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

Class UrlValidator.

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# Public Properties

Property Description
allowAlias boolean – Whether the value can begin with an alias
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)
defaultScheme string – The default URI scheme.
enableClientValidation boolean – Whether to enable client-side validation for this validator.
enableIDN boolean – Whether validation process should take into account IDN (internationalized domain names).
except array, string – Scenarios that the validator should not be applied to.
isEmpty callable – A PHP callable that replaces the default implementation of isEmpty().
message string – The user-defined error message.
on array, string – Scenarios that the validator can be applied to.
pattern string – The regular expression used to validate the attribute value.
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.
validSchemes array – List of URI schemes which should be considered valid.
validationAttributes array – List of attribute names.
when callable – A PHP callable whose return value determines whether this validator should be applied.
whenClient string – A JavaScript function name whose return value determines whether this validator should be applied on the client-side.

# allowAlias

Default value

Whether the value can begin with an alias

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# 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 an object property.
__isset() Checks if a property is set, i.e. defined and not null.
__set() Sets value of an object property.
__unset() Sets an object property to 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.
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.

# __construct()


The default implementation does two things:

  • Initializes the object with the given configuration $config.
  • Call init().

If this method is overridden in a child class, it is recommended that

  • the last parameter of the constructor is a configuration array, like $config here.
  • call the parent implementation at the end of the constructor.

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  • $config (array) – Name-value pairs that will be used to initialize the object properties

# validateValue()

Validates a value.

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

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


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...',

return null;

for this example message template can contain {param1}, {formattedLimit}, {mimeTypes}, {param4}

Null should be returned if the data is valid.


# Protected Methods

Method Description
formatMessage() Formats a mesage using the I18N, or simple strtr if \Yii::$app is not available.