Home >Backend Development >PHP Tutorial >Zend Framework自定义Helper类相关注意事项总结_PHP

Zend Framework自定义Helper类相关注意事项总结_PHP

WBOY
WBOYOriginal
2016-05-28 11:48:13899browse

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:

<&#63;php echo $this->doctype() &#63;>
<&#63;php echo $this->img() &#63;>
<&#63;php echo $this->testHelper() &#63;>

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。

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn