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.