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$this->need_instance = 0;

NeedThe need_instance flag indicates whether to load the module's class when displaying the "Modules" page in the back-office. If set at 0, the module will not be loaded, and therefore will spend less resources to generate the page module. If your modules needs to display a warning message in the "Modules" page, then you must set this attribute to 1.

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Calling the parent's constructor. This must be done before any use of the $this->l() method, and after the creation of $this->name.

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For instance, in our mymodule_page.php, we can create such a a variable:

<?php
global $smarty;

include( '../../config/config.inc.php' );
include( '../../header.php' );

$mymodule = new MyModule();
$message = $mymodule->l( 'Welcome to my shop!' );
$smarty->assign( 'messageSmarty', $message ); // creation of our variable
$smarty->display( dirname(__FILE__) . '/mymodule_page.tpl' );

include( '../../footer.php' );
?>

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All Smarty variables are global. You should therefore pay attention not to name your own variable with the name of an existing Smarty variable, in order to avoid overwriting it. It is good practice to avoid overly simple names, such as products, and to prefix it with your module's name, or even your own name, such as: {$mark_mymodule_product}.

Here is a list of Smarty variables that are common to all pages:

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Some forums keep certain threads pinned on top of all threads; they contain some useful information, so be sure to read them through.

Our bug-tracker

if If it turns out your issue stems from a PrestaShop bug rather than your code, please do submit the issue in the PrestaShop bug-tracker: http://forge.prestashop.com/ (you will need to register). This enables you to discuss the issue directly with the PrestaShop developers.

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