PDO::setAttribute

Descrizione

Sets an attribute on the database handle. Some available generic attributes are listed below; some drivers may make use of additional driver specific attributes. Note that driver specific attributes must not be used with other drivers.

PDO::ATTR_CASE

Force column names to a specific case. Can take one of the following values:

PDO::CASE_LOWER

Force column names to lower case.

PDO::CASE_NATURAL

Leave column names as returned by the database driver.

PDO::CASE_UPPER

Force column names to upper case.

PDO::ATTR_ERRMODE

Error reporting mode of PDO. Can take one of the following values:

PDO::ERRMODE_SILENT

Only sets error codes.

PDO::ERRMODE_WARNING

Raises E_WARNING diagnostics.

PDO::ERRMODE_EXCEPTION

Throws PDOExceptions.

PDO::ATTR_ORACLE_NULLS

Nota: This attribute is available with all drivers, not just Oracle.

Determines if and how null and empty strings should be converted. Can take one of the following values:

PDO::NULL_NATURAL

No conversion takes place.

PDO::NULL_EMPTY_STRING

Empty strings get converted to null.

PDO::NULL_TO_STRING

null gets converted to an empty string.

PDO::ATTR_STRINGIFY_FETCHES

Controls whether fetched values (except null) are converted to strings. Takes a value of type bool: true to enable and false to disable (default). null values remain unchanged unless PDO::ATTR_ORACLE_NULLS is set to PDO::NULL_TO_STRING.

PDO::ATTR_STATEMENT_CLASS

Set user-supplied statement class derived from PDOStatement. Requires array(string classname, array(mixed constructor_args)).

Attenzione

Cannot be used with persistent PDO instances.

PDO::ATTR_TIMEOUT

Specifies the timeout duration in seconds. Takes a value of type int.

Nota:

Not all drivers support this option, and its meaning may differ from driver to driver. For example, SQLite will wait for up to this time value before giving up on obtaining a writable lock, but other drivers may interpret this as a connection or a read timeout interval.

PDO::ATTR_AUTOCOMMIT

Nota: Only available for the OCI, Firebird, and MySQL drivers.

Whether to autocommit every single statement. Takes a value of type bool: true to enable and false to disable. By default, true.

PDO::ATTR_EMULATE_PREPARES

Nota: Only available for the OCI, Firebird, and MySQL drivers.

Whether enable or disable emulation of prepared statements. Some drivers do not support prepared statements natively or have limited support for them. If set to true PDO will always emulate prepared statements, otherwise PDO will attempt to use native prepared statements. In case the driver cannot successfully prepare the current query, PDO will always fall back to emulating the prepared statement.

PDO::MYSQL_ATTR_USE_BUFFERED_QUERY

Nota: Only available for the MySQL driver.

Whether to use buffered queries. Takes a value of type bool: true to enable and false to disable. By default, true.

PDO::ATTR_DEFAULT_FETCH_MODE

Set the default fetch mode. A description of the modes and how to use them is available in the PDOStatement::fetch() documentation.