Hi buddy, first i recommend you to use adodb.

http://php.weblogs.com/ADODB
you should use the complete path of your database
file, this is an example using adodb.

$conn->PConnect("localhost:/var/firebird/databse.gdb",
"sysdba", "masterkey", "");

NOTE:
Don't forget to compile PHP with interbase support.

Greetings :D







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