framework/log/Target.php
public function getMessagePrefix($message)
    {
        if ($this->prefix !== null) {
            return call_user_func($this->prefix, $message);
        }

        if (Yii::$app === null) {
            return '';
        }

        $request = Yii::$app->getRequest();
        $ip = $request instanceof Request ? $request->getUserIP() : '-';

        /* @var $user \yii\web\User */
        $user = Yii::$app->has('user', true) ? Yii::$app->get('user') : null;
        if ($user && ($identity = $user->getIdentity(false))) {
            $userID = $identity->getId();
        } else {
            $userID = '-';
        }

        /* @var $session \yii\web\Session */
        $session = Yii::$app->has('session', true) ? Yii::$app->get('session') : null;
        $sessionID = $session && $session->getIsActive() ? $session->getId() : '-';

        return "[$ip][$userID][$sessionID]";
    }
public function getMessagePrefix($message)
    {
        if ($this->prefix !== null) {
            return call_user_func($this->prefix, $message);
        }

        if (Yii::$app === null) {
            return '';
        }

        $request = Yii::$app->getRequest();
        $ip = $request instanceof Request ? $request->getUserIP() : '-';

        /* @var $user \yii\web\User */
        $user = Yii::$app->has('user', true) ? Yii::$app->get('user') : null;
        if ($user && ($identity = $user->getIdentity(false))) {
            $userID = $identity->getId();
        } else {
            $userID = '-';
        }

        /* @var $session \yii\web\Session */
        $session = Yii::$app->has('session', true) ? Yii::$app->get('session') : null;
        $sessionID = $session && $session->getIsActive() ? $session->getId() : '-';

        return "[$ip][$userID][$sessionID]";
    }
public function getMessagePrefix ( $ message ) { if ( $ this -> prefix !== null ) { return call_user_func ( $ this -> prefix , $ message ) ; } if ( Yii :: $ app === null ) { return '' ; } $ request = Yii :: $ app -> getRequest ( ) ; $ ip = $ request instanceof Request ? $ request -> getUserIP ( ) : '-' ; /* @var $user \yii\web\User */ $ user = Yii :: $ app -> has ( 'user' , true ) ? Yii :: $ app -> get ( 'user' ) : null ; if ( $ user && ( $ identity = $ user -> getIdentity ( false ) ) ) { $ userID = $ identity -> getId ( ) ; } else { $ userID = '-' ; } /* @var $session \yii\web\Session */ $ session = Yii :: $ app -> has ( 'session' , true ) ? Yii :: $ app -> get ( 'session' ) : null ; $ sessionID = $ session && $ session -> getIsActive ( ) ? $ session -> getId ( ) : '-' ; return "[$ip][$userID][$sessionID]" ; }
Returns a string to be prefixed to the given message.
If [[prefix]] is configured it will return the result of the callback.
The default implementation will return user IP, user ID and session ID as a prefix.
@param array $message the message being exported.
The message structure follows that in [[Logger::messages]].
@return string the prefix string
Returns a string to be prefixed to the given message . If [[ prefix ]] is configured it will return the result of the callback . The default implementation will return user IP user ID and session ID as a prefix .