Create, Read, Update, and Delete (CRUD) operations are the most basic database operations, but they are also the most crucial. CRUD operations are usually done using the Structured Query Language (SQL) on relational database systems. As the Web is becoming more data-oriented, there is a need to shift from SQL-based CRUD operations to semantic Web-based CRUD operations. In this article, learn how to use PHP to perform CRUD operations over the semantic Web.