is it correct code ? exceed memory limit :(

[Dismounted]

PHP Code:

$postdata = $vbulletin->db->query_first("
    SELECT `pagetext`
    FROM `" . TABLE_PREFIX . "post`
    WHERE `postid` = 1111
"); 


You can't echo in a plugin, because it'd just appear at the very top of the page. Use $postdata[pagetext] in a template.

Also, there's no need to use aliases and grab the postid in your query, you already have the postid (1111).