You must install the FrontBase database server or at least the
     fbsql client libraries to use this functions. You can get FrontBase
     from http://www.frontbase.com/.
    
  In order to have these functions available, you must compile PHP with
  fbsql support by using the
  --with-fbsql[=DIR] option. If you use
  this option without specifying the path to fbsql, PHP will search for the
  fbsql client libraries in the default installation location for the
  platform. Users who installed FrontBase in a non standard directory should
  always specify the path to fbsql:
  --with-fbsql=/path/to/fbsql. This will
  force PHP to use the client libraries installed by FrontBase, avoiding any
  conflicts.
 
The behaviour of these functions is affected by settings in php.ini.
 
Table 1. FrontBase configuration options
| Name | Default | Changeable | Changelog | 
|---|
| fbsql.allow_persistent | "1" | PHP_INI_SYSTEM | Available since PHP 4.2.0. | 
| fbsql.generate_warnings | "0" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.autocommit | "1" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.max_persistent | "-1" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.max_links | "128" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.max_connections | "128" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.max_results | "128" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.batchSize | "1000" | PHP_INI_SYSTEM |  | 
| fbsql.default_host | NULL | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.default_user | "_SYSTEM" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.default_password | "" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.default_database | "" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
| fbsql.default_database_password | "" | PHP_INI_SYSTEM | Available since PHP 4.0.6. | 
 For further details and definitions of the 
PHP_INI_* constants, see the 
Appendix G.
 
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.