Release Specific Upgrade Considerations

This document lists things you may wish to take into account as you upgrade. This includes:

• changes to the database schema or contents which deserve special notice
• changes to basic template operation

ALL Versions

• Part of staying up to date is monitoring not just your Zen Cart version, but all your other software dependencies, such as JavaScript. Use a tool like Google Chrome Lighthouse to find outdated JavaScript libraries with known vulnerabilities.

• Part of keeping modern is embracing newer PHP versions. You will need to address various common issues with PHP version incompatibility.

• Be sure external links are constructed with rel="noreferrer noopener".

Zen Cart 1.5.8 (currently in development phase, not released yet)

• The function zen_cfg_read_only has been added to the core. This means any plugin authors who use this function should remove it from the plugin (for 1.5.7+) or wrap it in if (!function_exists('zen_cfg_read_only')) (for older versions of Zen Cart).

• The misspelled notifier NOTIFIY_ORDER_CART_SUBTOTAL_CALCULATE has been deprecated and replaced by NOTIFY_ORDER_CART_SUBTOTAL_CALCULATE. (Because of the event aliasing feature, older code that references the misspelled notifier will continue to work, but you should still upgrade your plugins to use the correct one.)

Zen Cart 1.5.7

• The configuration constant UPLOAD_FILENAME_EXTENSIONS was removed from the database and replaced with an entry in includes/classes/upload.php. If you have modified this constant from its original setting of jpg,jpeg,gif,png,eps,cdr,ai,pdf,tif,tiff,bmp,zip you will want to make the same change in the aforementioned file.

• Internal changes necessitated removing the following inclusions from admin/includes/auto_loaders/currency_cron.core.php:

  • class.base.php
  • init_file_db_names.php
  • init_database.php

  If you have created additional cron jobs and used this file as a base, please apply the 1.5.7 changes to your custom files.

• The field products_description.products_viewed has been deprecated. It will be deleted in a future release. Product view tracking is now done using the table count_product_views.

• External links have been updated to use rel="noopener" or rel="noreferrer noopener". If you use external links (for social networking, manufacturer sites, product URLs, etc.) you should update your template to adopt this practice.

• A number of constants which were unused by the core were removed from language files. If you use a plugin which relied on these defines, you should expect a PHP Notice in your /logs folder. To resolve this, define the needed constants in a plugin specific file. Some of the defines removed are DATE_FORMAT_SHORT and DATE_TIME_FORMAT, which some plugins may have used even though core Zen Cart code does not.

Zen Cart 1.5.6

• The variable $downloads, returned from includes/modules/downloads, changed from a query result to an array. The following template files had to be updated to accommodate this change:

  • tpl_modules_downloads.php
  • tpl_account_history_info_default.php

  You will want to adjust any copies of these files in your template to process an array rather than a database query.

• The table containing the EZ-Pages data (ezpages) was split into two tables, ezpages and ezpages_content. This was done in order to add multi-language capabilities. Accordingly, any files (template overrides or custom files) which reference the ezpages table will need adjustment to account for this division.

• Date format updates began in this release - see date standardization.

Zen Cart 1.5.5

• The arguments for the notifier NOTIFY_ORDER_AFTER_SEND_ORDER_EMAIL were changed. This necessitated a code change in the observers watching for it.

• The responsive_classic template was introduced in this release. If you are coming from an older release with an older template, be sure to check and verify that your template performs properly on mobile devices. If not, you can use Responsive Classic or select another responsive template.

• Starting in this version, the email css was pulled out of the individual templates into a shared file called email/email_common.css. If you are creating or updating email templates, you should follow this new practice.

• The html_header.php file in template_default/common/ and responsive_classic/common/ folder contain header('X-Frame-Options:SAMEORIGIN'); to prevent clickjacking. If your template is older than 1.5.5, you will need to manually incorporate this change.

Zen Cart 1.5.2

• The list of pages created by includes/modules/pages/header_php.php changed from a query result to an array. So the template file includes/templates/YOURTEMPLATE/templates/tpl_page_default.php had to be updated to accommodate this change.

Zen Cart 1.5.0

• The admin menus are no longer built by files ending in .dhtml. Instead, a new database table called admin_pages was introduced. Mods which create their own menu entries must also follow this convention. Guidelines for upgrading plugins to 1.5 include instructions on this step.