1. Why not to make assumptions about where your site visitors come from send to do a hyperlink’s job:

    (That link didn’t work, obv)

  2. How to emulate standard front-controller behaviour of routing static assets statically, otherwise calling index.php using the PHP 5.4 built-in server:

    // file: index.php
    // Route static assets from CLI server
    if (PHP_SAPI === 'cli-server') {
        if (file_exists(__DIR__ . $_SERVER['REQUEST_URI']) and !is_dir(__DIR__ . $_SERVER['REQUEST_URI'])) {
            return false;
        }
    }
    
    // do usual front-controller stuff