Class yii\base\Theme

All Classes | Properties | Methods

Inheritance	yii\base\Theme » yii\base\Component » yii\base\BaseObject
Implements	yii\base\Configurable
Available since version	2.0
Source Code	https://github.com/yiisoft/yii2/blob/master/framework/base/Theme.php

Theme represents an application theme.

When yii\base\View renders a view file, it will check the active theme to see if there is a themed version of the view file exists. If so, the themed version will be rendered instead.

A theme is a directory consisting of view files which are meant to replace their non-themed counterparts.

Theme uses $pathMap to achieve the view file replacement:

It first looks for a key in $pathMap that is a substring of the given view file path;
If such a key exists, the corresponding value will be used to replace the corresponding part in the view file path;
It will then check if the updated view file exists or not. If so, that file will be used to replace the original view file.
If Step 2 or 3 fails, the original view file will be used.

For example, if $pathMap is ['@app/views' => '@app/themes/basic'], then the themed version for a view file @app/views/site/index.php will be @app/themes/basic/site/index.php.

It is possible to map a single path to multiple paths. For example,

'pathMap' => [
    '@app/views' => [
        '@app/themes/christmas',
        '@app/themes/basic',
    ],
]

In this case, the themed version could be either @app/themes/christmas/site/index.php or @app/themes/basic/site/index.php. The former has precedence over the latter if both files exist.

To use a theme, you should configure the theme property of the "view" application component like the following:

'view' => [
    'theme' => [
        'basePath' => '@app/themes/basic',
        'baseUrl' => '@web/themes/basic',
    ],
],

The above configuration specifies a theme located under the "themes/basic" directory of the Web folder that contains the entry script of the application. If your theme is designed to handle modules, you may configure the $pathMap property like described above.

For more details and usage information on Theme, see the guide article on theming.

Public Properties

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Property	Type	Description	Defined By
$basePath	string	The root path of this theme. All resources of this theme are located under this directory.	yii\base\Theme
$baseUrl	string	The base URL (without ending slash) for this theme. All resources of this theme are considered to be under this base URL.	yii\base\Theme
$behaviors	yii\base\Behavior[]	List of behaviors attached to this component.	yii\base\Component
$pathMap	array\|null	The mapping between view directories and their corresponding themed versions.	yii\base\Theme

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	yii\base\Component
__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 a component property.	yii\base\Component
__isset()	Checks if a property is set, i.e. defined and not null.	yii\base\Component
__set()	Sets the value of a component property.	yii\base\Component
__unset()	Sets a component property to be null.	yii\base\Component
applyTo()	Converts a file to a themed file if possible.	yii\base\Theme
attachBehavior()	Attaches a behavior to this component.	yii\base\Component
attachBehaviors()	Attaches a list of behaviors to the component.	yii\base\Component
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\Component
canSetProperty()	Returns a value indicating whether a property can be set.	yii\base\Component
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
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.	yii\base\Component
getBasePath()		yii\base\Theme
getBaseUrl()		yii\base\Theme
getBehavior()	Returns the named behavior object.	yii\base\Component
getBehaviors()	Returns all behaviors attached to this component.	yii\base\Component
getPath()	Converts a relative file path into an absolute one using $basePath.	yii\base\Theme
getUrl()	Converts a relative URL into an absolute URL using $baseUrl.	yii\base\Theme
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\Component
hasProperty()	Returns a value indicating whether a property is defined for this component.	yii\base\Component
init()	Initializes the object.	yii\base\BaseObject
off()	Detaches an existing event handler from this component.	yii\base\Component
on()	Attaches an event handler to an event.	yii\base\Component
setBasePath()		yii\base\Theme
setBaseUrl()		yii\base\Theme
trigger()	Triggers an event.	yii\base\Component

Property Details

$basePath public property

The root path of this theme. All resources of this theme are located under this directory.

public string $basePath = null

$baseUrl public property

The base URL (without ending slash) for this theme. All resources of this theme are considered to be under this base URL.

public string $baseUrl = null

$pathMap public property

The mapping between view directories and their corresponding themed versions. This property is used by applyTo() when a view is trying to apply the theme. Path aliases can be used when specifying directories. If this property is empty or not set, a mapping yii\base\Application::$basePath to $basePath will be used.

public array|null $pathMap = null

Method Details

applyTo() public method

Converts a file to a themed file if possible.

If there is no corresponding themed file, the original file will be returned.

public string applyTo ( $path )
$path	string	The file to be themed
return	string	The themed file, or the original file if the themed version is not available.
throws	yii\base\InvalidConfigException	if $basePath is not set

getBasePath() public method

public void setBaseUrl ( $url )
$url	string	The base URL or path alias for this theme. All resources of this theme are considered to be under this base URL.

public string getBasePath ( )
return	string	The root path of this theme. All resources of this theme are located under this directory.

public string getBaseUrl ( )
return	string	The base URL (without ending slash) for this theme. All resources of this theme are considered to be under this base URL.

public string getPath ( $path )
$path	string	The relative file path to be converted.
return	string	The absolute file path
throws	yii\base\InvalidConfigException	if $basePath is not set

public string getUrl ( $url )
$url	string	The relative URL to be converted.
return	string	The absolute URL
throws	yii\base\InvalidConfigException	if $baseUrl is not set

public void setBasePath ( $path )
$path	string	The root path or path alias of this theme. All resources of this theme are located under this directory.