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ThinkPHP的Widget扩展实例

Jun 06, 2016 pm 08:21 PM
thinkphp

这篇文章主要介绍了ThinkPHP的Widget扩展 ,需要的朋友可以参考下

ThinkPHP的Widget扩展用于根据页面需要输出不同内容,它在项目目录中的Lib/Widget下定义。

具体定义如下:

class NewsListWidget extends Widget{ public function render($data){ // code... } }

需要注意:

1.Widget是一个抽象类,其中有一个抽象方法(abstract)render,必须在子类中实现;
2.Widget的render方法必须使用return返回,而不是直接输出;
3.$data是传入Widget的参数。

然后我们可以在模板中直接调用这个Widget:

{:W('NewsList', array('tmpl' => 'a'))}

这里我传入了一个参数,这是比较常见的用法,Widget用来做什么?根据页面需要输出不同内容,这个不同内容,可以是数据不同,当然也可以是模板不同。

class NewsListWidget extends Widget{ public function render($data){ // code $news; // 这里可以是数据检索语句检索出来一个数据集 $html = $this->renderFile($data['tmpl'], $news); return $html; } }

这时候会自动渲染模板文件/Lib/Widget/NewsList/a.html的内容,并把$news传送过去,,可以当普通模板文件处理,然后输出。

当然,还可以在Action控制器里面获取Widget的内容,进行二次加工。

$content = W('NewsList', array('tmpl' => 'a'), TRUE); // 第三个参数表示是否返回字符串,默认是FALSE,代表直接输出。

另外,ThinkPHP是MVC框架,请大家把数据检索相关的内容放在Model层

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