Class yii\captcha\CaptchaAction

所有类 | 属性 | 方法 | 常量

继承	yii\captcha\CaptchaAction » yii\base\Action » yii\base\Component » yii\base\BaseObject
实现	yii\base\Configurable
可用版本自	2.0
源码	https://github.com/yiichina/yii2/blob/api/framework/captcha/CaptchaAction.php

CaptchaAction renders a CAPTCHA image.

CaptchaAction is used together with yii\captcha\Captcha and yii\captcha\CaptchaValidator to provide the CAPTCHA feature.

By configuring the properties of CaptchaAction, you may customize the appearance of the generated CAPTCHA images, such as the font color, the background color, etc.

Note that CaptchaAction requires either GD2 extension or ImageMagick PHP extension.

Using CAPTCHA involves the following steps:

Override yii\web\Controller::actions() and register an action of class CaptchaAction with ID 'captcha'
In the form model, declare an attribute to store user-entered verification code, and declare the attribute to be validated by the 'captcha' validator.
In the controller view, insert a yii\captcha\Captcha widget in the form.

公共属性

隐藏继承的属性

属性	类型	描述	被定义在
$backColor	integer	The background color.	yii\captcha\CaptchaAction
$behaviors	yii\base\Behavior[]	List of behaviors attached to this component	yii\base\Component
$controller	yii\base\Controller\|yii\web\Controller\|yii\console\Controller	拥有此操作的控制器	yii\base\Action
$fixedVerifyCode	string	The fixed verification code.	yii\captcha\CaptchaAction
$fontFile	string	The TrueType font file.	yii\captcha\CaptchaAction
$foreColor	integer	The font color.	yii\captcha\CaptchaAction
$height	integer	The height of the generated CAPTCHA image.	yii\captcha\CaptchaAction
$id	string	动作的 ID	yii\base\Action
$imageLibrary	string	The rendering library to use.	yii\captcha\CaptchaAction
$maxLength	integer	The maximum length for randomly generated word.	yii\captcha\CaptchaAction
$minLength	integer	The minimum length for randomly generated word.	yii\captcha\CaptchaAction
$offset	integer	The offset between characters.	yii\captcha\CaptchaAction
$padding	integer	Padding around the text.	yii\captcha\CaptchaAction
$testLimit	integer	How many times should the same CAPTCHA be displayed.	yii\captcha\CaptchaAction
$transparent	boolean	Whether to use transparent background.	yii\captcha\CaptchaAction
$uniqueId	string	整个应用程序中此操作的唯一 ID。	yii\base\Action
$verifyCode	string	The verification code.	yii\captcha\CaptchaAction
$width	integer	The width of the generated CAPTCHA image.	yii\captcha\CaptchaAction

公共方法

隐藏继承的方法

方法	描述	被定义在
__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()	构造函数。	yii\base\Action
__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
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
generateValidationHash()	Generates a hash code that can be used for client-side validation.	yii\captcha\CaptchaAction
getBehavior()	Returns the named behavior object.	yii\base\Component
getBehaviors()	Returns all behaviors attached to this component.	yii\base\Component
getUniqueId()	返回整个应用程序中此动作的唯一 ID。	yii\base\Action
getVerifyCode()	Gets the verification code.	yii\captcha\CaptchaAction
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 action.	yii\captcha\CaptchaAction
off()	Detaches an existing event handler from this component.	yii\base\Component
on()	Attaches an event handler to an event.	yii\base\Component
run()	Runs the action.	yii\captcha\CaptchaAction
runWithParams()	使用指定的参数运行此动作。该方法主要由控制器调用。	yii\base\Action
trigger()	Triggers an event.	yii\base\Component
validate()	Validates the input to see if it matches the generated code.	yii\captcha\CaptchaAction

受保护的方法

隐藏继承的方法

方法	描述	被定义在
afterRun()	执行 `run()` 后立即调用此方法。您可以重写此方法以对动作运行执行后处理工作。	yii\base\Action
beforeRun()	在执行 `run()` 之前调用此方法。您可以重写此方法来为动作运行做准备工作。如果该方法返回 false，将取消该动作。	yii\base\Action
generateVerifyCode()	Generates a new verification code.	yii\captcha\CaptchaAction
getSessionKey()	Returns the session variable name used to store verification code.	yii\captcha\CaptchaAction
renderImage()	Renders the CAPTCHA image.	yii\captcha\CaptchaAction
renderImageByGD()	Renders the CAPTCHA image based on the code using GD library.	yii\captcha\CaptchaAction
renderImageByImagick()	Renders the CAPTCHA image based on the code using ImageMagick library.	yii\captcha\CaptchaAction
setHttpHeaders()	设置图像响应所需的 HTTP 头信息。	yii\captcha\CaptchaAction

常量

隐藏继承的常量

常量	值	描述	被定义在
REFRESH_GET_VAR	'refresh'	The name of the GET parameter indicating whether the CAPTCHA image should be regenerated.	yii\captcha\CaptchaAction

属性详情

$backColor 公共属性

The background color. For example, 0x55FF00. Defaults to 0xFFFFFF, meaning white color.

public integer $backColor = 0xFFFFFF

$fixedVerifyCode 公共属性

The fixed verification code. When this property is set, getVerifyCode() will always return the value of this property. This is mainly used in automated tests where we want to be able to reproduce the same verification code each time we run the tests. If not set, it means the verification code will be randomly generated.

public string $fixedVerifyCode = null

$fontFile 公共属性

The TrueType font file. This can be either a file path or path alias.

public string $fontFile = '@yii/captcha/SpicyRice.ttf'

$foreColor 公共属性

The font color. For example, 0x55FF00. Defaults to 0x2040A0 (blue color).

public integer $foreColor = 0x2040A0

$height 公共属性

The height of the generated CAPTCHA image. Defaults to 50.

public integer $height = 50

$imageLibrary 公共属性（自版本 2.0.7 可用）

The rendering library to use. Currently supported only 'gd' and 'imagick'. If not set, library will be determined automatically.

public string $imageLibrary = null

$maxLength 公共属性

The maximum length for randomly generated word. Defaults to 7.

public integer $maxLength = 7

$minLength 公共属性

The minimum length for randomly generated word. Defaults to 6.

public integer $minLength = 6

$offset 公共属性

The offset between characters. Defaults to -2. You can adjust this property in order to decrease or increase the readability of the captcha.

public integer $offset = -2

$padding 公共属性

Padding around the text. Defaults to 2.

public integer $padding = 2

$testLimit 公共属性

How many times should the same CAPTCHA be displayed. Defaults to 3. A value less than or equal to 0 means the test is unlimited (available since version 1.1.2).

public integer $testLimit = 3

$transparent 公共属性

Whether to use transparent background. Defaults to false.

public boolean $transparent = false

$verifyCode 公共只读属性

The verification code.

public string getVerifyCode ( $regenerate = false )

$width 公共属性

The width of the generated CAPTCHA image. Defaults to 120.

public integer $width = 120

方法详情

generateValidationHash() 公共方法

Generates a hash code that can be used for client-side validation.

public string generateValidationHash($code)
$code	string	The CAPTCHA code
return	string	A hash code generated from the CAPTCHA code

generateVerifyCode() 受保护方法

Generates a new verification code.

protected string generateVerifyCode()
return	string	The generated verification code

getSessionKey() 受保护方法

Returns the session variable name used to store verification code.

protected string getSessionKey()
return	string	The session variable name

getVerifyCode() 公共方法

Gets the verification code.

public string getVerifyCode($regenerate = false)
$regenerate	boolean	Whether the verification code should be regenerated.
return	string	The verification code.

init() 公共方法

Initializes the action.

public void init()
throws	yii\base\InvalidConfigException	if the font file does not exist.

renderImage() 受保护方法

Renders the CAPTCHA image.

protected string renderImage($code)
$code	string	The verification code
return	string	Image contents
throws	yii\base\InvalidConfigException	if imageLibrary is not supported

renderImageByGD() 受保护方法

Renders the CAPTCHA image based on the code using GD library.

protected string renderImageByGD($code)
$code	string	The verification code
return	string	Image contents in PNG format.

renderImageByImagick() 受保护方法

Renders the CAPTCHA image based on the code using ImageMagick library.

protected string renderImageByImagick($code)
$code	string	The verification code
return	string	Image contents in PNG format.

run() 公共方法

Runs the action.

public void run()

setHttpHeaders() 受保护方法

设置图像响应所需的 HTTP 头信息。

protected void setHttpHeaders()

validate() 公共方法

Validates the input to see if it matches the generated code.

public boolean validate($input, $caseSensitive)
$input	string	User input
$caseSensitive	boolean	Whether the comparison should be case-sensitive
return	boolean	Whether the input is valid