Relational DataBase Management System (RDBMS)

RDBMS stands for Relational DataBase Management System. It may also be called a SQL server.

PHP can connect to multiple RDBMS: MySQL, Oracle, MariaDB, SQLite3, MSSQL, PostGreSQL, etc.

PHP offers a native abstraction layer: PDO. There are database abstraction as components too.

Related : PHP Data Objects (PDO), Structured Query Language (SQL), Storage Systems, SQLite3, MySQL, PostgreSQL, Abstraction Layer

Related packages : doctrine/dbal, adodb/adodb-php, nextras/dbal