ODBC（开放数据库连接）

ODBC是“开放数据库互联的简称”（Open Database Connectivity）的简称。ODBC是MicroSoft公司提出的应用程序通用编程接口标准，用于对数据库的访问。

ODBC实际上是一个数据库访问函数库，使应用程序可以直接操纵数据库中的数据。ODBC是基于SQL语言的，是一种在SQL和应用界面之间的标准接口，他解决了嵌入式SQL接口非规范核心，免除了应用软件随数据库的改变而改变的麻烦。ODBC的一个显著优点是，用它生成的程序是与数据库或数据库引擎无关的，为数据库用户和开发人员屏蔽了异构环境的复杂性，提供了数据库访问的统一接口，为应用程序实现与平台的无关性和可移植性提供了基础，因而ODBC获得了广泛的支持和应用。

安装

--with-adabas[=DIR]

Include Adabas D support. DIR is the Adabas base install directory, defaults to/usr/local.

--with-sapdb[=DIR]

Include SAP DB support. DIR is SAP DB base install directory, defaults to/usr/local.

--with-solid[=DIR]

Include Solid support. DIR is the Solid base install directory, defaults to/usr/local/solid.

--with-ibm-db2[=DIR]

Include IBM DB2 support. DIR is the DB2 base install directory, defaults to/home/db2inst1/sqllib.

--with-empress[=DIR]

Include Empress support. DIR is the Empress base install directory, defaults to$EMPRESSPATH. This option only supports Empress Version 8.60 and above.

--with-empress-bcs[=DIR]

Include"Empress Local Access"support. DIR is the Empress base install directory, defaults to$EMPRESSPATH. This option only supports Empress Version 8.60 and above.

--with-birdstep[=DIR]

Include Birdstep support. DIR is the Birdstep base install directory, defaults to/usr/local/birdstep.

--with-custom-odbc[=DIR]

Include a user defined ODBC support. The DIR is ODBC install base directory, which defaults to/usr/local. Make sure to define CUSTOM_ODBC_LIBS and have someodbc.hin your include dirs. E.g., you should define following for Sybase SQL Anywhere 5.5.00 on QNX, prior to run configure script:

   CPPFLAGS="-DODBC_QNX -DSQLANY_BUG"
   LDFLAGS=-lunix
   CUSTOM_ODBC_LIBS="-ldblib -lodbc".

--with-iodbc[=DIR]

Include iODBC support. DIR is the iODBC base install directory, defaults to/usr/local.

--with-esoob[=DIR]

Include Easysoft OOB support. DIR is the OOB base install directory, defaults to/usr/local/easysoft/oob/client.

--with-unixODBC[=DIR]

Include unixODBC support. DIR is the unixODBC base install directory, defaults to/usr/local.

--with-openlink[=DIR]

Include OpenLink ODBC support. DIR is the OpenLink base install directory, defaults to/usr/local. This is the same as iODBC.

--with-dbmaker[=DIR]

Include DBMaker support. DIR is the DBMaker base install directory, defaults to where the latest version of DBMaker is installed (such as/home/dbmaker/3.6).

PHP的 Windows 版本已内建对此扩展的支持。不需要载入额外的扩展来使用这些函数。

As of PHP 7.0.0, however, Windows users must enablephp_odbc.dllin order to use this extension.

运行时配置

这些函数的行为受php.ini中的设置影响。