Class yii\base\View
Inheritance | yii\base\View » yii\base\Component » yii\base\BaseObject |
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Implements | yii\base\Configurable, yii\base\DynamicContentAwareInterface |
Subclasses | yii\web\View |
Available since version | 2.0 |
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/base/View.php |
View represents a view object in the MVC pattern.
View provides a set of methods (e.g. render()) for rendering purpose.
For more details and usage information on View, see the guide article on views.
Public Properties
Property | Type | Description | Defined By |
---|---|---|---|
$behaviors | yii\base\Behavior[] | List of behaviors attached to this component. This property is read-only. | yii\base\Component |
$blocks | array | A list of named output blocks. | yii\base\View |
$cacheStack | array|yii\base\DynamicContentAwareInterface[] | A list of currently active dynamic content class instances. | yii\base\View |
$context | yii\base\ViewContextInterface | The context under which the renderFile() method is being invoked. | yii\base\View |
$defaultExtension | string | The default view file extension. | yii\base\View |
$dynamicContents | yii\base\DynamicContentAwareInterface[] | Class instances supporting dynamic contents. | yii\base\View |
$dynamicPlaceholders | array | A list of placeholders for embedding dynamic contents. | yii\base\View |
$params | array | Custom parameters that are shared among view templates. | yii\base\View |
$renderers | array | A list of available renderers indexed by their corresponding supported file extensions. | yii\base\View |
$theme | yii\base\Theme|array|string | The theme object or the configuration for creating the theme object. | yii\base\View |
$viewFile | string|boolean | The view file currently being rendered. False if no view file is being rendered. This property is read-only. | yii\base\View |
Public Methods
Method | Description | Defined By |
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__call() | Calls the named method which is not a class method. | yii\base\BaseObject |
__clone() | This method is called after the object is created by cloning an existing one. | yii\base\Component |
__construct() | Constructor. | yii\base\BaseObject |
__get() | Returns the value of an object property. | yii\base\BaseObject |
__isset() | Checks if a property is set, i.e. defined and not null. | yii\base\BaseObject |
__set() | Sets value of an object property. | yii\base\BaseObject |
__unset() | Sets an object property to null. | yii\base\BaseObject |
addDynamicPlaceholder() | Adds a placeholder for dynamic content. | yii\base\View |
afterRender() | This method is invoked right after renderFile() renders a view file. | yii\base\View |
attachBehavior() | Attaches a behavior to this component. | yii\base\Component |
attachBehaviors() | Attaches a list of behaviors to the component. | yii\base\Component |
beforeRender() | This method is invoked right before renderFile() renders a view file. | yii\base\View |
beginBlock() | Begins recording a block. | yii\base\View |
beginCache() | Begins fragment caching. | yii\base\View |
beginContent() | Begins the rendering of content that is to be decorated by the specified view. | yii\base\View |
beginPage() | Marks the beginning of a page. | yii\base\View |
behaviors() | Returns a list of behaviors that this component should behave as. | yii\base\Component |
canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\BaseObject |
canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\BaseObject |
className() | Returns the fully qualified name of this class. | yii\base\BaseObject |
detachBehavior() | Detaches a behavior from the component. | yii\base\Component |
detachBehaviors() | Detaches all behaviors from the component. | yii\base\Component |
endBlock() | Ends recording a block. | yii\base\View |
endCache() | Ends fragment caching. | yii\base\View |
endContent() | Ends the rendering of content. | yii\base\View |
endPage() | Marks the ending of a page. | yii\base\View |
ensureBehaviors() | Makes sure that the behaviors declared in behaviors() are attached to this component. | yii\base\Component |
evaluateDynamicContent() | Evaluates the given PHP statements. | yii\base\View |
getBehavior() | Returns the named behavior object. | yii\base\Component |
getBehaviors() | Returns all behaviors attached to this component. | yii\base\Component |
getDynamicContents() | Returns a list of currently active dynamic content class instances. | yii\base\View |
getDynamicPlaceholders() | Returns a list of placeholders for dynamic content. This method is used internally to implement the content caching feature. | yii\base\View |
getViewFile() | yii\base\View | |
hasEventHandlers() | Returns a value indicating whether there is any handler attached to the named event. | yii\base\Component |
hasMethod() | Returns a value indicating whether a method is defined. | yii\base\BaseObject |
hasProperty() | Returns a value indicating whether a property is defined. | yii\base\BaseObject |
init() | Initializes the view component. | yii\base\View |
off() | Detaches an existing event handler from this component. | yii\base\Component |
on() | Attaches an event handler to an event. | yii\base\Component |
popDynamicContent() | Removes a last class instance supporting dynamic contents from a list of currently active dynamic content class instances. | yii\base\View |
pushDynamicContent() | Adds a class instance supporting dynamic contents to the end of a list of currently active dynamic content class instances. | yii\base\View |
render() | Renders a view. | yii\base\View |
renderDynamic() | Renders dynamic content returned by the given PHP statements. | yii\base\View |
renderFile() | Renders a view file. | yii\base\View |
renderPhpFile() | Renders a view file as a PHP script. | yii\base\View |
setDynamicPlaceholders() | Sets a list of placeholders for dynamic content. This method is used internally to implement the content caching feature. | yii\base\View |
trigger() | Triggers an event. | yii\base\Component |
Protected Methods
Method | Description | Defined By |
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findViewFile() | Finds the view file based on the given view name. | yii\base\View |
getRequestedViewFile() | yii\base\View |
Events
Event | Type | Description | Defined By |
---|---|---|---|
EVENT_AFTER_RENDER | yii\base\ViewEvent | An event that is triggered by renderFile() right after it renders a view file. | yii\base\View |
EVENT_BEFORE_RENDER | yii\base\ViewEvent | An event that is triggered by renderFile() right before it renders a view file. | yii\base\View |
EVENT_BEGIN_PAGE | yii\base\Event | An event that is triggered by beginPage(). | yii\base\View |
EVENT_END_PAGE | yii\base\Event | An event that is triggered by endPage(). | yii\base\View |
Property Details
A list of named output blocks. The keys are the block names and the values are the corresponding block content. You can call beginBlock() and endBlock() to capture small fragments of a view. They can be later accessed somewhere else through this property.
A list of currently active dynamic content class instances. This property is used internally to implement the dynamic content caching feature. Do not modify it directly.
The context under which the renderFile() method is being invoked.
The default view file extension. This will be appended to view file names if they don't have file extensions.
Class instances supporting dynamic contents.
A list of placeholders for embedding dynamic contents. This property is used internally to implement the content caching feature. Do not modify it directly.
Custom parameters that are shared among view templates.
A list of available renderers indexed by their corresponding supported file extensions. Each renderer may be a view renderer object or the configuration for creating the renderer object. For example, the following configuration enables both Smarty and Twig view renderers:
[
'tpl' => ['class' => 'yii\smarty\ViewRenderer'],
'twig' => ['class' => 'yii\twig\ViewRenderer'],
]
If no renderer is available for the given view file, the view file will be treated as a normal PHP and rendered via renderPhpFile().
The theme object or the configuration for creating the theme object. If not set, it means theming is not enabled.
The view file currently being rendered. False if no view file is being rendered. This property is read-only.
Method Details
Adds a placeholder for dynamic content.
This method is used internally to implement the content caching feature.
public void addDynamicPlaceholder ( $placeholder, $statements ) | ||
$placeholder | ||
$statements | string | The PHP statements for generating the dynamic content. |
This method is invoked right after renderFile() renders a view file.
The default implementation will trigger the EVENT_AFTER_RENDER event. If you override this method, make sure you call the parent implementation first.
public void afterRender ( $viewFile, $params, &$output ) | ||
$viewFile | string | The view file being rendered. |
$params | array | The parameter array passed to the render() method. |
$output | string | The rendering result of the view file. Updates to this parameter will be passed back and returned by renderFile(). |
This method is invoked right before renderFile() renders a view file.
The default implementation will trigger the EVENT_BEFORE_RENDER event. If you override this method, make sure you call the parent implementation first.
public boolean beforeRender ( $viewFile, $params ) | ||
$viewFile | string | The view file to be rendered. |
$params | array | The parameter array passed to the render() method. |
return | boolean | Whether to continue rendering the view file. |
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Begins recording a block.
This method is a shortcut to beginning yii\widgets\Block.
public yii\widgets\Block beginBlock ( $id, $renderInPlace = false ) | ||
$id | string | The block ID. |
$renderInPlace | boolean | Whether to render the block content in place. Defaults to false, meaning the captured block will not be displayed. |
return | yii\widgets\Block | The Block widget instance |
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Begins fragment caching.
This method will display cached content if it is available. If not, it will start caching and would expect an endCache() call to end the cache and save the content into cache. A typical usage of fragment caching is as follows,
if ($this->beginCache($id)) {
// ...generate content here
$this->endCache();
}
public boolean beginCache ( $id, $properties = [] ) | ||
$id | string | A unique ID identifying the fragment to be cached. |
$properties | array | Initial property values for yii\widgets\FragmentCache |
return | boolean | Whether you should generate the content for caching. False if the cached version is available. |
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Begins the rendering of content that is to be decorated by the specified view.
This method can be used to implement nested layout. For example, a layout can be embedded in another layout file specified as '@app/views/layouts/base.php' like the following:
<?php $this->beginContent('@app/views/layouts/base.php'); ?>
//...layout content here...
<?php $this->endContent(); ?>
See also yii\widgets\ContentDecorator.
public yii\widgets\ContentDecorator beginContent ( $viewFile, $params = [] ) | ||
$viewFile | string | The view file that will be used to decorate the content enclosed by this widget. This can be specified as either the view file path or path alias. |
$params | array | The variables (name => value) to be extracted and made available in the decorative view. |
return | yii\widgets\ContentDecorator | The ContentDecorator widget instance |
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Marks the beginning of a page.
public void beginPage ( ) |
Ends recording a block.
public void endBlock ( ) |
Ends fragment caching.
public void endCache ( ) |
Ends the rendering of content.
public void endContent ( ) |
Marks the ending of a page.
public void endPage ( ) |
Evaluates the given PHP statements.
This method is mainly used internally to implement dynamic content feature.
public mixed evaluateDynamicContent ( $statements ) | ||
$statements | string | The PHP statements to be evaluated. |
return | mixed | The return value of the PHP statements. |
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Finds the view file based on the given view name.
protected string findViewFile ( $view, $context = null ) | ||
$view | string | The view name or the path alias of the view file. Please refer to render() on how to specify this parameter. |
$context | object | The context to be assigned to the view and can later be accessed via $context in the view. If the context implements yii\base\ViewContextInterface, it may also be used to locate the view file corresponding to a relative view name. |
return | string | The view file path. Note that the file may not exist. |
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throws | yii\base\InvalidCallException | if a relative view name is given while there is no active context to determine the corresponding view file. |
Returns a list of currently active dynamic content class instances.
public yii\base\DynamicContentAwareInterface[] getDynamicContents ( ) | ||
return | yii\base\DynamicContentAwareInterface[] | Class instances supporting dynamic contents. |
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Returns a list of placeholders for dynamic content. This method is used internally to implement the content caching feature.
public array getDynamicPlaceholders ( ) | ||
return | array | A list of placeholders. |
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protected string|boolean getRequestedViewFile ( ) | ||
return | string|boolean | The requested view currently being rendered. False if no view file is being rendered. |
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public string|boolean getViewFile ( ) | ||
return | string|boolean | The view file currently being rendered. False if no view file is being rendered. |
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Initializes the view component.
public void init ( ) |
Removes a last class instance supporting dynamic contents from a list of currently active dynamic content class instances.
public void popDynamicContent ( ) |
Adds a class instance supporting dynamic contents to the end of a list of currently active dynamic content class instances.
public void pushDynamicContent ( yii\base\DynamicContentAwareInterface $instance ) | ||
$instance | yii\base\DynamicContentAwareInterface | Class instance supporting dynamic contents. |
Renders a view.
The view to be rendered can be specified in one of the following formats:
- path alias (e.g. "@app/views/site/index");
- absolute path within application (e.g. "//site/index"): the view name starts with double slashes. The actual view file will be looked for under the view path of the application.
- absolute path within current module (e.g. "/site/index"): the view name starts with a single slash. The actual view file will be looked for under the view path of the current module.
- relative view (e.g. "index"): the view name does not start with
@
or/
. The corresponding view file will be looked for under the view path of the view$context
. If$context
is not given, it will be looked for under the directory containing the view currently being rendered (i.e., this happens when rendering a view within another view).
See also renderFile().
public string render ( $view, $params = [], $context = null ) | ||
$view | string | The view name. |
$params | array | The parameters (name-value pairs) that will be extracted and made available in the view file. |
$context | object | The context to be assigned to the view and can later be accessed via $context in the view. If the context implements yii\base\ViewContextInterface, it may also be used to locate the view file corresponding to a relative view name. |
return | string | The rendering result |
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throws | yii\base\ViewNotFoundException | if the view file does not exist. |
throws | yii\base\InvalidCallException | if the view cannot be resolved. |
Renders dynamic content returned by the given PHP statements.
This method is mainly used together with content caching (fragment caching and page caching) when some portions of the content (called dynamic content) should not be cached. The dynamic content must be returned by some PHP statements.
public string renderDynamic ( $statements ) | ||
$statements | string | The PHP statements for generating the dynamic content. |
return | string | The placeholder of the dynamic content, or the dynamic content if there is no active content cache currently. Note that most methods that indirectly modify layout such as registerJS() or registerJSFile() do not work with dynamic rendering. |
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Renders a view file.
If $theme is enabled (not null), it will try to render the themed version of the view file as long as it is available.
The method will call yii\helpers\FileHelper::localize() to localize the view file.
If renderer is enabled (not null), the method will use it to render the view file. Otherwise, it will simply include the view file as a normal PHP file, capture its output and return it as a string.
public string renderFile ( $viewFile, $params = [], $context = null ) | ||
$viewFile | string | The view file. This can be either an absolute file path or an alias of it. |
$params | array | The parameters (name-value pairs) that will be extracted and made available in the view file. |
$context | object | The context that the view should use for rendering the view. If null, existing $context will be used. |
return | string | The rendering result |
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throws | yii\base\ViewNotFoundException | if the view file does not exist |
Renders a view file as a PHP script.
This method treats the view file as a PHP script and includes the file. It extracts the given parameters and makes them available in the view file. The method captures the output of the included view file and returns it as a string.
This method should mainly be called by view renderer or renderFile().
public string renderPhpFile ( $_file_, $_params_ = [] ) | ||
$_file_ | string | The view file. |
$_params_ | array | The parameters (name-value pairs) that will be extracted and made available in the view file. |
return | string | The rendering result |
---|---|---|
throws | Exception | |
throws | \Throwable |
Sets a list of placeholders for dynamic content. This method is used internally to implement the content caching feature.
public void setDynamicPlaceholders ( $placeholders ) | ||
$placeholders | array | A list of placeholders. |
Event Details
An event that is triggered by renderFile() right after it renders a view file.
An event that is triggered by renderFile() right before it renders a view file.
An event that is triggered by beginPage().
An event that is triggered by endPage().