Need help in this code

 https://github.com/NoahY/q2a-featured/blob/master/qa-featured-layer.php

<?php

class qa_html_theme_layer extends qa_html_theme_base {

var $featured_questions;

function doctype(){

$featured = qa_db_read_one_assoc( qa_db_query_sub('SELECT * FROM ^posts q INNER JOIN ^posttags t ON q.postid=t.postid INNER JOIN ^words w ON t.wordid=w.wordid WHERE q.type="Q" AND w.word=$ ORDER BY rand() LIMIT 1', "tag" ));

if($featured && (!$this->request || $this->request=='questions') && !qa_get('sort') && isset($this->content'q_list'])) {

$featured = explode(',',$featured);

foreach($this->content'q_list']'qs'] as $idx => $question) {

if(in_array($question'raw']'postid'],$featured)) {

unset($this->content'q_list']'qs']$idx]);

}

}

foreach($featured as $id) {

$userid = qa_get_logged_in_userid();

$selectspec=qa_db_posts_basic_selectspec($userid,true);

$selectspec'source'].=" JOIN (SELECT postid FROM ^posts WHERE postid=$) y ON ^posts.postid=y.postid";

$selectspec'arguments']] = $id;

$question = qa_db_select_with_pending($selectspec);

$usershtml=qa_userids_handles_html(qa_any_get_userids_handles($question));

$options=qa_post_html_defaults('Q');

$q_item = qa_any_to_q_html_fields($question$id], $userid, qa_cookie_get(), $usershtml, null, $options);

array_unshift($this->content'q_list']'qs'],$q_item);

}

$this->featured_questions = count($featured);

}

qa_html_theme_base::doctype();

}

// theme replacement functions

function q_list($q_list) {

if(isset($q_list'qs']))

foreach ($q_list'qs'] as $idx => $q_item)

if($idx < $this->featured_questions)

$q_list'qs']$idx]'classes'] = @$q_list'qs']$idx]'classes'].' qa-q-list-item-featured';

else

break;

qa_html_theme_base::q_list($q_list);

}

function head_custom() {

$this->output('<style>',qa_opt('featured_question_css'),'</style>');

qa_html_theme_base::head_custom();

}

}

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