ZendFramework tutorial-view component Zend_View usage _ php instance

This article mainly introduces the Zend_View usage of the view component in the ZendFramework tutorial, analyzes in detail the principle of trying to use the Zend_View component, and analyzes the usage skills of Zend_View in the form of instances, for more information about Zend_View, see the following example. We will share this with you for your reference. The details are as follows:

Zend_View is the view component of Zend Framework, which is the view layer in MVC. Zend_View is also the page that the application directly displays to the user. Here we will introduce the implementation class of Zend_View and how to combine it with Controller.

View implementation

The implementation of Zend_View is mainly implemented through the following Directory class:

Root @ coder-671T-M:/library/Zend # tree | grep View. php
│ ── View/
── View. php

Root @ coder-671T-M:/library/Zend/View # tree
.
├ ── Abstract. php
── Exception. php
── Helper
│ ├ ── Abstract. php
│ ── Action. php
│ ── BaseUrl. php
│ ── Currency. php
│ ── Cycle. php
│ ── DeclareVars. php
│ ── Doctype. php
│ ── Fieldset. php
│ ── FormButton. php
│ ── FormCheckbox. php
│ ── FormElement. php
│ ── FormErrors. php
│ ── FormFile. php
│ ── FormHidden. php
│ ── FormImage. php
│ ── FormLabel. php
│ ── FormMultiCheckbox. php
│ ── FormNote. php
│ ── FormPassword. php
│ ── Form. php
│ ── FormRadio. php
│ ── FormReset. php
│ ── FormSelect. php
│ ── FormSubmit. php
│ ── FormTextarea. php
│ ── FormText. php
│ ── Gravatar. php
│ ── HeadLink. php
│ ── HeadMeta. php
│ ── HeadScript. php
│ ── HeadStyle. php
│ ── HeadTitle. php
│ ── HtmlElement. php
│ ── HtmlFlash. php
│ ── HtmlList. php
│ ── HtmlObject. php
│ ── HtmlPage. php
│ ── HtmlQuicktime. php
│ ── InlineScript. php
│ ── Interface. php
│ ── Json. php
│ ├ ── Layout. php
│ ── Navigation
│ ── Breadcrumbs. php
│ ── HelperAbstract. php
│ ── Helper. php
│ ── Links. php
│ ── Menu. php
│ ── Sitemap. php
│ ── Navigation. php
│ ── PaginationControl. php
│ ── Partial
│ ── Exception. php
│ ── PartialLoop. php
│ ── Partial. php
│ ├ ── Placeholder
│ ── Iner
│ ── Abstract. php
│ ── Exception. php
│ └ ── Standalone. php
│ ── Container. php
│ ── Registry
│ ── Exception. php
│ ── Registry. php
│ ├ ── Placeholder. php
│ ├ ── RenderToPlaceholder. php
│ ── ServerUrl. php
│ ── TinySrc. php
│ ── Translate. php
│ ── Url. php
│ ── UserAgent. php
── Interface. php
── Stream. php

6 directories, 70 files

Integration of Zend_View and Zend_Controller

Mainly in the Zend_Controller_Action class,

/**   * Initialize View object   *   * Initializes {@link $view} if not otherwise a Zend_View_Interface.   *   * If {@link $view} is not otherwise set, instantiates a new Zend_View   * object, using the 'views' subdirectory at the same level as the   * controller directory for the current module as the base directory.   * It uses this to set the following:   * - script path = views/scripts/   * - helper path = views/helpers/   * - filter path = views/filters/   *   * @return Zend_View_Interface   * @throws Zend_Controller_Exception if base view directory does not exist   */  public function initView()  {    if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) {      return $this->view;    }    require_once 'Zend/View/Interface.php';    if (isset($this->view) && ($this->view instanceof Zend_View_Interface)) {      return $this->view;    }    $request = $this->getRequest();    $module = $request->getModuleName();    $dirs  = $this->getFrontController()->getControllerDirectory();    if (empty($module) || !isset($dirs[$module])) {      $module = $this->getFrontController()->getDispatcher()->getDefaultModule();    }    $baseDir = dirname($dirs[$module]) . DIRECTORY_SEPARATOR . 'views';    if (!file_exists($baseDir) || !is_dir($baseDir)) {      require_once 'Zend/Controller/Exception.php';      throw new Zend_Controller_Exception('Missing base view directory ("' . $baseDir . '")');    }    require_once 'Zend/View.php';    $this->view = new Zend_View(array('basePath' => $baseDir));    return $this->view;  }  /**   * Render a view   *   * Renders a view. By default, views are found in the view script path as   * 
 
  /.phtml. You may change the script suffix by   * resetting {@link $viewSuffix}. You may omit the controller directory   * prefix by specifying boolean true for $noController.   *   * By default, the rendered contents are appended to the response. You may   * specify the named body content segment to set by specifying a $name.   *   * @see Zend_Controller_Response_Abstract::appendBody()   * @param string|null $action Defaults to action registered in request object   * @param string|null $name Response object named path segment to use; defaults to null   * @param bool $noController Defaults to false; i.e. use controller name as subdir in which to search for view script   * @return void   */  public function render($action = null, $name = null, $noController = false)  {    if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) {      return $this->_helper->viewRenderer->render($action, $name, $noController);    }    $view  = $this->initView();    $script = $this->getViewScript($action, $noController);    $this->getResponse()->appendBody(      $view->render($script),      $name    );  }  /**   * Render a given view script   *   * Similar to {@link render()}, this method renders a view script. Unlike render(),   * however, it does not autodetermine the view script via {@link getViewScript()},   * but instead renders the script passed to it. Use this if you know the   * exact view script name and path you wish to use, or if using paths that do not   * conform to the spec defined with getViewScript().   *   * By default, the rendered contents are appended to the response. You may   * specify the named body content segment to set by specifying a $name.   *   * @param string $script   * @param string $name   * @return void   */  public function renderScript($script, $name = null)  {    if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) {      return $this->_helper->viewRenderer->renderScript($script, $name);    }    $view = $this->initView();    $this->getResponse()->appendBody(      $view->render($script),      $name    );  }
 

Zend_View.php class

<?php/** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category  Zend * @package  Zend_View * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com) * @license  http://framework.zend.com/license/new-bsd   New BSD License * @version  $Id: View.php 23775 2011-03-01 17:25:24Z ralph $ *//** * Abstract master class for extension. */require_once 'Zend/View/Abstract.php';/** * Concrete class for handling view scripts. * * @category  Zend * @package  Zend_View * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com) * @license  http://framework.zend.com/license/new-bsd   New BSD License */class Zend_View extends Zend_View_Abstract{  /**   * Whether or not to use streams to mimic short tags   * @var bool   */  private $_useViewStream = false;  /**   * Whether or not to use stream wrapper if short_open_tag is false   * @var bool   */  private $_useStreamWrapper = false;  /**   * Constructor   *   * Register Zend_View_Stream stream wrapper if short tags are disabled.   *   * @param array $config   * @return void   */  public function __construct($config = array())  {    $this->_useViewStream = (bool) ini_get('short_open_tag') ? false : true;    if ($this->_useViewStream) {      if (!in_array('zend.view', stream_get_wrappers())) {        require_once 'Zend/View/Stream.php';        stream_wrapper_register('zend.view', 'Zend_View_Stream');      }    }    if (array_key_exists('useStreamWrapper', $config)) {      $this->setUseStreamWrapper($config['useStreamWrapper']);    }    parent::__construct($config);  }  /**   * Set flag indicating if stream wrapper should be used if short_open_tag is off   *   * @param bool $flag   * @return Zend_View   */  public function setUseStreamWrapper($flag)  {    $this->_useStreamWrapper = (bool) $flag;    return $this;  }  /**   * Should the stream wrapper be used if short_open_tag is off?   *   * @return bool   */  public function useStreamWrapper()  {    return $this->_useStreamWrapper;  }  /**   * Includes the view script in a scope with only public $this variables.   *   * @param string The view script to execute.   */  protected function _run()  {    if ($this->_useViewStream && $this->useStreamWrapper()) {      include 'zend.view://' . func_get_arg(0);    } else {      include func_get_arg(0);    }  }}

By default, Zend_View is automatically instantiated through the Controller through the render method, and then rener to the corresponding View File. Of course, you can instantiate Zend_View and then use it.

By default, action is directed to the same file as action. to specify a view file, you can specify it using the $ this-> render method. you can also use addScriptPath and setScriptPath to set the directory of the View File.

For example

$ View = new Zend_View (); $ view-> addScriptPath ('/www/app/myview'); $ view-> addScriptPath ('/www/app/viewscomm '); // if you call $ view-> render ('example. php '), Zend_View will // first find "/www/app/myviews/example. php ", cannot find"/www/app/viewscomm/example. php ", if you still cannot find it, find the" example. php ".

Common Zend_View Methods

public function __construct($config = array())

Constructor Parameters

For example

array( 'escape' => array(), 'encoding' => array(),);

Common keys:

Escape, encoding, basePath, basePathPrefix, scriptPath, helperPath, helperPathPrefix, filterPath, filterPathPrefix, and filter
Public function getEngine () Return the template engine object

Public function init () initialization function

/*** Given a base path, sets the script, helper, and filter paths relative to it** Assumes a directory structure of:* * basePath/*   scripts/*   helpers/*   filters/* ** @param string $path* @param string $prefix Prefix to use for helper and filter paths* @return Zend_View_Abstract*/public function setBasePath($path, $classPrefix = 'Zend_View')/*** Given a base path, add script, helper, and filter paths relative to it** Assumes a directory structure of:* * basePath/*   scripts/*   helpers/*   filters/* ** @param string $path* @param string $prefix Prefix to use for helper and filter paths* @return Zend_View_Abstract*/public function addBasePath($path, $classPrefix = 'Zend_View')public function addScriptPath($path)Adds to the stack of view script paths in LIFO order.public function setScriptPath($path) Resets the stack of view script paths.public function getScriptPath($name)Return full path to a view script specified by $namepublic function getScriptPaths()Returns an array of all currently set script pathspublic function addHelperPath($path, $classPrefix = 'Zend_View_Helper_')Adds to the stack of helper paths in LIFO order.public function setHelperPath($path, $classPrefix = 'Zend_View_Helper_')Resets the stack of helper paths.public function getHelperPath($name) Get full path to a helper class file specified by $namepublic function getHelperPaths()Returns an array of all currently set helper pathspublic function getHelper($name) Get a helper by namepublic function getHelpers()Get array of all active helperspublic function getAllPaths() Return associative array of path types => pathspublic function setEscape($spec)/*** Assigns variables to the view script via differing strategies.** Zend_View::assign('name', $value) assigns a variable called 'name'* with the corresponding $value.** Zend_View::assign($array) assigns the array keys as variable* names (with the corresponding array values).** @see  __set()* @param string|array The assignment strategy to use.* @param mixed (Optional) If assigning a named variable, use this* as the value.* @return Zend_View_Abstract Fluent interface* @throws Zend_View_Exception if $spec is neither a string nor an array,* or if an attempt to set a private or protected member is detected*/public function assign($spec, $value = null)

The action in the controller can pass parameters to the View Script through assign.

For example

$this->view->assign('roles', $roles);$this->view->assign('num', $num);$this->view->assign('a', $a);

Or you can use

$this->view->roles=$roles;$this->view->a=$a;public function render($name) Processes a view script and returns the output.public function escape($var):Escapes a value for output in a view script.public function setEncoding($encoding) Set encoding to use with htmlentities() and htmlspecialchars()public function getEncoding() :Return current escape encoding

Common usage in view script files:

Get passed Value

$this->roles

Use some common helper methods:

$this->baseUrl();$this->url();$this->paginationControl();$this->partial()

Common View usage examples

In the init file of the bootstrap initialization view or controller

/** * Initialize the common view helper */protected function _initViewHelper(){  $boot=$this->bootstrap('View');  $view = $boot->getResource('View');        $view->setHelperPath('Sql/View/Helper', 'Sql_View_Helper');}

In action

/** * * @return void */public function listAction(){  $this->view->assign('data', $data);}

View File

List. phtml

<?php foreach ($this->data as $item) : ?>    <?php echo($item->item1);?><?php endforeach; ?>