Use custom fields to improve the user experience in any part of your WordPress site. Once we have created all the fields that we want in the group, all that remains is to choose the display rules. You’ll then post the group and it should start appearing on the post’s edit page (or any other place we choose).
No knowledge of programming language
If you’re not proficient in PHP, the only way to create a custom array in WordPress is to use a plugin. Advanced Custom Fields (often abbreviated ACF) is the most popular plugin for creating custom fields in WordPress. It is available as a free plugin and the free version supports about 31 types of fields, including WYSIWYG editor, text, file, email and number.
One of the most used plugins
With advanced custom fields, you can enrich your pages and blog posts with additional data and information with an easy-to-use solution. This plugin is active on more than 1 million websites and has a 4.9-star rating from over 1,000 reviews.
You can find the plugin for download in the WordPress site administration in the category »Plugins« and »Plugin Installation« under the name »Advanced Custom Fields«.