PropelDatabase

Propel is an open-source Object-Relational Mapper (ORM) for PHP. It simplifies database interactions by allowing developers to work with database tables as if they were PHP objects. This means instead of writing raw SQL queries, developers can use PHP code to create, read, update, and delete data. Propel generates PHP classes based on an XML schema definition of the database. This schema defines the tables, columns, relationships, and other database structures.

The core functionality of Propel includes a query builder, which provides a fluent interface for constructing database queries. It handles the translation of these object-oriented operations into SQL. Propel also manages object hydration, where data retrieved from the database is mapped to PHP objects. Furthermore, it supports relationships between objects, such as one-to-one, one-to-many, and many-to-many, making it easier to navigate and manage related data.

Propel aims to improve developer productivity by abstracting away much of the complexity of direct database programming. It promotes maintainable and readable code by adhering to object-oriented principles. The ORM supports various database systems, including MySQL, PostgreSQL, SQLite, and others. Its development is community-driven, and it has been used in numerous PHP projects.