[SOLVED] Creating random content area

<?php $res = $modx->db->select("content", "modx_site_content", "id=3");
$content = $modx->db->getRow($res);
echo $content['content']; ?>

<?php $rand = rand(3, 6);
$page_id = "id=" + $rand;
$res = $modx->db->select("content", "modx_site_content", $page_id);
$content = $modx->db->getRow($res);
echo $content['content']; ?>

$input = array(3,6);
$rand = array_rand($input);

$input = array(0,1,2,3,4,5,6,7,8,9);
$rand = array_rand($input);

$input = array(4019,2,48,4011);
$random_id = array_rand($input);
$page_id = "id="+$random_id;
echo $page_id;

$input = array(4019,2,48,4011);
$random_id = array_rand($input);
$page_id = $input[$random_id];
$page = "id="+$page_id;
$res = $modx->db->select("content", "modx_site_content", $page);
$content = $modx->db->getRow($res);
echo $content['content'];

[!Ditto? &documents=`4019,2,48,4011` &display=`1` &randomize=`1` &tpl=`@CODE [+content+]`!]

$page = "id="+$page_id;