In PHP 5 there are some new firebird functions if you migrate from php4. Here is the list of them:

• ibase_affected_rows() - Return the number of rows that were affected by the previous query
• ibase_backup() - Initiates a backup task in the service manager and returns immediately
• ibase_commit_ret() - Commit a transaction without closing it
• ibase_db_info() - Request statistics about a database
• ibase_drop_db() - Drops a database
• ibase_errcode() - Return an error code
• ibase_free_event_handler() - Cancels a registered event handler
• ibase_gen_id() - Increments the named generator and returns its new value
• ibase_maintain_db() - Execute a maintenance command on the database server
• ibase_name_result() - Assigns a name to a result set
• ibase_num_params() - Return the number of parameters in a prepared query
• ibase_param_info() - Return information about a parameter in a prepared query
• ibase_restore() - Initiates a restore task in the service manager and returns immediately
• ibase_rollback_ret() - Rollback transaction and retain the transaction context
• ibase_server_info() - Request statistics about a database server
• ibase_service_attach() - Connect to the service manager
• ibase_service_detach() - Disconnect from the service manager
• ibase_set_event_handler() - Register a callback function to be called when events are posted
• ibase_wait_event() - Wait for an event to be posted by the database