php -S 0.0.0.0:80 router.php

router.php

<?php

// php build in server vhost
// php -S 0.0.0.0:80 router.php
// on Windows, router.php must be absolute path, bug of php v5.4.26

$map = array(
    'host.name' => '/file/path',
);

$f = __DIR__.'/router_config.php';
if (file_exists($f)) {
    $map = require $f;
}

$host = $_SERVER['HTTP_HOST'];
if (isset($map[$host])) {
    error_log("$host $_SERVER[REQUEST_URI]");
    $root = $map[$host];
    $arr = explode('?', $_SERVER["REQUEST_URI"]);
    $path = $arr[0];
    $f = $root.$path;
    if ($f == "$root/favicon.ico") {
        if (is_file($f)) {
            header("Content-Type: image/x-icon");
            readfile($f);
        } else {
            return false;
        }
    }
    $fhtml = "$root/index.html";
    $fphp = "$root/index.php";
    if (is_file($f)) {
        $pathinfo = pathinfo($f);
        if (isset($pathinfo['extension']) && $pathinfo['extension'] == 'php') {
            chdir(dirname($f));
            include $f;
        } else {
            $meme = get_content_type($f);
            header("Content-Type: $meme");
            readfile($f);
        }
    } elseif (is_file($fhtml)) {
        echo file_get_contents($f);
    } elseif (is_file($fphp)) {
        chdir($root);
        include $fphp;
    }
} else {
    return false;
}

function get_content_type($f)
{
    static $map = array(
        'js' => 'application/javascript',
        'css' => 'text/css',
        'png' => 'image/png',
        'jpg' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'gif' => 'image/gif',
        'ico' => 'image/x-icon',
    );
    $pathinfo = pathinfo($f);
    if (isset($pathinfo['extension']) && ($extension = strtolower($pathinfo['extension'])) && isset($map[$extension])) {
        return $map[$extension];
    }
    return 'text/html';
}