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下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
The following constants can be passed to ibase_trans() to specify transaction behaviour.
| Constant | Description |
|---|---|
| IBASE_DEFAULT | The default transaction settings are to be used. This default is determined by the client library, which defines it as IBASE_WRITE|IBASE_CONCURRENCY|IBASE_WAIT in most cases. |
| IBASE_READ | Starts a read-only transaction. |
| IBASE_WRITE | Starts a read-write transaction. |
| IBASE_CONSISTENCY | Starts a transaction with the isolation level set to 'consistency', which means the transaction cannot read from tables that are being modified by other concurrent transactions. |
| IBASE_CONCURRENCY | Starts a transaction with the isolation level set to 'concurrency' (or 'snapshot'), which means the transaction has access to all tables, but cannot see changes that were committed by other transactions after the transaction was started. |
| IBASE_COMMITTED | Starts a transaction with the isolation level set to
'read committed'. This flag should be combined with either
IBASE_REC_VERSION or
IBASE_REC_NO_VERSION . This isolation level
allows access to changes that were committed after the transaction
was started. If IBASE_REC_NO_VERSION was
specified, only the latest version of a row can be read. If
IBASE_REC_VERSION was specified, a row can
even be read when a modification to it is pending in a concurrent
transaction.
|
| IBASE_WAIT | Indicated that a transaction should wait and retry when a conflict occurs. |
| IBASE_NOWAIT | Indicated that a transaction should fail immediately when a conflict occurs. |
The following constants can be passed to ibase_fetch_row() , ibase_fetch_assoc() or ibase_fetch_object() to specify fetch behaviour.
| Constant | Description |
|---|---|
| IBASE_FETCH_BLOBS | Also available as IBASE_TEXT for backward
compatibility. Causes BLOB contents to be fetched inline, instead of
being fetched as BLOB identifiers. |
| IBASE_FETCH_ARRAYS | Causes arrays to be fetched inline. Otherwise, array identifiers are returned. Array identifiers can only be used as arguments to INSERT operations, as no functions to handle array identifiers are currently available. |
| IBASE_UNIXTIME | Causes date and time fields not to be returned as strings, but as UNIX timestamps (the number of seconds since the epoch, which is 1-Jan-1970 0:00 UTC). Might be problematic if used with dates before 1970 on some systems. |
The following constants are used to pass requests and options to the service API functions ( ibase_server_info() , ibase_db_info() , ibase_backup() , ibase_restore() and ibase_maintain_db() ). Please refer to the Firebird/InterBase manuals for the meaning of these options.
IBASE_BKP_IGNORE_CHECKSUMS IBASE_BKP_IGNORE_LIMBO IBASE_BKP_METADATA_ONLY IBASE_BKP_NO_GARBAGE_COLLECT IBASE_BKP_OLD_DESCRIPTIONS IBASE_BKP_NON_TRANSPORTABLE IBASE_BKP_CONVERT IBASE_RES_DEACTIVATE_IDX IBASE_RES_NO_SHADOW IBASE_RES_NO_VALIDITY IBASE_RES_ONE_AT_A_TIME IBASE_RES_REPLACE IBASE_RES_CREATE IBASE_RES_USE_ALL_SPACE IBASE_PRP_PAGE_BUFFERS IBASE_PRP_SWEEP_INTERVAL IBASE_PRP_SHUTDOWN_DB IBASE_PRP_DENY_NEW_TRANSACTIONS IBASE_PRP_DENY_NEW_ATTACHMENTS IBASE_PRP_RESERVE_SPACE IBASE_PRP_RES_USE_FULL IBASE_PRP_RES IBASE_PRP_WRITE_MODE IBASE_PRP_WM_ASYNC IBASE_PRP_WM_SYNC IBASE_PRP_ACCESS_MODE IBASE_PRP_AM_READONLY IBASE_PRP_AM_READWRITE IBASE_PRP_SET_SQL_DIALECT IBASE_PRP_ACTIVATE IBASE_PRP_DB_ONLINE IBASE_RPR_CHECK_DB IBASE_RPR_IGNORE_CHECKSUM IBASE_RPR_KILL_SHADOWS IBASE_RPR_MEND_DB IBASE_RPR_VALIDATE_DB IBASE_RPR_FULL IBASE_RPR_SWEEP_DB IBASE_STS_DATA_PAGES IBASE_STS_DB_LOG IBASE_STS_HDR_PAGES IBASE_STS_IDX_PAGES IBASE_STS_SYS_RELATIONS IBASE_SVC_SERVER_VERSION IBASE_SVC_IMPLEMENTATION IBASE_SVC_GET_ENV IBASE_SVC_GET_ENV_LOCK IBASE_SVC_GET_ENV_MSG IBASE_SVC_USER_DBPATH IBASE_SVC_SVR_DB_INFO IBASE_SVC_GET_USERS