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PDO
See Also
Description
This driver supports connections using the standardized PHP Data Objects connection. The pdo
driver itself cannot be used, it must be used with one of the supported databases:
- pdo_mssql (SQL Server with FREETDS)
- pdo_mysql (MySQL)
- pdo_oci (Oracle)
- pdo_pgsql (Postgresql)
- pdo_sqlite (SQLite)
- pdo_sqlsrv (SQL Server with Windows)
Establishing A Connection
To establish a connection, the DSN style of connection must be used, the first argument of the DSN string being the database type, e.g. to connect to a MySQL database:
include_once 'adodb/adodb.inc.php'; $db = ADOnewConnection('pdo'); $user = 'pdo-user'; $password = 'pdo-pass'; $dsnString= 'host=localhost;dbname=employees;charset=utf8mb4' $db->connect('mysql:' . $dsnString,$user,$password);
Note that in the above example, the database type is separated from the rest of the DSN string by a : (colon). The rest of the DSN arguments are separated by a ; (semi-colon).
Preferred Drivers
In all cases, using native drivers (listed below) provides better functionality, as well as performance, than the equivalent PDO driver.
The PDO setAttribute function
As of ADOdb 5.21, the PDO::setAttribute() method can be emulated using setConnectionParameter().
Individual Driver Status
pdo_mssql
Preferred Driver
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Inactive1) |
Windows | No |
Unix | Yes |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
The current status of this driver is unknown
pdo_mysql
Preferred Driver
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Active2) |
Windows | Yes |
Unix | No |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
- Some Meta functions are unavailable
Sample Connection String
include 'adodb-dir/adodb.inc.php'; $db = ADOnewConnection('pdo'); $user = 'user'; $password = 'password' $db->connect('mysql:hostname=127.0.0.1;database=employees;',$user,$password);
pdo_oci
Preferred Driver
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Inactive3) |
Windows | Yes |
Unix | No |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
The current status of this driver is unknown
pdo_pgsql
Preferred Driver
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Inactive4) |
Windows | Yes |
Unix | No |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
The current status of this driver is unknown
pdo_sqlite
Preferred Driver
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Active5) |
Windows | Yes |
Unix | No |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
Sample Connection String
include 'adodb-dir/adodb.inc.php'; $db = ADOnewConnection('pdo'); $db->connect('sqlite:/home/sqlite/adodb-sqlite.db','root');
pdo_sqlsrv
Preferred Driver
Native Mode Driver
ODBC Driver for SQL Server
Specification
Driver Name | pdo |
---|---|
Data Provider | pdo |
Status | Active6) |
Windows | Yes |
Unix | No |
ADOdb V5 | Yes |
ADOdb V6 | Yes |
- This driver requires the installation of the Microsoft native client library, as well as the Microsoft SQL Server PDO drivers for PHP
- Dates are always returned as strings
- Most Meta functions are unsupported
- setConnectionParameter() is not supported, so changing the character set at run-time is not available.
Sample Connection String
include 'adodb-dir/adodb.inc.php'; $db = ADOnewConnection('pdo'); $user = 'user'; $password = 'password' $db->connect('sqlsrv:server=SERVER\SQLEXPRESS;database=NORTHWND;',$user,$password);