StringValidator

Type

Class

Namespace

craft\validators

Inherits

craft\validators\StringValidator » yii\validators\StringValidator » yii\validators\Validator » yii\base\Component » yii\base\BaseObject

Implements

yii\base\Configurable

Since

3.0.0

Class StringValidator.

View source

Public Properties

Property	Description
attributeNames	array – Attribute names.
attributes	array, string – Attributes to be validated by this validator.
behaviors	yii\base\Behavior – List of behaviors attached to this component.
builtInValidators	array – List of built-in validators (name => class or configuration)
containsMb4	string – User-defined error message used when the value contains 4+ byte characters (like emoji) and the database doesn’t support it.
disallowMb4	boolean – Whether the string should be checked for 4+ byte characters (like emoji)
enableClientValidation	boolean – Whether to enable client-side validation for this validator.
encoding	string, null – The encoding of the string value to be validated (e.g. 'UTF-8').
except	array, string – Scenarios that the validator should not be applied to.
isEmpty	callable, null – A PHP callable that replaces the default implementation of isEmpty().
length	integer, array – Specifies the length limit of the value to be validated.
max	integer, null – Maximum length.
message	string – User-defined error message used when the value is not a string.
min	integer, null – Minimum length.
notEqual	string – User-defined error message used when the length of the value is not equal to length.
on	array, string – Scenarios that the validator can be applied to.
skipOnEmpty	boolean – Whether this validation rule should be skipped if the attribute value is null or an empty string.
skipOnError	boolean – Whether this validation rule should be skipped if the attribute being validated already has some validation error according to some previous rules.
strict	boolean – Whether to require the value to be a string data type.
tooLong	string – User-defined error message used when the length of the value is greater than max.
tooShort	string – User-defined error message used when the length of the value is smaller than min.
trim	boolean – Whether the string should be trimmed of whitespace
validationAttributes	array, null – List of attribute names.
when	callable, null – A PHP callable whose return value determines whether this validator should be applied.
whenClient	string, null – A JavaScript function name whose return value determines whether this validator should be applied on the client-side.

containsMb4

Type

string

Default value

null

User-defined error message used when the value contains 4+ byte characters (like emoji) and the database doesn’t support it.

View source

disallowMb4

Type

boolean

Default value

false

Whether the string should be checked for 4+ byte characters (like emoji)

View source

trim

DEPRECATED

Deprecated in 3.0.32. Use Yii’s 'trim' validator instead.

Type

boolean

Default value

false

Since

3.0.18

Whether the string should be trimmed of whitespace

View source

Public Methods

Method	Description
__call()	Calls the named method which is not a class method.
__clone()	This method is called after the object is created by cloning an existing one.
__construct()	Constructor.
__get()	Returns the value of a component property.
__isset()	Checks if a property is set, i.e. defined and not null.
__set()	Sets the value of a component property.
__unset()	Sets a component property to be null.
addError()	Adds an error about the specified attribute to the model object.
attachBehavior()	Attaches a behavior to this component.
attachBehaviors()	Attaches a list of behaviors to the component.
behaviors()	Returns a list of behaviors that this component should behave as.
canGetProperty()	Returns a value indicating whether a property can be read.
canSetProperty()	Returns a value indicating whether a property can be set.
className()	Returns the fully qualified name of this class.
clientValidateAttribute()	Returns the JavaScript needed for performing client-side validation.
createValidator()	Creates a validator object.
detachBehavior()	Detaches a behavior from the component.
detachBehaviors()	Detaches all behaviors from the component.
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.
getAttributeNames()	Returns cleaned attribute names without the ! character at the beginning.
getBehavior()	Returns the named behavior object.
getBehaviors()	Returns all behaviors attached to this component.
getClientOptions()	Returns the client-side validation options.
getValidationAttributes()	Returns a list of attributes this validator applies to.
hasEventHandlers()	Returns a value indicating whether there is any handler attached to the named event.
hasMethod()	Returns a value indicating whether a method is defined.
hasProperty()	Returns a value indicating whether a property is defined for this component.
init()	Initializes the object.
isActive()	Returns a value indicating whether the validator is active for the given scenario and attribute.
isEmpty()	Checks if the given value is empty.
off()	Detaches an existing event handler from this component.
on()	Attaches an event handler to an event.
trigger()	Triggers an event.
validate()	Validates a given value.
validateAttribute()	Validates a single attribute.
validateAttributes()	Validates the specified object.
validateValue()	Validates a value.

init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

View source

validateAttribute()

Validates a single attribute.

Child classes must implement this method to provide the actual validation logic.

View source

Arguments

• $model (yii\base\Model) – The data model to be validated
• $attribute (string) – The name of the attribute to be validated.

validateValue()

Validates a value.

A validator class can implement this method to support data validation out of the context of a data model.

View source

Arguments

• $value (mixed) – The data value to be validated.

Returns

array, null – The error message and the array of parameters to be inserted into the error message.

if (!$valid) {
return [$this->message, [
'param1' => $this->param1,
'formattedLimit' => Yii::$app->formatter->asShortSize($this->getSizeLimit()),
'mimeTypes' => implode(', ', $this->mimeTypes),
'param4' => 'etc...',
]];
}

#### Throws

- [yii\base\NotSupportedException](https://www.yiiframework.com/doc/api/2.0/yii-base-notsupportedexception)\
  if the validator does not supporting data validation without a model




## Protected Methods

| Method                                                                                                                                            | Description
| ------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------
| [formatMessage()](https://www.yiiframework.com/doc/api/2.0/yii-validators-validator#formatMessage()-detail "Defined by yii\validators\Validator") | Formats a mesage using the I18N, or simple strtr if `\Yii::$app` is not available.