public function postProcess()
 {
     global $currentIndex;
     if (Tools::isSubmit('submitCaching')) {
         if ($this->tabAccess['edit'] === '1') {
             $settings = file_get_contents(dirname(__FILE__) . '/../../config/settings.inc.php');
             if (!Tools::getValue('active')) {
                 $cache_active = 0;
             } else {
                 $cache_active = 1;
             }
             if (!($caching_system = Tools::getValue('caching_system'))) {
                 $this->_errors[] = Tools::displayError('Caching system is missing');
             } else {
                 $settings = preg_replace('/define\\(\'_PS_CACHING_SYSTEM_\', \'([a-z0-9=\\/+-_]+)\'\\);/Ui', 'define(\'_PS_CACHING_SYSTEM_\', \'' . $caching_system . '\');', $settings);
             }
             if ($cache_active and $caching_system == 'MCached' and !extension_loaded('memcache')) {
                 $this->_errors[] = Tools::displayError('To use Memcached, you must to install the Memcache PECL extension on your server.') . ' <a href="http://www.php.net/manual/en/memcache.installation.php">http://www.php.net/manual/en/memcache.installation.php</a>';
             } elseif ($cache_active and $caching_system == 'CacheFS' and !is_writable(_PS_CACHEFS_DIRECTORY_)) {
                 $this->_errors[] = Tools::displayError('To use CacheFS the directory') . ' ' . realpath(_PS_CACHEFS_DIRECTORY_) . ' ' . Tools::displayError('must be writable');
             }
             if ($caching_system == 'CacheFS') {
                 if (!($depth = Tools::getValue('ps_cache_fs_directory_depth'))) {
                     $this->_errors[] = Tools::displayError('Please set a directory depth');
                 }
                 if (!sizeof($this->_errors)) {
                     CacheFS::deleteCacheDirectory();
                     CacheFS::createCacheDirectories((int) $depth);
                     Configuration::updateValue('PS_CACHEFS_DIRECTORY_DEPTH', (int) $depth);
                 }
             }
             if (!sizeof($this->_errors)) {
                 $settings = preg_replace('/define\\(\'_PS_CACHE_ENABLED_\', \'([0-9])\'\\);/Ui', 'define(\'_PS_CACHE_ENABLED_\', \'' . (int) $cache_active . '\');', $settings);
                 if (file_put_contents(dirname(__FILE__) . '/../../config/settings.inc.php', $settings)) {
                     Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
                 } else {
                     $this->_errors[] = Tools::displayError('Cannot overwrite settings file.');
                 }
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to edit here.');
         }
     }
     if (Tools::isSubmit('submitAddServer')) {
         if ($this->tabAccess['add'] === '1') {
             if (!Tools::getValue('memcachedIp')) {
                 $this->_errors[] = Tools::displayError('Memcached IP is missing');
             }
             if (!Tools::getValue('memcachedPort')) {
                 $this->_errors[] = Tools::displayError('Memcached port is missing');
             }
             if (!Tools::getValue('memcachedWeight')) {
                 $this->_errors[] = Tools::displayError('Memcached weight is missing');
             }
             if (!sizeof($this->_errors)) {
                 if (MCached::addServer(pSQL(Tools::getValue('memcachedIp')), (int) Tools::getValue('memcachedPort'), (int) Tools::getValue('memcachedWeight'))) {
                     Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
                 } else {
                     $this->_errors[] = Tools::displayError('Cannot add Memcached server');
                 }
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to add here.');
         }
     }
     if (Tools::getValue('deleteMemcachedServer')) {
         if ($this->tabAccess['add'] === '1') {
             if (MCached::deleteServer((int) Tools::getValue('deleteMemcachedServer'))) {
                 Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
             } else {
                 $this->_errors[] = Tools::displayError('Error in deleting Memcached server');
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to delete here.');
         }
     }
     if (Tools::isSubmit('submitCiphering') and Configuration::get('PS_CIPHER_ALGORITHM') != (int) Tools::getValue('PS_CIPHER_ALGORITHM')) {
         if ($this->tabAccess['edit'] === '1') {
             $algo = (int) Tools::getValue('PS_CIPHER_ALGORITHM');
             $settings = file_get_contents(dirname(__FILE__) . '/../../config/settings.inc.php');
             if ($algo) {
                 if (!function_exists('mcrypt_encrypt')) {
                     $this->_errors[] = Tools::displayError('Mcrypt is not activated on this server.');
                 } else {
                     if (!strstr($settings, '_RIJNDAEL_KEY_')) {
                         $key_size = mcrypt_get_key_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
                         $key = Tools::passwdGen($key_size);
                         $settings = preg_replace('/define\\(\'_COOKIE_KEY_\', \'([a-z0-9=\\/+-_]+)\'\\);/i', 'define(\'_COOKIE_KEY_\', \'\\1\');' . "\n" . 'define(\'_RIJNDAEL_KEY_\', \'' . $key . '\');', $settings);
                     }
                     if (!strstr($settings, '_RIJNDAEL_IV_')) {
                         $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
                         $iv = base64_encode(mcrypt_create_iv($iv_size, MCRYPT_RAND));
                         $settings = preg_replace('/define\\(\'_COOKIE_IV_\', \'([a-z0-9=\\/+-_]+)\'\\);/i', 'define(\'_COOKIE_IV_\', \'\\1\');' . "\n" . 'define(\'_RIJNDAEL_IV_\', \'' . $iv . '\');', $settings);
                     }
                 }
             }
             if (!count($this->_errors)) {
                 if (file_put_contents(dirname(__FILE__) . '/../../config/settings.inc.php', $settings)) {
                     Configuration::updateValue('PS_CIPHER_ALGORITHM', $algo);
                     Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
                 } else {
                     $this->_errors[] = Tools::displayError('Cannot overwrite settings file.');
                 }
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to edit here.');
         }
     }
     if (Tools::isSubmit('submitCCC')) {
         if ($this->tabAccess['edit'] === '1') {
             if (!Configuration::updateValue('PS_CSS_THEME_CACHE', (int) Tools::getValue('PS_CSS_THEME_CACHE')) or !Configuration::updateValue('PS_JS_THEME_CACHE', (int) Tools::getValue('PS_JS_THEME_CACHE')) or !Configuration::updateValue('PS_HTML_THEME_COMPRESSION', (int) Tools::getValue('PS_HTML_THEME_COMPRESSION')) or !Configuration::updateValue('PS_JS_HTML_THEME_COMPRESSION', (int) Tools::getValue('PS_JS_HTML_THEME_COMPRESSION')) or !Configuration::updateValue('PS_HIGH_HTML_THEME_COMPRESSION', (int) Tools::getValue('PS_HIGH_HTML_THEME_COMPRESSION'))) {
                 $this->_errors[] = Tools::displayError('Unknown error.');
             } else {
                 Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to edit here.');
         }
     }
     if (Tools::isSubmit('submitMediaServers')) {
         if ($this->tabAccess['edit'] === '1') {
             if (Tools::getValue('_MEDIA_SERVER_1_') != NULL and !Validate::isFileName(Tools::getValue('_MEDIA_SERVER_1_'))) {
                 $this->_errors[] = Tools::displayError('Media server #1 is invalid');
             }
             if (Tools::getValue('_MEDIA_SERVER_2_') != NULL and !Validate::isFileName(Tools::getValue('_MEDIA_SERVER_2_'))) {
                 $this->_errors[] = Tools::displayError('Media server #2 is invalid');
             }
             if (Tools::getValue('_MEDIA_SERVER_3_') != NULL and !Validate::isFileName(Tools::getValue('_MEDIA_SERVER_3_'))) {
                 $this->_errors[] = Tools::displayError('Media server #3 is invalid');
             }
             if (!sizeof($this->_errors)) {
                 $baseUrls = array();
                 $baseUrls['_MEDIA_SERVER_1_'] = Tools::getValue('_MEDIA_SERVER_1_');
                 $baseUrls['_MEDIA_SERVER_2_'] = Tools::getValue('_MEDIA_SERVER_2_');
                 $baseUrls['_MEDIA_SERVER_3_'] = Tools::getValue('_MEDIA_SERVER_3_');
                 rewriteSettingsFile($baseUrls, NULL, NULL);
                 unset($this->_fieldsGeneral['_MEDIA_SERVER_1_']);
                 unset($this->_fieldsGeneral['_MEDIA_SERVER_2_']);
                 unset($this->_fieldsGeneral['_MEDIA_SERVER_3_']);
                 Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
             }
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to edit here.');
         }
     }
     if (Tools::isSubmit('submitSmartyConfig')) {
         if ($this->tabAccess['edit'] === '1') {
             Configuration::updateValue('PS_SMARTY_FORCE_COMPILE', Tools::getValue('smarty_force_compile', 0));
             Configuration::updateValue('PS_SMARTY_CACHE', Tools::getValue('smarty_cache', 0));
             Tools::redirectAdmin($currentIndex . '&token=' . Tools::getValue('token') . '&conf=4');
         } else {
             $this->_errors[] = Tools::displayError('You do not have permission to edit here.');
         }
     }
     return parent::postProcess();
 }