PHP unlimited classification Category class library

12 Jul 2016

PHP unlimited classification gets the top classification ID, PHP top level. PHP unlimited classification gets the top-level classification ID. PHP top-level has such a table, id is the ID of the classification, name is the classification name, and pid is the ID of the upper-level classification. Now there is a category ID, and the program needs to find it

12 Jul 2016

Get the number of articles under a specified category and its subcategories in WordPress, the number of WordPress articles. Get the number of articles under a specified category and its subcategories in WordPress. Number of WordPress articles. Get the number of articles in a specific category. Sometimes we want to get the number of articles under a certain category (category).

15 Dec 2025

This tutorial details how to use the Weka machine learning library to read ARFF (Attribute-Relation File Format) files efficiently and accurately in Java applications. We will focus on explaining the use of weka.core.converters.ConverterUtils.DataSource class for data loading, and how to correctly set the category index of the data set, and provide complete code examples and best practices to ensure that the data can be correctly parsed and processed by Weka.

23 Nov 2025

The Elementor theme builder allows you to easily dynamically display corresponding category articles on the category archive page through the "Article Archive" widget and "Current Query" settings. This tutorial will guide you on how to use this feature to avoid unnecessary complex custom code, efficiently build dynamic content pages, and ensure that the article content of the category page automatically matches the current category context.

25 Dec 2025

AI projects are divided into five categories: 1. The platform category builds decentralized AI infrastructure, such as Bittensor, NEAR, and Sahara; 2. The tool resource category provides markets for production materials such as computing power, such as Render, Akash, and Ocean; 3. The application agent category encapsulates AI into composable components on the chain, such as Fe tch.ai, SingularityNET, AAN; 4. The data sovereignty category ensures that the data is trustworthy and verifiable, such as Modulus, Privy, and Verida; 5. The protocol upgrade category embeds AI into consensus and governance, such as EigenLayer, Worldcoin, and Celestia.

11 Nov 2025

Use the attribute selector to select elements based on the data attribute. For example, [data-type="submit"] matches the exact value, [data-highlight] matches the existence of the attribute, and [data-category*="news"], [data-category^="top"], and [data-category$="post"] matches the value included, at the beginning, and at the end respectively.