eventespresso / event-espresso-core

            if ($session_data) {

                $session_data = preg_replace_callback(

                    '!s:(d+):"(.*?)";!',

                    function ($match)

                    {

                        return $match[1] === strlen($match[2])

                            ? $match[0]

                            : 's:' . strlen($match[2]) . ':"' . $match[2] . '";';

                    },

                    $session_data

                );

        $error = '<pre>';

        $data2 = preg_replace_callback(

            '!s:(\d+):"(.*?)";!',

            function ($match)

            {

                return ($match[1] === strlen($match[2]))

                    ? $match[0]

                    : 's:'

                      . strlen($match[2])

                      . ':"'

                      . $match[2]

                      . '";';

            },

            $data1

        );