WB 2.11.0

<?php

/**

 * doFilterReplaceSysvar

 * @param string to modify

 * @return string

 * Convert the {SYSVAR:xxxx} Placeholders into their real value

 */

   function doFilterSysvarMedia($sContent) {

      return doFilterReplaceSysvar($sContent);

    }

   function doFilterReplaceSysvar($sContent) {

        $aReg = array (

            'AppUrl' => WB_URL.'/',

            'MediaDir' => trim(MEDIA_DIRECTORY, '/').'/',

            'MEDIA_REL' => WB_URL.'/'.trim(MEDIA_DIRECTORY, '/')

        );

        $aSearches = array();

        $aReplacements = array();

        // search for all SYSVARs

        if (preg_match_all('/\{SYSVAR\:([^\}]+)\}/sU', $sContent, $aMatches)) {

            $aMatches = array_unique($aMatches[1], SORT_STRING);

            foreach ($aMatches as $sMatch) {

                $sTmp = '';

                $aTmp = preg_split('/\./', $sMatch);

                foreach ($aTmp as $sSysvar) {

                    if (!isset($aReg[$sSysvar])) {

                        $sTmp = '';

                        break;

                    }

                    $sTmp .= $aReg[$sSysvar];

                }

                if ($sTmp) {

                    $aSearches[] = '{SYSVAR:'.$sMatch.'}';

                    $aReplacements[] = $sTmp;

                }

            }

            $sContent = str_replace($aSearches, $aReplacements, $sContent);

        }

      return $sContent;

   }