handler for cache
 */
add_action('init', 'adrotate_request_handler');
function adrotate_request_handler() {
    if ( isset($_GET['adrotate_action']) && $_GET['adrotate_action'] == 'show' ) {
        // You can use adrotate_group or adrotate_ad
        // First param — ad group ID