PHP- Technology PDO

PDO - PHP Data Objects - is a database access layer providing a uniform method of access to multiple databases." It doesn't account for database-specific syntax, but can allow for the process of switching databases and platforms to be fairly painless, simply by switching the connection string in many instances

PDO is an acronym for PHP Data Objects. PDO is a lean, consistent way to access databases. This means developers can write portable code much easier. PDO is not an abstraction layer like PearDB. PDO is a more like a data access layer which uses a unified API (Application Programming Interface)

What is difference between mysql,mysqli and pdo ? ... mysqli is a replacement for the mysql functions, with object-oriented and procedural versions. It has support for prepared statements. PDO (PHP Data Objects) is a general database abstraction layer with support for MySQL among many other databases.