これは、PHP3.09のinterbase.cから抜き出した関数表です。
まぁ、無いよりましという程度の物です。
どうぞご利用下さい。

/* {{{ proto string ibase_errmsg() */
/* Return error message */

/* {{{ proto int ibase_connect(string database [, string username] [, string password] [, string charset]) */
/* Open a connection to an InterBase database */

/* {{{ proto int ibase_pconnect(string database [, string username] [, string password]	 [, string charset] ) */
/* Open a persistent connection to an InterBase database */

/* {{{ proto int ibase_close([int link_identifier]) */
/* Close an InterBase connection */

/* {{{ proto int ibase_trans([int trans_args [, int link_identifier]]) */
/* Start transaction */

/* {{{ proto int ibase_commit([int link_identifier, ] int trans_number) */
/* Commit transaction */

/* {{{ proto int ibase_rollback([int link_identifier, ] int trans_number) */
/* Roolback transaction */

/* {{{ proto int ibase_query([int link_identifier, ]string query[,bind args]) */
/* Execute a query. */

/* {{{ proto array ibase_fetch_row(int result [,blob_flag]) */
/*	 Fetch a row  from the results of a query. */

/* {{{ proto object ibase_fetch_object(int result [,blob_flag]) */
/* Fetch a object from the results of a query. */

/* {{{ proto int ibase_free_result(int result) */
/* Free the memory used by a result. */

/* {{{ proto int ibase_prepare([int link_identifier, ]string query) */
/* Prepare a query for later execution. */

/* {{{ proto int ibase_execute(int query [,bind_args ... ]) */
/* Execute a previously prepared  query. */

/* {{{ proto int ibase_free_query(int query) */
/* Free memory used by a query */

/* {{{ proto int ibase_timefmt(string format) */
/* Sets the format of datetime columns returned from queries. Still nonfunctional. */

/* {{{ proto int ibase_num_fields(int result) */
/* Get the number of fields in result */

/* {{{ proto array ibase_field_info(int result, int field_number) */
/* Get information about a field */

/* {{{ proto int ibase_blob_create([int link_identifier]) */
/* Create blob for adding data */

/* {{{ proto int ibase_blob_open(string blob_id) */
/*	 Open blob for retriving data parts	 */

/* {{{ proto int ibase_blob_add(int blob_id, string data) */
/* Add data into created blob */

/* {{{ proto string ibase_blob_get(int blob_id, int len) */
/* Get len bytes data from open blob */

/* {{{ proto int ibase_blob_close(int blob_id) */
/* Close blob */

/* {{{ proto int ibase_blob_cancel(int blob_id) */
/* Cancel creating blob */

/* {{{ proto object ibase_blob_info(string blob_id_str) */
/* Return blob length and other useful info */

/* {{{ proto int ibase_blob_echo(string blob_id_str) */
/* Output blob contents to browser	*/

/* {{{ proto string ibase_blob_import([link_identifier, ] file_id) */
/* Create blob, copy file in it, and close it*/