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).
| 警告 |
本扩展模块是实验性的。该模块的行为，包括其函数的名称以及其它任何关于此模块的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。我们提醒您在使用本扩展模块的同时自担风险。 |
To compile PHP with Ingres support, you need the Open API library and header files included with Ingres II.
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.
这些函数的行为受到全局配置文件 php.ini 的影响。
表格 1. Ingres II configuration options
| Name | Default | Changeable |
|---|---|---|
| ingres.allow_persistent | "1" | PHP_INI_SYSTEM |
| ingres.max_persistent | "-1" | PHP_INI_SYSTEM |
| ingres.max_links | "-1" | PHP_INI_SYSTEM |
| ingres.default_database | NULL | PHP_INI_ALL |
| ingres.default_user | NULL | PHP_INI_ALL |
| ingres.default_password | NULL | PHP_INI_ALL |
该扩展模块未定义任何资源类型。