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# dbx_connect

(PHP 4 >= 4.0.6, PHP 5)

dbx_connect -- Open a connection/database

## Description

object dbx_connect ( mixed module, string host, string database, string username, string password [, int persistent])

dbx_connect() returns an object on success, `FALSE` on error. If a connection has been made but the database could not be selected, the connection is closed and `FALSE` is returned. The persistent parameter can be set to `DBX_PERSISTENT`, if so, a persistent connection will be created.

The module parameter can be either a string or a constant, though the latter form is preferred. The possible values are given below, but keep in mind that they only work if the module is actually loaded.

- `DBX_MYSQL` or "mysql"

- `DBX_ODBC` or "odbc"

- `DBX_PGSQL` or "pgsql"

- `DBX_MSSQL` or "mssql"

- `DBX_FBSQL` or "fbsql" (available from PHP 4.1.0)

- `DBX_SYBASECT` or "sybase_ct" (available from PHP 4.2.0)

- `DBX_OCI8` or "oci8" (available from PHP 4.3.0)

- `DBX_SQLITE` or "sqlite" (CVS only)

The host, database, username and password parameters are expected, but not always used depending on the connect functions for the abstracted module.

The returned object has three properties:

database

  It is the name of the currently selected database.

handle

  It is a valid handle for the connected database, and as such it can be used in module-specific functions (if required).

  `<?php $link = dbx_connect(DBX_MYSQL, "localhost", "db", "username", "password"); mysql_close($link->handle); // dbx_close($link) would be better here ?>`

module

  It is used internally by dbx only, and is actually the module number mentioned above.

示範 1.dbx_connect() example
`<?php $link = dbx_connect(DBX_ODBC, "", "db", "username", "password", DBX_PERSISTENT) or die("Could not connect"); echo "Connected successfully"; dbx_close($link); ?>`

> 備注: Always refer to the module-specific documentation as well.

See also dbx_close().

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