How to gzip AJAX response with PHP (Laravel 4 flavor)

gzip-ajax-response.php

<?php

public function all()
{
    if (Request::ajax()) {
        $encoded_html = gzencode(Model::all(), 9);
        header('Content-Length: ' . strlen($encoded_html));
        header('Content-Encoding: gzip');
        return $encoded_html;
    }
}