WordPress Codex is the Holy Bible for WordPress documentation.
There are tons of pages with documentation and it is categorized really simple so you can quickly refer to any section regarding what do you need.
You can find “WordPress for Beginners”, “Designing Your WordPress Site“, “Lessons for Theme Development” and “Website Development“.
The information in this sections is a great resource to become a WordPress expert starting from zero, is an online manual that WordPress itself, thru their developers maintain updated with all the information. Learn More
A typical requirement of many websites I’ve created is to display a particaluar graphic on a section of a website, or Nodes containing a certain field value association. This is used by Designers to give a visual indication of what section of a website a visitor is seeing. By default most Drupal themes do not include this type of functionality enabled by default. Here are 2 approaches to enabling this functionality. Learn More
In the last article, we saw how to redirect users after login based on a user group setting. In this one, we’ll see how to do it on the basis of their user group memberships, but we won’t use a user group setting, and we’ll control the order in which the groups are checked. Since we don’t know who the user is until *after* they’ve logged in, we need to put the code in a plugin connected to the OnWebLogin System Event. Learn More