yii\mail\MessageInterface::setBcc PHP Method

setBcc() public method

Sets the Bcc (hidden copy receiver) addresses of this message.
public setBcc ( string | array $bcc )
$bcc string | array hidden copy receiver email address. You may pass an array of addresses if multiple recipients should receive this message. You may also specify receiver name in addition to email address using format: `[email => name]`.
    public function setBcc($bcc);