Codex (category)

This article explains the usage of the ThickBox API for creating modal windows in the WordPress admin area, including examples and parameters for customization.

Support for page templates ("page" post type) has been unchanged for 12 years. And it helped developers to conveniently create templates for pages, but it has always...

Using child themes in Wordpress is a valid way to modify an existing theme, but the CSS @import directive is slow, so it's worth avoiding.

It takes 200ms to load...

Not everyone knows that in WordPress a single post or page can be divided into several parts, thus organizing the pagination for the post. To do this you need to use...

We often use functions to retrieve some data on a page and are unaware that this data can be taken from global variables. For example, the name of the author on the...

Introduction to using the HTTP API in WordPress, including the basics of sending requests and handling responses. Learn about the functions and their parameters, as...

Passing variables by reference in WordPress filters and events, and passing objects by reference.

This article explains the concept of feeds (RSS) in WordPress, how they work, how to disable them, the types of content and feed formats, feed URLs, and the PHP...

Tutorial on adding customizable pagination to tables created using WP_List_Table in WordPress admin.

Here you find reserved names which should not be used as variable names for POST, GET requests. Also it is not recommended to use them when creating custom post types,...

The article shows the ways of creating templates for WordPress pages. Each way has its pros and cons, and before I start, allow me to introduce the meaning of the...

Must-use plugins (mu-plugins) - mandatory plugins that are installed in a special /wp-content/mu-plugins folder. They are always active for the site and all sites of...

This article explains the WordPress Options API, detailing how to register, add, and display option fields and sections in settings pages.

In October 2013, WordPress version 3.7 was released, and along with it came a new feature - automatic updates.

Autoupdate became the brightest, most useful, and...

I was worried about a question: how can I use $wpdb object and site database with which I work, but with minimal loading of WP environment. Sometimes it is necessary,...