Zen Cart Storeowner Documentation - All FAQs

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0 DB_ERROR_NOT_CONNECTED What do I do with this message?
About Order Total Modules Fees and Discounts you can add to an order
About Payment Modules What payment processing options are available?
About Plugins Modifying your shopping cart using plugins
About Shipping Modules How can I ship orders?
About this site and the Zen Cart Project Bug reports, security issues, contributing and community.
About Us Page Tell the story of your business
Abuse and Spam Handling Spam signups and other bad traffic
Accessibility Checker from Siteimprove Using the Chrome extension Siteimprove Accessibility Checker
Accessibility Overview WCAG and Section 508
Accessibility page The accessibility policy for your store
Accessibility Plugins Add Ons that help your store's accessibility
Accessibility Widgets Are Accessibility Widgets a Magic Wand?
Add image to sidebox or centerbox Using a sidebox or centerbox to show product images
Add to Cart Controlling add to cart operation in your store
Adding a Link to the Information sidebox Adding your own links
Adding a message to the admin order update email Modifying emails which are sent when orders are updated
Adding a message to the checkout email How do I add a message to my order confirmation emails?
Adding a tracking pixel Integrating with systems that use tracking pixels
Adding an order status What if I want a new order status?
Adding Google Analytics or Google Tag Manager How do I install JavaScript snippets for 3rd-party tools?
Adding Pages to my site Creating a new page for your store
Additional Software Adding WordPress, Joomla, Drupal, or other software to your server
Address formats - what are they? How addresses are displayed in different countries
Admin Activity Logs warning message What should I do about logs over two months old?
Admin customization Changing the look of your back end
Admin is slow or hangs forever Dealing with performance issues in Admin
Admin menu item is missing I can't find an item in my Admin menu
Admin Password - Resetting or Changing Reset your admin password using these steps
Admin password expired Why do I have to change it?
Admin search How you can search for products in the admin panel
Admin Site Specific Overrides How to customize your admin behavior without modifying core files
Advanced Email Troubleshooting Next steps for deliverability, including SFP, DKIM and DMARC
All Products Listing all products in your store
Alt Text What role does Alt Text play in accessibility?
ANDI from SSA Testing Accessibility Compliance with ANDI
Announcements Hear about new releases and security updates
ARIA Labels What is an ARIA Label
Ask A Question page The product question page
Attribute Pricing How to use Zen Cart Attributes to set product pricing
Attributes - adding to products Creating product variants using attributes
Attributes - an introduction Introduction to Zen Cart Attributes
Attributes - How do I make dropdowns start with "Please Select" Prompting the customer to select an option value
Audiences What is an audience in Zen Cart?
Authorize.net AIM Payment Module Zen Cart Authorize.net AIM Payment Module
Authorize.net CIM Payment Module Zen Cart Authorize.net CIM Payment Module (for card on file)
Authorize.net SIM Payment Module Zen Cart Authorize.net SIM Payment Module (DEPRECATED)
Backups - how do I do a site backup? how do I do a site backup in Zen Cart?
Balance Owed Payments Taking payment for balances owed
Basic 158+ Language Customizations Starting from scratch for 1.5.8 with language files
Basic Email Troubleshooting Emails are not being received - deliverability issues
Basic Template Customizations What are the most common template changes people do first?
Basics - Components of Zen Cart How the pieces fit together
Basics - cPanel The cPanel control panel
Basics - Default files, template default and overrides What is a default file vs a template file?
Basics - Deployment Configurations Ways to install Zen Cart
Basics - Hosting and Domain concepts Domains, Name Servers, Hosting and more
Basics - Security Operating Zen Cart in a secure manner
Basics - Store Setup Checklist Things to do when setting up a store
Basics - Terms and Definitions Terms used throughout this site
Basics - URLs URL structure used by Zen Cart
Basics - Useful Tools Useful Tools for working with Zen Cart
Before you Post - how to ask a good question Zen Cart Forum Posting Effective Questions
Blank Page troubleshooting How do I fix a blank page or partial blank page?
Blocking Attacks How do I keep these bots away from my site?
Blocking posts from specific users The Zen Cart forum ignore list
Blocking probing activity Stopping robots and other pests
Blogging How can I build a community? Does blogging make sense?
Boilerplate Using repeating blocks of text in your Zen Cart
Bootstrap Template for Zen Cart What is the Bootstrap Template?
Brands Page A page facilitating search by manufacturer.
Broken Padlock Why does my site show as insecure?
Build your own sidebox If the sidebox you want isn't available, create it yourself
Built In Reports Reports that come with a base install of Zen Cart
Buttons How to customize buttons
Caching Why doesn't my new image show?
Can a product be listed in more than one category? Showing a product in multiple places
Can I print a high resolution logo on my invoices and packing slips? Branding your invoices and packing slips
Can I use an image for a sidebox header Sidebox headers don't have to be text
Can Zen Cart do this? Miscellaneous FAQs about Zen Cart
Can't login or stay logged in or add-to-cart PHP Session Handling in Zen Cart
Card Number Validation How are credit cards validated?
Categories and Products - Adding them to your store Populating your store
Categories sidebox Making changes to the Categories sidebox
Category Listing Page The category listing page
Category Management in Admin Adding, Editing, Copying, Moving and Deleting Categories
Category product-type restrictions Ensuring only one product type can be created in a category
Centerboxes What are Zen Cart centerboxes?
Changing the Email Subject Line Changing the Zen Cart Email Subject Line
Changing your site's appearance Changing the look of your shopping cart
Character Sets Representing characters outside US ASCII
Checking available PHP Versions Seeing which PHP versions are available
Checkout how do I allow customers to check out?
Checkout Shipping - Checkout Payment - Checkout Confirmation - Checkout Success pages The customer checkout flow
Cloudflare Using Cloudflare with Zen Cart
Code of Conduct Zen Cart Forum Code of Conduct
Colon Separated Pair configuration Specifying configuration values using colon-separated pairs in Zen Cart
Color Contrast What role does Color Contrast play in accessibility?
Columnar Layout for Category Listing pages Presenting categories in a Grid
Columnar Layout for Product Listing pages Presenting products in a Grid
Commercial Help Wanted Zen Cart Commercial Help Wanted
Communication Issues with UPS, PayPal, etc. Using the utilities in the extras folder to diagnose communication issues
Conditions page The terms and conditions for your store
Configuration Parameter Name Changes Changes to the names of configuration parameters
configure.php explained Understanding the main Zen Cart configuration file
Constant already defined debug logs How to suppress logs saying a constant is already defined
Contact Us page The email form page
Contrast Ratio Tool from Siege Media How can I really test color contrast?
Contributing to the Zen Cart project Ways you can get involved in Zen Cart
Contributing your plugin Sharing your work with other users
Converting from iso-8859-1 to utf8 or utf8mb4 Modern sites should use UTF8 or UTF8MB4
Core Team Zen Cart Core Team
Correcting Misspelled Email Addresses Correcting typos in email addresses
Could not upgrade to version X Troubleshooting a failed database upgrade
Coupons Price reductions and free shipping for customers with a code
Creating Links to Other Pages How to create intra-site links
Creating the template_info.php file Why doesn't my template show up in Tools > Template Selection?
Creating your own Template The steps required to build a Zen Cart template
Creating Zone Definitions Recipes for common zone such as lower 48 states
Credit Card Authorize vs Capture How do I authorize a Credit Card but not actually charge it until I ship the goods?
CSS Stylesheet customization in Zen Cart
Customer Approval Limiting access to your store
Customer Referral Processing Rewarding customers who spread the word
Customizing Email Changing the appearance of email sent by Zen Cart
Database-Only Upgrade Instructions Lower cost quickie upgrading
Databases Where is the data stored in Zen Cart?
Date format - changing it from the US format to dd/mm/yyyy (1.5.7-) Localizing data display in 1.5.7 and below
Date format - changing it from the US format to dd/mm/yyyy (1.5.8+) Localizing data display
Date standardization Getting custom date fields set correctly
Debug Logs How do I interpret a debug log?
Default line items on an order From subtotal to total
Define Pages Customizing your store with define pages
Deleted product redirects Using .htaccess redirects for deleted products
Demo Data Example product and configuration data for new users
DevTools from Axe - Free Version How can I use Axe DevTools to test accessibility?
Diagnosing Obscure Issues Strategy for digging into root causes of problems
Discounts Discounts you can add to customer orders
Display the search box in the header only How to put the search box at the top of the page
Displaying sideboxes for logged in visitors only Customizing sidebox display based on customer status
Documentation How to use this site
Donate Donate to Zen Cart
Down for Maintenance Turning your Zen Cart store off for a time
Download delivery methods How are downloads made available after checkout?
Download folder - Relocating Storing downloads outside of webroot
Downloadable Products - can they also be shippable? Configuring Zen Cart Combo Products
Downloadable products - how to create? Digital downloads - software, music and books
Downloadable products - verifying correctness Check your downloads after creating them
Downloading Zen Cart Where can I download the Zen Cart code?
Downloads - why do they not activate after checkout? If downloads are not visible to your customers, check here
Downloads which are not products Posting PDFs and other free downloads on your site
EasyPopulate Creating products from a CSV
Edit Orders Modifying an order after it has been placed
Email Archive Manager Keeping a record of email sent by Zen Cart
Email Transport Methods SMTPAuth and other ways to send email
Email Troubleshooting What do to when email is not being sent and/or received
ERP Tools Enterprise Resource Management and Zen Cart
ERROR 0071 - There appears to be a problem with the database What do to when it says "Maintenance is required."
Error 2006 MySQL server has gone away or 2013 Lost connection to MySQL server during query What do I do with this message?
Errorlog access Where do I find my server's errorlog to review server-side problems?
Exporting customer email addresses Creating a CSV of customer email addresses
Extra Pages The built-in extra pages
EZ-Page Not Found When I go to my EZ-Page, it says the page you were attempting to access cannot be found
EZ-Pages sidebox Customizing the Important Links sidebox
Fabricating Email Addresses Creating email addresses for customers who don't have them
Fake solicitations for Zen Cart PCI compliance and Crypto scams
Favicon How do I set my own favicon?
Featured Products Highlighting specific products in your store
Features of Zen Cart What capabilities are built in to this ecommerce solution?
FedEx Setup Shipping via Federal Express (FedEx)
Fees Fees you can add to customer orders
File upload limitations Dealing with post_max_size and max_file_uploads
Finding a Plugin Where can I find plugin X?
Fixing a Mis-typed Email Address My customer has a typo in their email address and now can't login
Fixing broken tables Common MySQL table issues
Fixing Physical Addresses Fixing Customer Shipping and Billing Addresses in Zen Cart
Font Awesome The use of the fontawesome.io in your template
Forum Do's and Don'ts Zen Cart Forum Etiquette
FPM What is FPM?
Free Shipping Handling delivery when shipping is not required
Galleries How do I create an image gallery
Gift Certificates Store vouchers
Glossary Terms you will see in Zen Cart documentation
Gmail How do I use Gmail for email?
Google Chrome Inspect Using Chrome's tools to keep your site healthy
Group Pricing Discounts for select customers
GZIP compression Compressing pages during delivery
Home Page Configuring your site's main page
How can I add Meta Tags to my EZ-Pages? I want a custom meta title and meta description setting
How can I create a link to an EZ-Page? Using the zen_ez_pages_link function
How can I disable "search in description" in the search sidebox? Narrowing search fields to exclude products_description
How can I force my site to add "www." to the URL? URL rewrite to add www subdomain for Zen Cart
How can I limit the age of my customers to people over 18? Selling age-restricted products
How can I restrict my employees' admin capabilities? Disallowing admin functions for some staff members
How can I tell if my products have attributes? Categories/Products attributes indicator
How do I add links to the Header and Footer? Putting important links on every page
How do I add or delete categories? Organizing products in categories
How do I add or delete products? Managing products in your store
How do I build HTML-formatted Email for other languages? Multilanguage HTML email
How do I change the "Congratulations! you have successfully installed..." Message? Removing the installation confirmation
How do I change the "Sales Message Goes Here" or "Tagline Here" text? Removing these default text placeholders
How do I change the "Welcome Guest" message? Removing or changing the message for non-logged-in users
How do I change the "Welcome to Zen Cart!" image? Removing or changing the picture from the home page
How do I change the a sidebox title? Where are the strings for sidebox titles?
How do I change the header background image My template uses a background image and I don't want it
How do I change the logo or the logo alt text in the header? (1.5.7-) Customizing your logo in 1.5.7 and below
How do I change the logo or the logo alt text in the header? (1.5.8+) Customizing your logo in 1.5.8 and above
How do I change the title of main_page=page_X? Changing the name of PAGE_2, PAGE_3 or PAGE_4
How do I create a MySQL database? Using cPanel to create a MySQL database
How do I determine which files to edit? Where do I make the change?
How do I disable plugin version checking? I don't want to see the message "A NEW VERSION OF THIS PLUGIN IS AVAILABLE"
How do I email all my customers about a sale or promotion? Sending bulk email
How do I enable "Customers Also Purchased" display? Showing what other customers purchased
How do I enable SSL after I have installed Zen Cart? Making your cart use SSL
How do I find the posts I (or another member) have made? Where was that question I asked ...
How do I find the value of a configuration setting? Where are the all-uppercase strings set?
How do I get paid? Understanding payment collection for your orders
How do I increase the number of products per page in admin? Categories/Products rows per page
How do I Install Zen Cart? Should I use Softaculous or Installatron?
How do I prevent my email from being treated like spam? Customers can't see my email because it goes to SPAM
How do I remove and/or re-arrange the sideboxes? Sidebox display and sort order
How do I remove the logo completely? I don't want a logo for my site
How do I remove the word "Home" in the middle column? Removing the home breadcrumb
How do I set up "Music" products for audio-previews? Playing clips from your music products
How do I set up a default tax class for new products? Save time by pre-setting a tax class for product creation
How do I set up banners? and report on banner ads? Banner management in admin
How do I set up meta tags for my site? Meta Tags: title, description and keywords
How do I show my documents in their own sidebox? For users of Document General product type
How do I sort products in the admin Categories/Products sort order
How do I speed up my site? Basic performance improvement tips
How do I turn off the display of the weight? Weights don't apply, or I don't want to show product weights
How do I turn off the listing of categories that goes across the top of my page? Disabling category header menu (aka "categories tabs")
How do I use another currency instead of US Dollars? Alternate currencies in Zen Cart
How do I validate the integrity of a downloaded file? Checking SHA1 or MD5 checksums
How to install a plugin Adding a plugin to your store
How to rearrange the product info page Changing the product info page layout
How to show/hide text? Using a disclosure widget
How to uninstall a plugin Backing out a plugin
How Zen Cart uses cookies Cookies and Session data
HTML Email Templates How HTML mail is formatted in Zen Cart
HTTP response codes What do 500, 404, 200 mean?
I can't login to the Admin after installing Zen Cart Post installation login issues
I don't have the file YOURTEMPLATE/some-name What if a template file is missing?
I want to enable/disable some sideboxes Conditional sidebox display
I've got TEXT_MAIN being displayed on my page Unexpected uppercase words showing in page content or error logs
Image Configuration Settings that determine how images appear on your site
Image Filename conventions How are products and images associated?
Image Plugins Helpful plugins for image management
Image Preparation - how to Preparing and Optimizing Images for Zen Cart
In Memoriam Notable Zen Cart Contributors who have passed away
Incorrectly defined tables Updating older table definitions
Index Listing Configuration Configuring product listing pages and associated centerboxes
Individual Per Item shipping charges How can I set up individual shipping charges per item?
Information sidebox Making changes to the Information sidebox
Installer does not show an Upgrade button I only see the Clean Install button
Integrating Sales Analytics/Affiliate Tools JROX JAM, SNAP, iDevAffiliate and other sales tracking systems
Integrating with Google Analytics How do I get analytics data for my store?
Introduction to Email in Zen Cart Overview of the email system
Is it possible to order fractional quantities? What to do if your product is not sold in whole units
Is there a way that I can check on what users with Admin access to my site are doing? Monitoring admin users
JavaScript Customization Adding or changing JavaScript
JavaScript Libraries Keeping your JavaScript libraries current
Known Bugs Known Bugs in Zen Cart
Language Files - Shortcut Simplifying your 1.5.8 Language file updates
Language Files - User information on Array based Language files Language Packs for Zen Cart 1.5.8 and above
Language Files - What are they and how are they used? (1.5.7-) How do I change language text in 1.5.7 or below?
Language Files - What are they and how are they used? (1.5.8+) How do I change language text in 1.5.8 and above?
Language Packs Making Zen Cart multi-language
Learning Trails for Zen Cart How do I get started learning Zen Cart?
Left and Right Columns - turning them off Three columns, two, or one - your choice
Lighthouse How can I use Google Lighthouse to test accessibility?
Linked Product - what is it? Showing a product in multiple categories
Listing Page Layout How Zen Cart shows multiple results on one page
Listing Pages New Products, Featured Products, All Products and Product listing pages
Logos in HTML emails How do I change the logo in my Zen Cart HTML emails ?
Long EZ-Pages are getting cut off Is there a size limit to EZ-Pages?
Long field indexes Creating indexes on long fields
Longer Product Name How do I increase the length of the product name field?
Manual Credit Card Collection Why you shouldn't use manual credit card processing with online stores
Manual Credit Card Collection - Migrating Away Getting off manual card collection
Master Password - Logging into a customer's account How to login to place an order for a customer
max_user_connections exceeded Seeing max_user_connections errors in logs
Meta Tags Meta Description, Meta Keywords and other Meta Tags
Missing Language Constants Fixing a missing language define in translated language packs
Missing Log Files What if Zen Cart does not write to the /logs folder?
Mixed Collation Errors How to handle "Illegal mix of collations" after upgrade
Mobile or Desktop state? Determining your visitor's screen size
More Information sidebox Making changes to the More Information sidebox
Moving to another server Steps to use when changing hosters
Moving your Zen Cart folder Switching between subfolder and root deployment, or changing subfolder name
Multi-factor authentication in Zen Cart Using two-factor authentication for admin access
Multiple PHP Versions Running more than one version of PHP
My Payment Methods aren't showing up during checkout Payment Method problems
My Site Seems To Be Down Checking Site Status
New Listing - Featured Listing - All Listing configuration settings Configuration for New Products, Featured Products and All Products pages
New Listing - Featured Listing - All Listing configuration settings for Zen Cart v1.x.x Configuration for New Products, Featured Products and All Products pages for Zen Cart v1.x.x
New Products Showing off new additions to your store
New Products - what is the age cutoff? What determines if a product is new?
New/Featured/Special/Upcoming Products sections Zen Cart Centerbox enable / disable
Newsletters Sending newsletters in Zen Cart
No data in my store after moving hosts Where is my data?
Nofollow links How can I make a link nofollow?
Offline Payment Taking payment outside the checkout flow process
Order Statuses Reflecting your order fulfillment process using order status
Other templates for Zen Cart Changing the appearance of your cart by using a new template
Other Topics Other information about SEO in Zen Cart
Overrides for New Users Template Overrides for New Users
Page 2, Page 3 and Page 4 The built-in extra pages
Page format in the admin What are the parts of an admin page?
Page format in the storefront What are the parts of a page?
Page Not Found page The built-in 404 page
Page types in the storefront What kinds of pages are available?
Pagination in Zen Cart How do you display a large number of results?
Parse error: unexpected T_STRING (or similar) How do I resolve this PHP message?
Passwords in Zen Cart Rules for passwords in Zen Cart
PayPal - Overview Start here to learn about options for using PayPal
PayPal Commerce PayPal Commerce, 3D Secure
PayPal Debug Logging Getting more information by enabling PayPal logs
PayPal Error Messages Understanding the various PayPal errors
PayPal Express Checkout setup The preferred way to use PayPal in Zen Cart
PayPal Paying with Credit Card vs a PayPal Account Customer questions regarding PayPal
PayPal RESTful The updated PayPal Integration
PayPal Standard - Potential Problems Why you shouldn't use PayPal Standard
PayPal Standard, Express and Pro - what's the difference? Zen Cart PayPal Standard, Express and Pro - what's the difference?
PayPal using one account on multiple sites Consolidating PayPal accounts
PayPal/IPN Troubleshooting Resolving problems with PayPal
PCI What is PCI and how does it affect me?
PCI Compliance Statement Myths and realities about PCI and PABP Standards
Permissions on files and folders What access levels should be used?
PHP Errors, Warnings and Deprecated messages after upgrading How to fix the most common PHP7+ messages
PHP Memory Limit Checking and updating your PHP memory\_limit
PHP Version and Configuration Changing PHP version or PHP Settings
Picking a hoster Selecting a company to host your cart
Place Order Creating an order on behalf of a Customer in Zen Cart
Plugins Plugins and Add-Ons for Zen Cart
Plugins Library How plugins are distributed
Popups Showing images in isolation
Price Reductions How price reductions are displayed
Pricing includes tax Operating in a VAT or other tax-inclusive environment
Printing Shipping Labels Options for printing shipping labels
Privacy page The privacy policy for your store
Private Messages (PM) Private Messages on the Zen Cart Forum
Privately testing a new template Allowing an admin test a new template on a live site
Product Editing Screen The screen for adding and editing products
Product Info Page The add to cart page
Product Listing configuration settings Configuration for Product Listing pages
Product Listing Page The product listing page
Product Management in Admin Adding, Editing, Deleting, Moving and Copying Products
Product Model Model number or SKU
Product Notifications Keeping customers up to date about product changes
Product Units Min and Max Quantities and Units
Products and Categories at the Same Level Restrictions on category contents
Products Status Enabling and Disabling products
Protecting pages Ensuring pages are only accessible by certain users
Quantity Discounts How do I offer discounts for bulk purchases?
Regular Periodic Maintenance What you should do to keep your store running well
Relative URLs The importance of relative versus absolute links
Release History Zen Cart Version History
Release Specific Upgrade Considerations Watch for these changes if you are upgrading and preserving customizations
Removing debug logs How do I clean out debug logs?
Renaming Your Admin Folder Obfuscating the path to your admin
Reporting a bug Steps to follow when a bug
Required Attributes not working I want to force a decision - how do I do this?
Resend Order Confirmation Email I need to resend the checkout email to a customer
Resetting the Downloads Counter on completed orders Resetting the Zen Cart Downloads Counter on completed orders
Responding to a hack What to do if the bad guys break things
Responsive Classic and Sideboxes How sideboxes are used in the responsive classic template
Responsive Classic Template for Zen Cart What is the Responsive Classic Template?
Responsive Templates What makes a template responsive?
Retirement for a Payment Module Disabling storefront access to a payment module while keeping its admin capabilities
Returns / Return Merchandise Authorization Can I institute an RMA process?
Reviews Page Allowing customers to provide product feedback
Sale Products Reducing the price on a category of products
Salemaker vs Specials Reducing prices on categories and single products
Sales Report with Graphs
Search related configuration settings Configuration values that affect search
Secure and nonsecure items Error messages "Unauthenticated content" or "connection partially encrypted"
Security Patches for Plugins List of all Plugin Security Patches
Security Patches for Zen Cart List of all Security Patches
Security Recommendations Running your site securely
Security Reporting Protocol How to report a security issue in Zen Cart
SEO Optimization Guidance for improving ranking in search engines
Server Requirements for running Zen Cart What kind of server do I need?
Setting up a test environment Using a Local Web Server to create a Development Environment
Setting up Define Pages Customizing define page content
Shipping and Returns The shipping policy for your store
Shipping Calculations Weight, tare and shipping rates
Shipping Dimensions product dimensions and shipping configuration
Shipping Exceptions How to disable shipping modules based on conditions
Shipping Problems Problems with calculating a shipping rate
Shopping Cart Page The customer's basket
Should I charge taxes? How much? What are my tax collection obligations?
Show Flags Changing the behavior of your cart from the admin
Showing EZ-Page Links What determines when an EZ-Page link appears?
Sideboxes What are Zen Cart sideboxes?
Signature Guidelines Zen Cart Forum Signature Guidelines
Single-Valued Attributes How are single-valued attributes different?
Site Footer How can I change my storefront footer layout?
Site Header How can I change my storefront header layout?
Site Map Page The store site map
Site Specific Overrides More ways to customize your cart's behavior without modifying core files
Sitemap support for EZ-Pages Adding EZ-Pages to your site map
Slideshows How do I create a slideshow?
Software Versions and why they are important PHP, Zen Cart, MySQL and JavaScript library versions
Some of my PHP files are missing the PHP closing tag at the end of the file Is a missing PHP closing tag an error?
Sorry, the page you were attempting to access cannot be found Why won't my EZ-Page show?
Sort Order for product listing pages Changing how products are sorted on an index listing page
Special Products Reducing the price on a single product
Specials Page Highlighting products with reduced prices
Square API Version Setting and changing the API version for Square
Square for PHP 8+ How to purchase the latest Square module
Square Payments Form Module The original Zen Cart Square Module (DEPRECATED)
Square WebPay How to collect payments with Square
Square WebPay - Avoiding Token Expiry Preventing "OAuth access token has expired"
Square WebPay Errors and Issues Handling problems with Square WebPay
SSL certificate - yes you need one Why your online store should be using SSL / HTTPS
Standard Upgrade - Recommended Procedure Upgrading Step By Step -- and still keep my live store running in the meantime
Start and End Dates Automatically starting and stopping Sales or Specials
Store Credit How Can I Issue Store Credit instead of a Refund
Storefront Pages - A Complete List All the pages in your storefront
Storefront search How customers can search your store
Subfolders Putting your cart in a subfolder
Suppressing sidebox display on specific pages Customizing sidebox display based on page
Switching templates Changing configuration values when template changes
System Service Status Pages Is the service I am using down?
Table Rate Shipping Module Setup How to price shipping by item weight, price or count
Tax calculations are wrong What to do when taxes don't add up
Tax configuration in Canada Calculating taxes in Canada
Tax configuration in the United States Calculating taxes in the USA
Tax Inclusive Pricing Displaying prices including taxes
Technologies used in Zen Cart What are the building blocks of Zen Cart
Template Default - what is it? What is the default template?
Template Files - What are they and how are they used? What does a template do?
Template Images What directories contain all the template images, buttons, and icons?
Template Overrides System What's the best way to change a template?
Template Pages Controlling what a page looks like
Template Updates Keeping your custom template up to date.
Testing your payment module Best practices for being sure a payment module is ready to use
The Developer's Toolkit Searching your cart files using the admin
The PHP Lifecycle How PHP evolves
There seems to be a problem connecting to our database What do I do when this message is shown?
There was a security error when trying to login Sorting out expired or invalid form submissions
Timezone (TZ) setting I want to use local time, not GMT
Tracking Inventory Stock Management in Zen Cart
Traffic Getting visitors to your Zen Cart
Turning sidebox display off/on on an EZ-Page I don't want sideboxes to show on my EZ-Pages
Understanding problems that occur after upgrading PHP versions Updating PHP causes new Debug Logs
Unknown column error after upgrade Post-upgrade blank screen when adding a record
Upcoming Products Products that will be available in the future
Updated Language Packs Language Packs that are ready for 1.5.8+
Updating your PHP Version Moving to a higher PHP version after an upgrade
Upgrading - Reference Guide Summary of Key Points For Upgrading
Upgrading and Templates What to do with your template during an upgrade
UPS Setup Shipping via United Parcel Service (UPS)
Using Customer Groups Customizing your site using Customer Groups
Using External SMTP Servers Letting someone else handle your Zen Cart email
USPS Setup Shipping via United States Postal Service
Variable Price Product or Donation How to let customers set the price of a product
Variant Stock Using POSM and tracking quantities of products with variants
VAT setup instructions Calculating taxes in a VAT jurisdiction
Version Information for Zen Cart, PHP and MySQL Version Information for Zen Cart, PHP and MySQL
Versioning How Zen Cart Releases are Numbered
Warning: An Error occurred, please refresh the page and try again. What do I do when this message is shown?
Warning: Headers already sent... Fixing this PHP warning message
Warning: I am able to write to the configuration file How do I make configuration files read-only?
Warning: Your Admin login is not secure I get a "login not secure" message in my admin - how to fix?
WAVE from WebAIM Using WAVE to run a quick accessibility test of your page
Webserver Tuning Tips Improving MySQL database performance
Welcome email The email sent when a new account is created
What are EZ-Pages? The easiest way to add content to your site
What are the best plugins? What are the best Zen Cart plugins?
What are the numbers beside the category links? Enabling or disabling category counts
What do the numbers in the Counter History box mean? Understanding admin counter history
What does "Connection to Database failed" mean? I get the message "Access denied for user myname@localhost"
What does MIXED ON mean? Ignoring attribute differences when counting products
What is a Template? Basic information about how to change your site's appearance
What is an SSL certificate? Basic information on SSL
What is CHMOD? What do those 3 digits mean?
What is STRICT mode for my database? MySQL STRICT mode and its impact
What is STRICT_ERROR_REPORTING How do I use this setting?
What is the EZ-Pages Footer Bar? Showing links to your EZ-Pages in the footer
What is the EZ-Pages Header Bar? Showing links to your EZ-Pages in the header
What is the Product Info page? The add to cart page
What is Zen Cart ? What does it do and how can I use it?
What sideboxes are available? Displaying content on the sides of a desktop view of my store
What's New with Zen Cart? Latest updates on the Zen Cart project
What's Next? What do I do to start customizing my cart?
Where are my emails stored? What file has my email?
Where is the Admin / Back-end / Control Panel interface? I don't have an "/admin" folder!
Wholesale Pricing Using wholesale pricing to add multiple price levels
Whoops timeouts after payment Error when you return to your cart after offsite payment
Why am I getting 500 INTERNAL SERVER ERROR messages? How do I resolve an HTTP 500 error?
Why am I getting 500 or 406 or 404 or 403 errors during product updates? Product Update returns HTTP status 500, 406, 404 or 403
Why are my images distorted? Fuzzy, squished or distorted images
Why can't I post? Posting to the Zen Cart Forum gives an error
Why do emails not show in HTML format? HTML email doesn't work
Why do my product names show up twice? No, you don't have double vision
Why does my define page not show up in Define Pages Editor? I can't see my custom define page in admin
Why does this plugin not work with Template Monster Templates? Plugin works with template_default or responsive_classic, but not my template
Why don't order total modules change item prices? How order total discounts are displayed
Why is the Admin area so busy? Why so many options? Also, where's the feature *I* want?
Why plugins? Why does Zen Cart use plugins?
Why should I upgrade? About upgrading and why it's part of running Zen Cart
Will this plugin work with my Zen Cart version? How to determine if a plugin will interoperate with your cart
Working with Additional Images Having multiple images for a product
XML Site Map Building a sitemap for search engines
Your Store Logo How to use your store logo in Zen Cart
Zen Cart Security Security patches and vulnerability handling process
Zones Module Setup How to price shipping by destination zone