分享一个调用广告位的代码（函数或Widget类）

自己写的一个调用广告位的函数和Widget类
首先是函数：缓存，自定义广告位模板。

<?php

function Ad($id=0){

    if(intval($id)){

        $ad = S("ad_".$id);

        if(empty($ad)){

            $ad = '';

            $adinfo = M('adplace')->find($id);

            if(!$adinfo || $adinfo['status']==0){

                return '广告位已经关闭';

            }else{

                import(Think.Core.View);

                $view = new View;

                $template = APP_PATH."Tpl/Home/Ad/".($adinfo['tpl']?$adinfo['tpl']:'index').".html";

                if(!is_file($template)){return '模板路径错误';}

                $to = APP_PATH.'Runtime/Cache/'.GROUP_NAME.'/'.md5($template).'.php';

                $width = $adinfo['adwidth'];

                $height = $adinfo['adheight'];

                $typeid = $adinfo['typeid'];

                switch($adinfo['typeid']){

                    case 1:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->select();

                        foreach($adlist as $t){

                            $v['title'] = $t['title'];

                            $v['thumb'] = $t['ad_file'];

                            $v['linkurl'] = $t['ad_url'] ? $t['ad_url'] : $t['url'];

                            $tags[] = $v;

                        }

                        if($tags){

                            $view->display($template);

                            if(!is_file($to)){return '配置错误';}

                            ob_start();

                            include $to;

                            $ad = ob_get_contents();

                            ob_clean();

                        }

                    break;

                    case 2:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->select();

                        foreach($adlist as $t){

                            $v['title'] = $t['title'];

                            $v['thumb'] = $t['ad_file'];

                            $v['linkurl'] = $t['ad_url'] ? $t['ad_url'] : $t['url'];

                            $tags[] = $v;

                        }

                        if($tags){

                            $view->display($template);

                            if(!is_file($to)){return '配置错误';}

                            ob_start();

                            include $to;

                            $ad = ob_get_contents();

                            ob_clean();

                        }

                    break;

                    case 3:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->find();

                        if($adlist){

                            $view->display($template);

                            if(!is_file($to)){return '配置错误';}

                            ob_start();

                            include $to;

                            $ad = ob_get_contents();

                            ob_clean();

                        }

                    break;

                }

                //生成缓存

                S("ad_".$id,$ad);

            }

        }

        return $ad;

    }else{

        return '没有广告位';

    }

}

?>

下面这个是用Widget类，好像用不了缓存，其实是不会写，脑子不会转弯了。

<?php

class AdWidget extends Action{

    public function show($id=0){

        if($id){

            $adinfo = M('adplace')->find($id);

            if(!$adinfo || $adinfo['status']==0){

                echo '';

            }else{

                $this -> assign('id' , $id);

                $this -> assign('width' , $adinfo['adwidth']);

                $this -> assign('height' , $adinfo['adheight']);

                $typeid = $adinfo['typeid'];

                $this -> assign('typeid' , $typeid);

                switch($adinfo['typeid']){

                    case 1:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->select();

                        foreach($adlist as $t){

                            $v['title'] = $t['title'];

                            $v['thumb'] = $t['ad_file'];

                            $v['linkurl'] = $t['ad_url'] ? $t['ad_url'] : $t['url'];

                            $tags[] = $v;

                        }

                        if($tags){

                            $this->assign('tags',$tags);

                            $this->display("Ad:index");

                        }

                    break;

                    case 2:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->select();

                        foreach($adlist as $t){

                            $v['title'] = $t['title'];

                            $v['thumb'] = $t['ad_file'];

                            $v['linkurl'] = $t['ad_url'] ? $t['ad_url'] : $t['url'];

                            $tags[] = $v;

                        }

                        if($tags){

                            $this->assign('tags',$tags);

                            $this->display("Ad:index");

                        }

                    break;

                    case 3:

                        $adlist = M('ad')->where(array('pid'=>$adinfo['id'],'status'=>1))->order('sort asc,id desc')->find();

                        if($adlist){

                            $this->assign('adlist',$adlist);

                            $this->display('Ad:index');

                        }

                    break;

                }

            }

        }else{

            echo '';

        }

    }

}

?>

调用方法：

{:Ad(3)}

<hr />

{:R('Ad/show',array('id'=>3),'Widget')}

我个人喜欢那个Ad($id)函数，调用方便，还能缓存。不知道效率上哪个好一点。对Widget类，不是太明白，刚刚看了资料临时写的。