Answered getResources: A new random post each day?

&sortby=`RAND()`

&sortby=`FIELD(modResource.id, 4,7,2,5,1 )`

<?php
//[[daylidoc? &parent=`13`&chunkname=`daylidoc`&excludedocs=`18`]]
//[[daylidoc? &parent=`13`&chunkname=`daylidoc`&mode=`week`&dayoffset=`5`]]

$chunkname = isset ($chunkname)?$chunkname:'daylidoc';
$mode = isset ($mode)?$mode:'day';//day,week,month
$dayoffset = isset ($dayoffset)?$dayoffset:1;

if ( isset ($parent))
{
    $table = $modx->getFullTablename('site_htmlsnippets');
    $rs = $modx->db->select('*', $table, 'name="'.$chunkname.'"');
    $chunk = $modx->db->getRow($rs);

    date_default_timezone_set('Europe/Berlin');
    switch($mode)
    {
        case 'month':
            $dateformat = '%m.%Y';
			$date = @strftime($dateformat);
            break;
        case 'week':
            $timestamp=time();
			$ts_dow = ($w = date("w", $timestamp))?$w:7;
            $ts_day = strftime("%d", $timestamp);
            $ts_month = strftime("%m", $timestamp);
            $ts_year = strftime("%Y", $timestamp);
            $timestampweekstart = mktime(0, 0, 0, $ts_month, $ts_day-$ts_dow+$dayoffset, $ts_year);
			$dateformat = '%d.%m.%Y';
			$date = 'week starts at '.@strftime($dateformat,$timestampweekstart);
            break;
        case 'day':
        default:
            $dateformat = '%d.%m.%Y';
		    $date = @strftime($dateformat);
    }
	
    $fields['description'] = 'randomID for '.$date;
    $randomDocID = $chunk['snippet'];

    if (is_array($chunk)){
    	$excludedocs=isset($excludedocs)?explode(',',$excludedocs):array();
		$excludedocs[]=$randomDocID;
		$excludedocs=implode(',',$excludedocs);
    }
   $excludedocs=isset($excludedocs)?' AND id not IN ('.$excludedocs.')':'';
	
    if (is_array($chunk))
    {
        if ($fields['description'] !== $chunk['description'])
        {
            $table2 = $modx->getFullTablename('site_content');
            $rs = $modx->db->select('id,rand() as random', $table2, 'parent='.$parent.$excludedocs, 'random', '1');
            $randomdoc = $modx->db->getRow($rs);
            if (is_array($randomdoc))
            {
                $fields['snippet'] = $randomDocID = $randomdoc['id'];
                $modx->db->update($fields, $table, 'name="'.$chunkname.'"');
            }
          
        }

    }
    else
    {
        $table2 = $modx->getFullTablename('site_content');
        $rs = $modx->db->select('id,rand() as random', $table2, 'parent='.$parent.$excludedocs, 'random', '1');
        $randomdoc = $modx->db->getRow($rs);
        if (is_array($randomdoc))
        {
            $fields['snippet'] = $randomDocID = $randomdoc['id'];
            $fields['name'] = $chunkname;
            $modx->db->insert($fields, $table);
        }

    }
}

return $randomDocID;
?>