PHP PDO 驱动 Constants

Constants

**Database and Statement Attributes Table**
Attribute	Valid value(s)
PDO_ATTR_AUTOCOMMIT	BOOL TRUE if autocommit is set, FALSE otherwise. dbh->auto_commit contains value. Processed by PDO directly.
PDO_ATTR_PREFETCH	LONG Value of the prefetch size in drivers that support it.
PDO_ATTR_TIMEOUT	LONG How long to wait for a db operation before timing out.
PDO_ATTR_ERRMODE	LONG Processed and handled by PDO
PDO_ATTR_SERVER_VERSION	STRING The human-readable string representing the Server/Version this driver is currently connected to.
PDO_ATTR_CLIENT_VERSION	STRING The human-readable string representing the Client/Version this driver supports.
PDO_ATTR_SERVER_INFO	STRING The human-readable description of the Server.
PDO_ATTR_CONNECTION_STATUS	LONG Values not yet defined
PDO_ATTR_CASE	LONG Processed and handled by PDO.
PDO_ATTR_CURSOR_NAME	STRING String representing the name for a database cursor for use in where current in <name> SQL statements.
PDO_ATTR_CURSOR	LONG PDO_CURSOR_FWDONLY Forward only cursor PDO_CURSOR_SCROLL Scrollable cursor

The values for the attributes above are all defined in terms of the Zend API. The Zend API contains macros that can be used to convert a *zval to a value. These macros are defined in the Zend header file, zend_API.h in the Zend directory of your PHP build directory. Some of these attributes can be used with the statement attribute handlers such as the PDO_ATTR_CURSOR and PDO_ATTR_CURSOR_NAME. See the statement attribute handling functions for more information.

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