sakura/public/profile.php

<?php
/*
 * Sakura User Profiles
 */

// Declare Namespace
namespace Sakura;

// Include components
require_once str_replace(basename(__DIR__), '', dirname(__FILE__)) . 'sakura.php';

// Initialise templating engine
$template = new Template();

// Change templating engine
$template->setTemplate($templateName);

// Get the user's context
$profile = User::construct(isset($_GET['u']) ? $_GET['u'] : 0);

// Views array
$views = [
    'index',
    'friends',
    'threads',
    'posts',
    'comments',
];

// Assign the object to a renderData variable
$renderData['profile'] = $profile;
$renderData['profileView'] = isset($_GET['view']) && in_array($_GET['view'], $views) ? $_GET['view'] : $views[0];

// If the user id is zero check if there was a namechange
if ($profile->id() == 0) {
    // Fetch from username_history
    $check = Database::fetch('username_history', false, ['username_old_clean' => [Main::cleanString(isset($_GET['u']) ? $_GET['u'] : 0, true, true), '=']]);
    
    // Redirect if so
    if ($check) {
        $renderData['page'] = [
            'title' => 'Information',
            'message' => 'The user this profile belongs to changed their username, you are being redirected.',
        'redirect' => $urls->format('USER_PROFILE', [$check['user_id']]),
        ];

        // Set parse variables
        $template->setVariables($renderData);

        // Print page contents
        echo $template->render('global/information');
        exit;
    }
}

// Set parse variables
$template->setVariables($renderData);

// Print page contents
echo $template->render('main/profile');