gae-app.php

<?php

/**
 * This file handles all routing for a WordPress project running on App Engine.
 * It serves up the appropriate PHP file depending on the request URI.
 *
 * @see https://cloud.google.com/appengine/docs/standard/php7/runtime#application_startup
 */

/**
 * Function to return a PHP file to load based on the request URI.
 *
 * @param string $full_request_uri The request URI derivded from $_SERVER['REQUEST_URI'].
 */
function get_real_file_to_load($full_request_uri)
{
    $request_uri = @parse_url($full_request_uri)['path'];

    // Redirect /wp-admin to /wp-admin/ (adds a trailing slash)
    if ($request_uri === '/wp-admin') {
        header('Location: /wp-admin/');
        exit;
    }

    // Serve up "index.php" when /wp-admin/ is requested
    if ($request_uri === '/wp-admin/') {
        return '/wp-admin/index.php';
    }

    // Load the file requested if it exists
    if (is_file(__DIR__ . $request_uri)) {
        return $request_uri;
    }

    // Send everything else through index.php
    return '/index.php';
}

// fixes b/111391534
$_SERVER['HTTPS'] = $_SERVER['HTTP_X_APPENGINE_HTTPS'];

// Loads the expected WordPress framework file
// (e.g index.php, wp-admin/* or wp-login.php)
$file = get_real_file_to_load($_SERVER['REQUEST_URI']);

// Set the environment variables to reflect the script we're loading
// (in order to trick WordPress)
$_SERVER['DOCUMENT_URI']    = $_ENV['DOCUMENT_URI']    = $file;
$_SERVER['PHP_SELF']        = $_ENV['PHP_SELF']        = $file;
$_SERVER['SCRIPT_NAME']     = $_ENV['SCRIPT_NAME']     = $file;
$_SERVER['SCRIPT_FILENAME'] = $_ENV['SCRIPT_FILENAME'] = __DIR__ . $file;

require __DIR__ . $file;