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  • Documentations for PrestaShop 1.5
  • English documentation 1.5
    • About PrestaShop 1.5
    • New features in PrestaShop 1.5
    • Getting Started
      • What you need to get started
      • Installing PrestaShop
      • Installing PrestaShop using the command line
      • Updating & Uninstalling
      • Misc. information
    • Updating PrestaShop
      • Automatic update
      • Manual update
      • Making and restoring your own backup
      • In case of issues
    • User Guide
      • Training
      • Customizing your shop
      • Browsing the front-office
      • Connecting to the PrestaShop back-office
      • First steps with PrestaShop 1.5
      • Adding Products and Product Categories
      • A Look Inside the Catalog
      • Managing Orders
      • Managing Customers
      • Creating Price Rules and Vouchers
      • Managing Shipping
      • Understanding Local Settings
      • Managing Modules and Themes
      • Making the Native Modules Work
      • Understanding the Preferences
      • Understanding the Advanced Parameters
      • Administering the Back-Office
      • Understanding Statistics
      • Advanced Stock Management
      • Managing Multiple Shops
    • Developer Guide
      • Developer tutorials
        • Using the PrestaShop Web Service
          • Webservice one-page documentation
          • Chapter 1 - Creating Access to Back Office
          • Chapter 2 - Discovery - Testing access to the web service with the browser
          • Chapter 3 - First steps - Access the Web service and list client
          • Chapter 4 - Retrieve Data - Retrieving a Client
          • Chapter 5 - Modification - Update client
          • Chapter 6 - Creation - Remote Online Form
          • Chapter 7 - Removal - Remove customer accounts from the database
          • Chapter 8 - Advanced Use
          • Chapter 9 - Image management
          • Chapter 10 - Price management
          • Cheat-sheet - Concepts outlined in this tutorial
          • Web service reference
        • Helpers
          • HelperForm
          • HelperOptions
          • HelperList
          • Using helpers to overload a back-office template
        • New Developers Features In PrestaShop 1.5
        • Using the Context Object
        • DB class best practices
        • Public and overloadable methods
        • Overriding default behaviors
        • Using addJquery(), addJqueryPlugin() and addJqueryUI()
        • Handling special characters in links
        • Auto-updating modules
        • Front-Office Controllers
        • Controllers correspondence table
        • Specifics of multistore module development
        • Developer tips and tricks
        • PrestaShop's developer tools
        • Using the backward compatibility toolkit
      • Fundamentals
      • Coding Standards
      • Setting up your local development environment
      • Diving into PrestaShop Core development
      • Creating a PrestaShop module
      • Creating a front-office module
      • Creating a module with both front-end and back-end controllers
      • Hooks in PrestaShop 1.5
      • Translations in PrestaShop 1.5
      • How to use the Forge to contribute to PrestaShop
      • How to write a commit message
      • Contributing code to PrestaShop
    • Designer Guide
      • Theme development fundamentals
      • Integrating content in a page using hooks
      • Characteristics of a front-office theme
      • Characteristics of a back-office theme
      • Creating your own theme
      • Theme templates and Smarty
      • Using jQuery and Ajax
      • Best practices
      • Designer tutorials
        • Changes in version 1.5 which impact theme development
        • Changing a 1.4 theme to support gift products
        • Implementing layered navigation in a theme
    • System Administrator Guide
    • Merchant's Guide
      • Our advices
      • Sample price rules
    • FAQ
      • Using PrestaShop with WordPress
    • Troubleshooting
  • Documentation française 1.5
    • À propos de PrestaShop 1.5
    • Nouveautés de PrestaShop 1.5
    • Guide de démarrage
      • Ce dont vous avez besoin
      • Installer PrestaShop
      • Installer PrestaShop en ligne de commande
      • Mettre PrestaShop à jour
      • Informations diverses
    • Guide de mise à jour
      • Mise à jour automatique
      • Mise à jour manuelle
      • Faire une sauvegarde et la restaurer
      • En cas de problème
    • Guide de l'utilisateur
      • Formations
      • Personnaliser votre boutique
      • Parcourir le front-office
      • Se connecter au back-office de Prestashop
      • Premiers pas avec PrestaShop 1.5
      • Ajouter des produits et des catégories de produits
      • Un aperçu du catalogue
      • Gérer les commandes
      • Gérer les clients
      • Mettre en place des promotions
      • Gérer les transporteurs
      • Comprendre les réglages locaux
      • Gérer les modules et les thèmes
      • Configurer les modules natifs
      • Comprendre les préférences
      • Comprendre les paramètres avancés
      • Administrer le back-office
      • Comprendre les statistiques
      • Gestion avancée des stocks
      • Gérer plusieurs boutiques
    • Guide du développeur
      • Fondamentaux
      • Norme de développement
      • Mettre en place votre environnement de développement
      • Plonger dans le développement PrestaShop
      • Créer un module PrestaShop
      • Les hooks de PrestaShop 1.5
      • Les traductions dans PrestaShop 1.5
      • Comment utiliser la Forge pour contribuer à PrestaShop
      • Comment écrire un descriptif de modification
    • Guide de l'intégrateur
      • Fondamentaux de la création de thème
      • Intégrer du contenu dans une page à l'aide de hooks
      • Caractéristiques d'un thème front-office
      • Caractéristiques d'un thème back-office
      • Template de thème et Smarty
      • Utiliser jQuery et Ajax
      • Bonnes pratiques
    • Guide de l'administrateur système
    • Guide du vendeur
      • Exemples de promotions
      • Nos bons conseils
    • Questions fréquentes
    • Dépannage
  • Documentación española 1.5
    • Acerca de PrestaShop 1.5
    • Introducción
      • Lo que necesita para empezar
    • Guía del usuario
      • Formación
      • Personalización de su tienda
      • Exploración del front-office
      • Conexión al back-office de PrestaShop
      • Primeros pasos con PrestaShop 1.5
      • Añadir productos y categorías de productos
      • Una mirada interna al catálogo
      • Gestionar pedidos
      • Gestionar clientes
      • Crear reglas de precios y cupones
      • Gestionar el transporte
      • Comprender la Configuración Local
      • Gestionar módulos y temas
      • Configurar los Módulos Nativos
      • Comprender las Preferencias
      • Comprender los Parámetros avanzados
      • Administrar el Back-Office
      • Comprender las estadísticas
      • Gestión avanzada de stock
      • Gestionar varias tiendas
    • Guía del Desarrollador
      • Tutoriales para Desarrolladores
        • Uso del Web Service de Prestashop
          • Capítulo 1 - Creación de acceso al Back Office
  • Документация на русском языке 1.5
    • Информация о PrestaShop 1.5
    • Новые функции в PrestaShop 1.5
    • Приступая к работе
      • Что нужно чтобы приступить к работе
      • Установка PrestaShop
      • Установка PrestaShop при помощи командной строки
      • Обновление и удаление PrestaShop
      • Прочая информация
    • Руководство пользователя
      • Обучение
      • Настройка вашего магазина
      • Изучение публичной части сайта
      • Бэк-офис PrestaShop
      • Первые шаги в PrestaShop 1.5
      • Добавление товаров и товарных категорий
      • Внутри каталога
      • Управление заказами
      • Работа с клиентами
      • Создание правил ценообразования корзины и ваучеров
      • Управление доставкой
      • Ориентация в локальных настройках
      • Управление модулями и темами
      • Настойка встроенных модулей
      • Ориентация в настройках
      • Ориентация в расширенных параметрах
      • Администрирование Back-Office
      • Ориентация в статистике
      • Расширенное управление запасами
      • Управление мультимагазином
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  • Developer mode
  • p() and d()
  • Profiler

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  1. English documentation 1.5
  2. Developer Guide
  3. Developer tutorials

PrestaShop's developer tools

PrestaShop tries its best to make it easy for developers to build clean and working themes, modules and overriding classes. This is done through a set of developer tools that you can enable whenever you needs them.

By default, PrestaShop turns error reporting off, which makes that if your code fails, you will see a blank page with no information. This is because customers should not see anything from your server. You can get a lot of information using the following tools.

Most of these tools should only be enabled when you are in the development process, on your local installation. If you have to enable them on a production store, you should first disable the store so that only you can see the results of your tests.

Developer mode

PrestaShop's developer mode enables a series of tools to help developers:

  • Sets PHP's display_errors to "on": errors are displayed in the browser instead of just blank pages.

  • Sets PrestaShop's _PS_DEBUG_SQL_ constant to "true": PrestaShop displays potential problems within your SQL queries.

  • Sets PrestaShop's _PS_DISPLAY_COMPATIBILITY_WARNING_ constant to "true": PrestaShop displays a warning message if a piece of code you are using is deprecated in the current version.

All in all, this mode displays a lot more error messages than the regular mode.

Enabling it is quite easy:

  • On your server, open the /config/defines.inc.php file.

  • Find this line: define('_PS_MODE_DEV_', false);

  • In this line, change "false" to "true".

  • Save your changes.

Now reload any blank or suspicious page: you should get a lot more information.

p() and d()

PHP developers are used to regularly call print_r($var) in order to know what lies inside $var. In order to properly display the content of $var, they often encapsulates print_r() within HTML or XML tags.

PrestaShop does that for you! p() and d() are both wrappers around print_r(). p() returns the content of the variable, while d() finishes with die('END').

On top of that, PrestaShop defines the ppp() and ddd() method, which are respectively the aliases of p() and d(). They work exactly the same, but are often easier to search and find in a huge block of code.

These debug methods are not available by default. To activate them, you must enable the Developer mode (see above).

Profiler

PrestaShop's profiler is a great way to discover the bottlenecks in your code: once enabled, each page on either the front-end or the back-end of your store will display a lot of information about the page and its files:

  • Load time.

  • Processed hooks.

  • Memory usage.

  • Number of database queries and their overall duration.

  • Database stopwatches per query.

  • Duplicate queries.

  • Database table stress.

  • ObjectModel instances.

  • Included files.

This is a huge step in knowing which files or SQL query you should work on when you need to improve the performance of your store.

Enabling it is quite easy:

  • On your server, open the /config/defines.inc.php file.

  • Find this line: define('_PS_DEBUG_PROFILING_', false);

  • In this line, change "false" to "true".

  • Save your changes.

Now load any page of your store, either front-end or back-end, and it will display a lot of statistics at the bottom of the page, below the regular content of that page.

In order to disable the Profiling Mode, simply open the defines.inc.php file and change the value back to "false" in the line mentioned above.

Here is the result from the home page:

Here is the result from the back-office:

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