public function getSessionId()
    {
        if($this->startSession && !$this->session->isStarted()) {
            $this->session->start();
        }

        if ($this->session->isStarted()) {
            // We assume the sessionId contains data and has to be protected,
            // so we use a salted SHA1 checksum.
            return sha1($this->secret . $this->session->getId());
            // In the end this method will be called for _each_ log message.
            // If the session id would be constant and accessible through the whole request,
            // this would not be necessary.
        }

        return null;
    }
public function getSessionId()
    {
        if($this->startSession && !$this->session->isStarted()) {
            $this->session->start();
        }

        if ($this->session->isStarted()) {
            // We assume the sessionId contains data and has to be protected,
            // so we use a salted SHA1 checksum.
            return sha1($this->secret . $this->session->getId());
            // In the end this method will be called for _each_ log message.
            // If the session id would be constant and accessible through the whole request,
            // this would not be necessary.
        }

        return null;
    }
public function getSessionId ( ) { if ( $ this -> startSession && ! $ this -> session -> isStarted ( ) ) { $ this -> session -> start ( ) ; } if ( $ this -> session -> isStarted ( ) ) { // We assume the sessionId contains data and has to be protected, // so we use a salted SHA1 checksum. return sha1 ( $ this -> secret . $ this -> session -> getId ( ) ) ; // In the end this method will be called for _each_ log message. // If the session id would be constant and accessible through the whole request, // this would not be necessary. } return null ; }
Returns the session id.
If there is not session id yet, NULL has to be returned.

@return string|null
Returns the session id . If there is not session id yet NULL has to be returned .