本文讲述了Zend Framework自定义Helper类相关注意事项。分享给大家供大家参考,具体如下:
编写自定义的Helper类
编写自定义的Helper类很容易,只要遵循以下几个原则即可:
① 类名必须是 Zend_View_Helper_*,*是helper的名称。例如,你在写一个名为“specialPurpose”的类,类名将至少是"SpecialPurpose",另外你还应该给类名加上前缀,建议将“View_Helper”作为前缀的一部份:“My_View_Helper_SpecialPurpose”。(注意大小写)你将需要将前缀(不包含下划线)传递给addHelperPath() 或 setHelperPath()。
② 类中必须有一个public的方法,该方法名与helper类名相同。这个方法将在你的模板调用"$this->specialPurpose()"时执行。在我们的“specialPurpose”例子中,相应的方法声明可以是 “public function specialPurpose()”。
③ 一般来说,Helper类不应该echo或print或有其它形式的输出。它只需要返回值就可以了。返回的数据应当被转义。
④ 类文件的命名应该是helper方法的名称,比如在"specialPurpose"例子中,文件要存为“SpecialPurpose.php”。
把helper类的文件放在你的helper路径下, Zend_View就会自动加载,实例化,持久化,并执行。
三点类文件名称,类名称,类中helper方法,保持某种程度上的一致。
贴代码:
两个helper,看清楚了,他们的不同啊。。。。。
version zf 1.10
Bootstrap.php
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class Bootstrap extends Zend_Application_Bootstrap_Bootstrap { protected function _initDoctype() { $this ->bootstrap ( 'view' ); $view = $this ->getResource ( 'view' ); $view ->doctype ( 'XHTML1_STRICT' ); } protected function _initView() { $view = new Zend_View (); $view ->setEncoding ( 'UTF-8' ); $view ->doctype ( 'XHTML1_STRICT' ); $view ->addHelperPath( '../application/views/helpers' , 'My_View_Helper' ); $viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer(); Zend_Controller_Action_HelperBroker::addHelper( $viewRenderer ); $viewRenderer ->setView( $view ); return $view ; } } |
application/views/helpers
Img.php:
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class Zend_View_Helper_Img extends Zend_View_Helper_Abstract { public function img() { return "this is a img" ; } } |
TestHelper.php:
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class My_View_Helper_TestHelper extends Zend_View_Helper_Abstract { public function testHelper() { return "this is a TestHelper" ; } } |
action中使用:
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<?php echo $this ->doctype() ?> <?php echo $this ->img() ?> <?php echo $this ->testHelper() ?> |
附加内容,在initView中添加addHelperPath,可以改成采用加载application。ini文件配置项的方式把路径进行配置。如下
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class Bootstrap extends Zend_Application_Bootstrap_Bootstrap { protected function _initDoctype() { $this ->bootstrap ( 'view' ); $view = $this ->getResource ( 'view' ); $view ->doctype ( 'XHTML1_STRICT' ); } protected function _initView() { $view = new Zend_View (); $view ->setEncoding ( 'UTF-8' ); $view ->doctype ( 'XHTML1_STRICT' ); $options = $this ->getOptions (); $viewOptions = $options [ 'resources' ][ 'view' ][ 'helperPath' ]; if ( is_array ( $viewOptions )) { foreach ( $viewOptions as $helperName => $path ) { $view ->addHelperPath ( $path , $helperName ); } } $viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer (); Zend_Controller_Action_HelperBroker::addHelper ( $viewRenderer ); $viewRenderer ->setView ( $view ); return $view ; } } |
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[production] phpSettings.display_startup_errors = 1 phpSettings.display_errors = 1 includePaths.library = APPLICATION_PATH "/../library" bootstrap.path = APPLICATION_PATH "/Bootstrap.php" bootstrap.class = "Bootstrap" appnamespace = "Application" resources.view[] = resources.view.helperPath.My_View_Helper = "../application/views/helpers" resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers" resources.frontController.params.displayExceptions = 1 [staging : production] [testing : production] phpSettings.display_startup_errors = 1 phpSettings.display_errors = 1 [development : production] phpSettings.display_startup_errors = 1 phpSettings.display_errors = 1 resources.frontController.params.displayExceptions = 1 |
希望本文所述对大家PHP程序设计有所帮助。