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Horde_Db

Horde_Db provides database connection abstraction and SQL compatibility tools for a number of database systems and PHP extensions. It currently supports the following databases and extensions:

+-------------+----------+
|Database     |Extension |
+-------------+----------+
|MySQL/MariaDB|mysql     |
|             +----------+
|             |mysqli    |
|             +----------+
|             |PDO_mysql |
+-------------+----------+
|PostgreSQL   |PDO_pgsql |
+-------------+----------+
|SQLite       |PDO_sqlite|
+-------------+----------+
|Oracle       |oci8      |
+-------------+----------+

Advanced features include:

- Connection abstraction
- SQL compatibility tools
- Database schema management
- Master/server configuration with queries split to write and read instances
- BLOB/CLOB handling
- Caching
- Query logging

Connection management

Connecting to a database is as simple as instantiating a class implementing the Horde_Db_Adapter interface, providing the necessary connection parameters:

MySQL

Please note that the mysql PHP extension is deprecated as of PHP 7, as is the Horde_Db_Adapter_Mysql backend.

$config = [
    'host'     => 'localhost',
    'username' => 'user',
    'password' => 'secret',
    'database' => 'db',
];
$db = new Horde_Db_Adapter_Mysqli($config);
$db = new Horde_Db_Adapter_Pdo_Mysql($config);
$db = new Horde_Db_Adapter_Mysql($config);

Full list of connection parameters:

+---------------+---------+--------------------------------------+
|Parameter      |Mandatory|Meaning                               |
+---------------+---------+--------------------------------------+
|charset        |         |Connection character set              |
+---------------+---------+--------------------------------------+
|database/dbname|         |Database name                         |
+---------------+---------+--------------------------------------+
|host           |         |Host name, if using TCP connection (1)|
+---------------+---------+--------------------------------------+
|port           |         |Port number, if using TCP connection  |
+---------------+---------+--------------------------------------+
|socket         |         |Socket location, if using Unix sockets|
+---------------+---------+--------------------------------------+
|username       |X        |Database user                         |
+---------------+---------+--------------------------------------+

.:1 To workaround MySQL automatically using the unix socket if setting the host to 'localhost', the hostname will be translated from 'localhost' to '127.0.0.1' if using the TCP protocol