The following drivers currently implement the PDO interface:
| Driver name | Supported databases |
|---|---|
| PDO_CUBRID | Cubrid |
| PDO_DBLIB | FreeTDS / Microsoft SQL Server / Sybase |
| PDO_FIREBIRD | Firebird |
| PDO_IBM | IBM DB2 |
| PDO_INFORMIX | IBM Informix Dynamic Server |
| PDO_MYSQL | MySQL 3.x/4.x/5.x |
| PDO_OCI | Oracle Call Interface |
| PDO_ODBC | ODBC v3 (IBM DB2, unixODBC and win32 ODBC) |
| PDO_PGSQL | PostgreSQL |
| PDO_SQLITE | SQLite 3 and SQLite 2 |
| PDO_SQLSRV | Microsoft SQL Server / SQL Azure |
| PDO_4D | 4D |