nexusphp/classes/class_advertisement.php

<?php
class ADVERTISEMENT{
	var $userid;
	var $showad;
	var $userrow = array();
	var $adrow = array();

	function __construct($userid) {
		$this->userid = $userid;
		$this->set_userrow();
		$this->set_showad();
		$this->set_adrow();
	}

	function set_userrow()
	{
		$userid = $this->userid;
		$row = get_user_row($userid);
		$this->userrow = $row;
	}

	function enable_ad()
	{
		global $enablead_advertisement;
		if ($enablead_advertisement == 'yes')
			return true;
		else return false;
	}

	function show_ad()
	{
		if (!$this->enable_ad())
			return false;
		else
		{
			if ($this->userrow && $this->userrow['noad'] == 'yes')
				return false;
			else
				return true;
		}
	}

	function set_showad()
	{
		$showad = $this->show_ad();
		$this->showad = $showad;
	}

	function set_adrow()
	{
		global $Cache;
		if (!$arr = $Cache->get_value('current_ad_array'))
		{
		    $arr = [];
			$now = date("Y-m-d H:i:s");
			$validpos = $this->get_validpos();
			foreach ($validpos as $pos)
			{
				$res = 	sql_query("SELECT code FROM advertisements WHERE enabled=1 AND position=".sqlesc($pos)." AND (starttime IS NULL OR starttime < ".sqlesc($now).") AND (endtime IS NULL OR endtime > ".sqlesc($now).") ORDER BY displayorder ASC, id DESC LIMIT 10") or sqlerr(__FILE__, __LINE__);
				$adarray = array();
				while($row = mysql_fetch_array($res))
					$adarray[]=$row['code'];
				$arr[$pos]=$adarray;
			}
			$Cache->cache_value('current_ad_array', $arr, 3600);
		}
		$this->adrow=$arr;
	}

	function get_validpos()
	{
		return array('header', 'footer', 'belownav', 'belowsearchbox', 'torrentdetail', 'comment', 'interoverforums', 'forumpost', 'popup');
	}
	function get_ad($pos)
	{
		$validpos = $this->get_validpos();
		if (in_array($pos, $validpos) && $this->showad)
			return $this->adrow[$pos];
		else return "";
	}
}
?>