hasChild() public abstract method Returns a value indicating whether the child already exists for the parent. public abstract boolean hasChild ( $parent, $child )$parent yii\rbac\Item $child yii\rbac\Item return boolean Whether $child is already a child of $parent

moveCursorBackward() public static method Moves the terminal cursor backward by sending ANSI control code CUB to the terminal. If the cursor is already at the edge of the screen, this has no effect. public static void moveCursorBackward ( $steps = 1 )$steps integer Number of steps the cursor should be moved backward

indexExists() public method Checks whether an index exists See also http://www.elastic.co/guide/en/elasticsearch/reference/current/indices-exists.html. public mixed indexExists ( $index )$index

offsetExists() public method Returns whether there is a header with the specified name. This method is required by the SPL interface ArrayAccess. It is implicitly called when you use something like isset($collection[$name]). public boolean offsetExists ( $name )$name string The header name return boolean Whether the named header exists

getHeaders() public method Returns the header collection. The header collection contains incoming HTTP headers. public yii\web\HeaderCollection getHeaders ( )return yii\web\HeaderCollection The header collection

hints() public method Returns the list of hint messages. The array keys are the attribute names, and the array values are the corresponding hint messages. Hint messages will be displayed to end users when they are filling the form for the generator. public array hints ( )return array The list of hint messages

showMeta() public method Sets whether to automatically perform 'SHOW META' for the search query. See also showMeta(). public $this showMeta ( $showMeta )$showMeta boolean|string|yii\db\Expression Whether to automatically perform 'SHOW META' return $this The query object itself

$nullDisplay public property The text to be displayed when formatting a null value. Defaults to '<span class="not-set">(not set)</span>', where (not set) will be translated according to $locale. public string $nullDisplay = null

info() public static method Logs an informative message. An informative message is typically logged by an application to keep record of something important (e.g. an administrator logs in). public static void info ( $message, $category = 'application' )$message string The message to be logged. $category string The category of the message.

challenge() public method Generates challenges upon authentication failure. For example, some appropriate HTTP headers may be generated. public void challenge ( $response )$response yii\web\Response