Php/docs/ibase.constants
预定义常量
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_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_TEXTfor 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- Options to ibase_backup()
IBASE_BKP_IGNORE_LIMBO- Options to ibase_backup()
IBASE_BKP_METADATA_ONLY- Options to ibase_backup()
IBASE_BKP_NO_GARBAGE_COLLECT- Options to ibase_backup()
IBASE_BKP_OLD_DESCRIPTIONS- Options to ibase_backup()
IBASE_BKP_NON_TRANSPORTABLE- Options to ibase_backup()
IBASE_BKP_CONVERT- Options to ibase_backup()
IBASE_RES_DEACTIVATE_IDX- Options to ibase_restore()
IBASE_RES_NO_SHADOW- Options to ibase_restore()
IBASE_RES_NO_VALIDITY- Options to ibase_restore()
IBASE_RES_ONE_AT_A_TIME- Options to ibase_restore()
IBASE_RES_REPLACEIBASE_RES_CREATE- Options to ibase_restore()
IBASE_RES_USE_ALL_SPACE- Options to ibase_restore()
IBASE_PRP_PAGE_BUFFERSIBASE_PRP_SWEEP_INTERVALIBASE_PRP_SHUTDOWN_DBIBASE_PRP_DENY_NEW_TRANSACTIONSIBASE_PRP_DENY_NEW_ATTACHMENTSIBASE_PRP_RESERVE_SPACEIBASE_PRP_RES_USE_FULLIBASE_PRP_RESIBASE_PRP_WRITE_MODEIBASE_PRP_WM_ASYNCIBASE_PRP_WM_SYNCIBASE_PRP_ACCESS_MODEIBASE_PRP_AM_READONLYIBASE_PRP_AM_READWRITEIBASE_PRP_SET_SQL_DIALECTIBASE_PRP_ACTIVATEIBASE_PRP_DB_ONLINEIBASE_RPR_CHECK_DBIBASE_RPR_IGNORE_CHECKSUMIBASE_RPR_KILL_SHADOWSIBASE_RPR_MEND_DBIBASE_RPR_VALIDATE_DBIBASE_RPR_FULLIBASE_RPR_SWEEP_DB- Options to ibase_maintain_db()
IBASE_STS_DATA_PAGESIBASE_STS_DB_LOGIBASE_STS_HDR_PAGESIBASE_STS_IDX_PAGESIBASE_STS_SYS_RELATIONS- Options to ibase_db_info()
IBASE_SVC_SERVER_VERSION- Options to ibase_server_info()
IBASE_SVC_IMPLEMENTATION- Options to ibase_server_info()
IBASE_SVC_GET_ENV- Options to ibase_server_info()
IBASE_SVC_GET_ENV_LOCKIBASE_SVC_GET_ENV_MSGIBASE_SVC_USER_DBPATHIBASE_SVC_SVR_DB_INFOIBASE_SVC_GET_USERS- Options to ibase_server_info()
