a php internat server route file for flarum

routes.php

<?php
// Set timezone
// date_default_timezone_set("UTC");

// Directory that contains error pages
define("ERRORS", dirname(__FILE__) . "/flarum/error");

// Default index files
define("WEB_INDEX", "index.php");
define("API_INDEX", "api.php");
define("ADMIN_INDEX", "admin.php");

// Optional array of authorized client IPs for a bit of security
$config["hostsAllowed"] = array('127.0.0.1');

function logAccess($status = 200) {
    file_put_contents(
        "php://stdout",
        sprintf("[%s] %s:%s [%s]: %sn",
        date("D M j H:i:s Y"), $_SERVER["REMOTE_ADDR"],
        $_SERVER["REMOTE_PORT"], $status, $_SERVER["REQUEST_URI"])
    );
}

// Parse allowed host list
if (!empty($config['hostsAllowed'])) {
    if (!in_array($_SERVER['REMOTE_ADDR'], $config['hostsAllowed'])) {
        logAccess(403);
        http_response_code(403);
        include ERRORS . '/403.html';
        exit;
    }
}

// if requesting a directory then serve the default index
$path = parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH);
$ext = pathinfo($path, PATHINFO_EXTENSION);
$path_arr = explode('/', $path);

if (empty($ext)) {
    // check flarum's route
    switch( $path_arr[1] ) {
    case 'api' :
    case 'api.php' :
        $path = "/" . API_INDEX;
        break;

    case 'admin' :
    case 'admin.php' :
        $path = "/" . ADMIN_INDEX;
        break;

    default :
        $path = "/" . WEB_INDEX;
    }

    // if the file exists then include it and execute it
    if (file_exists($_SERVER["DOCUMENT_ROOT"] . $path)) {
        //return false;
        require_once './'.$path;
        exit;
    }
} else {
    // If the file exists then return false and let the server handle it
    if (file_exists($_SERVER["DOCUMENT_ROOT"] . $path)) {
        return false;
    }
}

// default behavior
logAccess(404);
http_response_code(404);
include ERRORS . "/404.html";

server.sh

#!/bin/bash

php -S localhost:8000 routes.php