Yii中创建自己的Widget实例_PHP
本文实例讲述了Yii中创建自己的Widget实现方法。分享给大家供大家参考,具体如下:
这里以一个随机广告图片为例说明Yii中Widget的用法
1. 调用Widget
代码如下:
widget('WidgetName'); ?>
或者
<?php $widget=$this->beginWidget('path.to.WidgetClass'); ?> ...可能会由小物件获取的内容主体... <?php $this->endWidget(); ?>
也可以传参到Widget类
<?php $userId = 1; ?> <?php $this->widget('WidgetName',array('userId'=>$userId)); ?>
参数userId自动映射到Widget类的同名属性,所以在定义Widget时,别忘记了声明该属性。
2. 创建Widget
自定义Widget类要继承CWidget,覆盖方法run
<?php class BannerMagic extends CWidget { public function run(){ } }
或者:
class MyWidget extends CWidget { public function init() { // 此方法会被 CController::beginWidget() 调用 } public function run() { // 此方法会被 CController::endWidget() 调用 } }
下面是是BannerMagicWidget实现
<?php class BannerMagicWidget extends CWidget { public function run() { $random = rand(1,3); if ($random == 1) { $advert = "advert1.jpg"; } else if ($random == 2) { $advert = "advert2.jpg"; } else { $advert = "advert3.jpg"; } $this->render('bannermagic',array( "advert"=>$advert, )); } }
存储到protected\components\BannerMagicWidget.php
对应的view文件可能的内容如下:
代码如下:
存储到protected\components\views\bannermagic.php
3. 调用该Widget
代码如下:
widget('BannerMagicWidget'); ?>
希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。

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