Canonical Snippet Tutorial

I could tell you how many hours it takes to develop a MODX extra Transport Package complete with a build script, properties, multiple MODX elements, internationalized strings, error checks, and then fully test it, but you wouldn't believe me. If you use this extra and like it, please consider donating. The suggested donation for this extra is $5.00, but any amount you want to give is fine (really). For a one-time donation of $50.00 you can use all of my non-commercial extras with a clear conscience.


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The Canonical snippet places a proper canonical tag in the head section of pages. It executes only for Symlinks to prevent search engine penalties for duplicate content.

Installing Canonical

Go to System | Package Management on the main menu in the MODX Manager and click on the "Download Extras" button. That will take you to the Revolution Repository (AKA Web Transport Facility). Put Canonical in the search box and press Enter. Click on the "Download" button, and once the package is downloaded, click on the "Back to Package Manager" button. That should bring you back to your Package Management grid. Click on the "Install" button next to Canonical in the grid. The Canonical package should now be installed.

Usage

Place the following tag in the <head> section of all templates:

[[!Canonical]]

 

My book, MODX: The Official Guide - Digital Edition is now available here. The paper version of the book is available from Amazon.

If you have the book and would like to download the code, you can find it here.

If you have the book and would like to see the updates and corrections page, you can find it here.

MODX: The Official Guide is 772 pages long and goes far beyond this web site in explaining beginning and advanced MODX techniques. It includes detailed information on:

  • Installing MODX
  • How MODX Works
  • Working with MODX resources and Elements
  • Using Git with MODX
  • Using common MODX add-on components like SPForm, Login, getResources, and FormIt
  • MODX security Permissions
  • Customizing the MODX Manager
  • Using Form Customization
  • Creating Transport Packages
  • MODX and xPDO object methods
  • MODX System Events
  • Using PHP with MODX

Go here for more information about the book.

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  —  Bob Ray