# Oracle PDO Driver (PDO_OCI)

## 安装

If the Oracle Database is on the same machine as PHP, the database software already contains the necessary libraries. When PHP is on a different machine, use the free » Oracle Instant Client libraries. For details refer to the OCI8 Requirements section.

## PHP 8.4

此扩展已被移至 » PECL 资源库；不再与 PHP 捆绑，从 PHP 8.4.0

安装此 PECL 扩展相关的信息可在手册中标题为 PECL 扩展的安装章节中找到。更多信息如新的发行版本、下载、源文件、 维护人员信息及变更日志等，都在此处： » https://pecl.php.net/package/PDO_OCI.

## PHP < 8.4

Use --with-pdo-oci[=DIR] to install the PDO Oracle OCI extension, where the optional `[=DIR]` is the Oracle Home directory. `[=DIR]` defaults to the $ORACLE_HOME environment variable.

Use --with-pdo-oci=instantclient,prefix,version for an Oracle Instant Client SDK, where prefix and version are configured.

    // Using $ORACLE_HOME
    $ ./configure --with-pdo-oci

    // Using OIC for Linux with 10.2.0.3 RPMs with a /usr prefix
    $ ./configure --with-pdo-oci=instantclient,/usr,10.2.0.3

## 预定义常量

下列常量由此驱动定义，且仅在扩展编译入 PHP 或在运行时动态载入时可用。另外，使用此驱动时，仅会使用这些驱动特定的常量。使用其他驱动的驱动特定的常量可能会导致不可预见的情况。如果代码可运行于多个驱动，PDO::getAttribute() 可被用于获取 `PDO_ATTR_DRIVER_NAME` 属性以检查驱动。

`PDO::OCI_ATTR_ACTION` (int)

  Provides a way to specify the action on the database session.

  自以下版本起 PHP 7.2.16 and 7.3.3

`PDO::OCI_ATTR_CLIENT_INFO` (int)

  Provides a way to specify the client info on the database session.

  自以下版本起 PHP 7.2.16 and 7.3.3

`PDO::OCI_ATTR_CLIENT_IDENTIFIER` (int)

  Provides a way to specify the client identifier on the database session.

  自以下版本起 PHP 7.2.16 and 7.3.3

`PDO::OCI_ATTR_MODULE` (int)

  Provides a way to specify the module on the database session.

  自以下版本起 PHP 7.2.16 and 7.3.3

## 目录

- PDO_OCI DSN — Connecting to Oracle databases

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