Zend Framework自定义Helper类相关注意事项总结_PHP
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
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:
class Zend_View_Helper_Img extends Zend_View_Helper_Abstract { public function img() { return "this is a img"; } }
TestHelper.php:
class My_View_Helper_TestHelper extends Zend_View_Helper_Abstract { public function testHelper() { return "this is a TestHelper"; } }
action中使用:
<?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
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; } }
[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
更多关于zend相关内容感兴趣的读者可查看本站专题:《Zend FrameWork框架入门教程》、《php优秀开发框架总结》、《Yii框架入门及常用技巧总结》、《ThinkPHP入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。

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