gistfile1.php

<?php

/* Dependencias instaladas com composer
{
    "require" :  {
        "knplabs/knp-snappy": "*",
        "h4cc/wkhtmltopdf-amd64": "0.12.x",
        "h4cc/wkhtmltoimage-amd64": "0.12.x"        
    }
}
*/

require_once 'vendor/autoload.php';

use Knp\Snappy\Pdf;
 
$snappy = new Pdf('vendor/h4cc/wkhtmltopdf-amd64/bin/wkhtmltopdf-amd64');

$name = md5(rand());

header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename="' . $name . '.pdf"');

echo $snappy->getOutput('http://getbootstrap.com/css/');