AdminPageFramework_WPUtility_URL::getResolvedSRC PHP Method

    public static function getResolvedSRC($sSRC, $bReturnNullIfNotExist = false)
    {
        if (!self::isResourcePath($sSRC)) {
            return $bReturnNullIfNotExist ? null : $sSRC;
        }
        if (filter_var($sSRC, FILTER_VALIDATE_URL)) {
            return $sSRC;
        }
        if (file_exists(realpath($sSRC))) {
            return self::getSRCFromPath($sSRC);
        }
        if ($bReturnNullIfNotExist) {
            return null;
        }
        return $sSRC;
    }