How can I run two Skype accounts ?

In the Run window, enter the following command (include the quotes) and press OK:

"C:\Program Files\Skype\Phone\Skype.exe" /secondary

On Ubuntu Run this command on terminal:

skype --secondary

Remove .php, .html, .htm extensions with .htaccess

 htaccess rewriting all .php files to .html

RewriteEngine on 
RewriteRule ^(.*)\.html $1\.php 

Symfony Basic File Structure

The Basic File Structure

The path variables are defined in the sfProjectConfiguration and sfApplicationConfigurationclasses and stored in the sfConfig object.  

sf_root_dir           # myproject/
sf_apps_dir           #   apps/
sf_app_dir            #     frontend/
sf_app_config_dir     #       config/
sf_app_i18n_dir       #       i18n/
sf_app_lib_dir        #       lib/
sf_app_module_dir     #       modules/
sf_app_template_dir   #       templates/
sf_cache_dir          #   cache/
sf_app_base_cache_dir #     frontend/
sf_app_cache_dir      #       prod/
sf_template_cache_dir #         templates/
sf_i18n_cache_dir     #         i18n/
sf_config_cache_dir   #         config/
sf_test_cache_dir     #         test/
sf_module_cache_dir   #         modules/
sf_config_dir         #   config/
sf_data_dir           #   data/
sf_lib_dir            #   lib/
sf_log_dir            #   log/
sf_test_dir           #   test/
sf_plugins_dir        #   plugins/
sf_web_dir            #   web/
sf_upload_dir         #     uploads/

Every path to a key directory is determined by a parameter ending with _dir. Always use the path variables instead of real (relative or absolute) file paths, so that you will be able to change them later, if necessary. For instance, when you want to move a file to the uploads/ directory in an application, you should use sfConfig::get('sf_upload_dir') for the path instead of

prestashop remove reviews from product page

prestashop remove reviews or product comments  from product page

Login to admin panel -> under module -> Product Comments-> Disable this module.

Prestashop Change Base Url

Change Prestashop Base Url

Edit the /config/settings.inc.php file and change
define('__PS_BASE_URI__', '/sub_folder_name/');
to
define('__PS_BASE_URI__', '/');
Log in to your BO and go to Preferences>SEO & URL's to adjust your shop accordinly.

Prestashop – Global Variables

{$cms->id} = CMS Page's ID 
{$cms->position} = CMS Page's position 

Meta Variables

{$meta_keywords|escape:'htmlall':'UTF-8'} = meta keywords 
{$meta_description|escape:'htmlall':'UTF-8'} = meta description 
{$meta_title|escape:'htmlall':'UTF-8'} {$category->name|escape:'htmlall':'UTF-8'} = Category Name 
{$shop_name|escape:'htmlall':'UTF-8'} = Name of Shop code for page (doesn't work) 
{$cms_title.category_link} = ? {$cms_title.name} = Name of the CMS Category? 
{$cms_title.category_name} {$cms_page.link} = link to a CMS page 
{$cms_page.name|escape:html:'UTF-8'} = CMS page name

Prices

{if isset($product.reduction) && $product.reduction && isset($product.show_price) && $product.show_price && !$PS_CATALOG_MODE}<p class="presale_container">{convertPrice price=$product.price_without_reduction}</p>{/if}

http://www.prestashop.com/forums/topic/97933-display-original-price-on-sale-item-product-listtpl/

Images

{$logo_image_width}
{$logo_image_height}

Links and Directories

{$link->getPageLink('search.php')} = Page Link to specific page 
{$img_dir} = images directory in the theme 
{$img_ps_dir} = full directory from http://www to image directory 
{$base_dir} = base directory of site $tpl_dir./breadcrumb.tpl = name of template directory and name of template http://{$smarty.server.HTTP_HOST}
{$smarty.server.REQUEST_URI} = current url of page 
{$img_update_time} = image update time 
{$css_dir} = theme's css directory 
{$content_dir} = ? {$base_dir_ssl} 
 href="{$this_path_ssl}validation.php" title="{l s='Pay on your account. 30 Day Net Terms' mod='cashondelivery'}">  - use {$this_path_ssl} and mod='cashondelivery' to have Prestashop use the path to the module

Other Variables

{$product->id_category_default|escape:'htmlall':'UTF-8'} Default Category ID
01 $base_dir { root folder of your shop } 
02 $base_dir_ssl { root folder of your shop using HTTPS protocol } 
03 $content_dir { root folder of your shop depending on the SSL settings } 
04 $img_ps_dir { root folder containing images "/img/" } 
05 $img_dir { images folder in your current theme directory } 
06 $css_dir { css folder inside the current theme folder } 
07 $js_dir { JavaScript inside the theme folder } 
08 $tpl_dir { theme root folder } 
09 $modules_dir { modules root folder } 
10 $mail_dir { mail templates root folder } 
11 $lang_iso { current language ISO code } 
12 $come_from { previous page address [absolute] } 
13 $shop_name { your specified shop name } 
14 $cart_qties { total number of products in the cart } 
15 $cart { shopping cart contents } 
16 $currencies { pulls available currencies } 
17 $id_currency_cookie { selected currency id [cookie dependent] } 
18 $currency { active currency } 
19 $cookie { active cookie } 
20 $languages { grabs available languages } 
21 $logged { checks whether users is logged in } 
22 $page_name { current pages name } 
23 $customerName { customer name [session dependent] } 
24 $priceDisplay { current price display settings

Global smarty variables in Prestashop

VARIABLE	DESCRIPTION
LINKS
{$come_from}	URL for the visitor's origin.
{$link->getPageLink('prices-drop')}	Specific page – Sales
{$link->getPageLink('contact', true)}	Contact form (true is for SSL support)
{$cart}	shopping cart contents
{$cart_qties}	Number of products in the cart.
{$cookie}	User cookie.
{$currencies}	The various available currencies.
{$currency}	Currency object (currently used currency).
{$customerName}	Client name (if logged in).
{$id_currency_cookie}	ID of the current currency.
{$languages}	The various available languages.
{$logged}	Indicates whether the visitor is logged to a customer account.
{$page_name}	Page name.
{$priceDisplay}	Price display method (with or without taxes…).
{$roundMode}	Rounding method in use.
{$shop_name}	Shop name.
{$use_taxes}	Indicates whether taxes are enabled or not.
Directories
{$base_dir}	root folder of your shop
{$base_dir_ssl}	root folder of your shop using HTTPS protocol
{$content_dir}	root folder of your shop depending on the SSL settings
{$css_dir}	URL for the theme's CSS folder.
{$img_col_dir}
{$img_store_dir}	URL for the stores images folder.
{$img_cat_dir}	URL for the categories images folder.
{$img_dir}	URL for the theme's images folder.
{$img_lang_dir}	URL for the languages images folder.
{$img_manu_dir}	URL for the manufacturers images folder.
{$img_prod_dir}	URL for the products images folder.
{$img_ps_dir}	URL for the PrestaShop image folder.
{$img_ship_dir}	URL for the carriers (shipping) images folder.
{$img_sup_dir}	URL for the suppliers images folder.
{$js_dir}	URL for the theme's JavaScript folder.
{$lang_iso}	ISO code for the current language.
{$modules_dir}	URL the modules folder.
{$mail_dir}	URL for the mail templates folder.
{$pic_dir}	URL for the pictures upload folder.
{tpl_dir}	URL for the current theme's folder.