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# LXVI. Ingres II Functions

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These functions allow you to access Ingres II database servers.

> 注: If you already used PHP extensions to access other database servers, note that Ingres doesn't allow concurrent queries and/or transaction over one connection, thus you won't find any result or transaction handle in this extension. The result of a query must be treated before sending another query, and a transaction must be committed or rolled back before opening another transaction (which is automatically done when sending the first query).

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To compile PHP with Ingres support, you need the Open API library and header files included with Ingres II.

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This PECL extension is not bundled with PHP. Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/ingres.

In order to have these functions available, you must compile PHP with Ingres support by using the --with-ingres[=DIR] option, where DIR is the Ingres base directory, which defaults to `/II/ingres`. If the II_SYSTEM environment variable isn't correctly set you may have to use --with-ingres=DIR to specify your Ingres installation directory.

When using this extension with Apache, if Apache does not start and complains with "PHP Fatal error: Unable to start ingres_ii module in Unknown on line 0" then make sure the environment variable II_SYSTEM is correctly set. Adding "export II_SYSTEM="/home/ingres/II" in the script that starts Apache, just before launching httpd, should be fine.

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表格 1. Ingres configuration options

Name | Default | Changeable | Changelog
--- | --- | --- | ---
ingres.allow_persistent | "1" | PHP_INI_SYSTEM | Available since PHP 4.0.2.
ingres.max_persistent | "-1" | PHP_INI_SYSTEM | Available since PHP 4.0.2.
ingres.max_links | "-1" | PHP_INI_SYSTEM | Available since PHP 4.0.2.
ingres.default_database | NULL | PHP_INI_ALL | Available since PHP 4.0.2.
ingres.default_user | NULL | PHP_INI_ALL | Available since PHP 4.0.2.
ingres.default_password | NULL | PHP_INI_ALL | Available since PHP 4.0.2.
ingres.report_db_warnings | "1" | PHP_INI_ALL | Available since version 1.1.0 of the PECL extension.
ingres.cursor_mode | "0" | PHP_INI_ALL | Available since version 1.1.0 of the PECL extension.
ingres.blob_segment_length | "4096" | PHP_INI_ALL | Available since version 1.2.0 of the PECL extension.

For further details and definitions of the PHP_INI_* constants, see the 附錄 G.

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`INGRES_ASSOC` (integer)

  Columns are returned into the array having the fieldname as the array index.

`INGRES_NUM` (integer)

  Columns are returned into the array having a numerical index to the fields. This index starts with 1, the first field in the result.

`INGRES_BOTH` (integer)

  Columns are returned into the array having both a numerical index and the fieldname as the array index.

`INGRES_EXT_VERSION` (string)

  Specifies the version of the Ingres Extension. Available since version 1.2.0 of the PECL extension.

`INGRES_API_VERSION` (integer)

  Specifies the version of Ingres OpenAPI the extension was built against. Available since version 1.2.0 of the PECL extension.

`INGRES_CURSOR_READONLY` (integer)

  Specifies that Ingres cursors should be opened in 'readonly' mode. Available since version 1.2.0 of the PECL extension.

`INGRES_CURSOR_UPDATE` (integer)

  Specifies that Ingres cursors should be opened 'for update'. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_MULTINATIONAL` (integer)

  Equivalent to the II_DATE_FORMAT setting of MULTINATIONAL. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_MULTINATIONAL4` (integer)

  Equivalent to the II_DATE_FORMAT setting of MULTINATIONAL4. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_FINNISH` (integer)

  Equivalent to the II_DATE_FORMAT setting of FINNISH. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_ISO` (integer)

  Equivalent to the II_DATE_FORMAT setting of ISO. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_ISO4` (integer)

  Equivalent to the II_DATE_FORMAT setting of ISO4. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_GERMAN` (integer)

  Equivalent to the II_DATE_FORMAT setting of GERMAN. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_MDY` (integer)

  Equivalent to the II_DATE_FORMAT setting of MDY. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_DMY` (integer)

  Equivalent to the II_DATE_FORMAT setting of DMY. Available since version 1.2.0 of the PECL extension.

`INGRES_DATE_YMD` (integer)

  Equivalent to the II_DATE_FORMAT setting of YMD. Available since version 1.2.0 of the PECL extension.

`INGRES_MONEY_LEADING` (integer)

  Specifies the currency character that should be placed at the start of a money value. Equivalent to setting II_MONEY_FORMAT to 'L:'. Available since version 1.2.0 of the PECL extension.

`INGRES_MONEY_TRAILING` (integer)

  Specifies the currency character that should be placed at the end of a money value. Equivalent to setting II_MONEY_FORMAT to 'T:'. Available since version 1.2.0 of the PECL extension.

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