Copyright 1997-2008 the PHP Documentation Group.
PDO_MYSQL is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to MySQL 3.x, 4.x and 5.x databases.
PDO_MYSQL will take advantage of native prepared statement support present in MySQL 4.1 and higher. If you're using an older version of the mysql client libraries, PDO will emulate them for you.
Beware: Some MySQL table types (storage engines) do not support transactions. When writing transactional database code using a table type that does not support transactions, MySQL will pretend that a transaction was initiated successfully. In addition, any DDL queries issued will implicitly commit any pending transactions.
The constants below are defined by
this driver, and will only be available when the extension has been either
compiled into PHP or dynamically loaded at runtime. In addition, these
driver-specific constants should only be used if you are using this driver.
Using driver-specific attributes with another driver may result in
unexpected behaviour. PDO::getAttribute
may be used to
obtain the PDO_ATTR_DRIVER_NAME
attribute to check the
driver, if your code can run against multiple drivers.
PDO::MYSQL_ATTR_USE_BUFFERED_QUERY
(integer)
If this attribute is set to TRUE
on a
PDOStatement
, the MySQL driver will use the
buffered versions of the MySQL API. If you're writing portable code, you
should use PDOStatement::fetchAll
instead.
Example 20.203. Forcing queries to be buffered in mysql
<?php if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') { $stmt = $db->prepare('select * from foo', array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true)); } else { die("my application only works with mysql; I should use \$stmt->fetchAll() instead"); } ?>
PDO::MYSQL_ATTR_LOCAL_INFILE
(integer)
Enable LOAD LOCAL INFILE
.
PDO::MYSQL_ATTR_INIT_COMMAND
(integer)
Command to execute when connecting to the MySQL server. Will automatically be re-executed when reconnecting.
PDO::MYSQL_ATTR_READ_DEFAULT_FILE
(integer)
Read options from the named option file instead of from
my.cnf
. This option is not available if
mysqlnd is used, because mysqlnd does not read the mysql
configuration files.
PDO::MYSQL_ATTR_READ_DEFAULT_GROUP
(integer)
Read options from the named group from
my.cnf
or the file specified with
MYSQL_READ_DEFAULT_FILE
. This option is not available if mysqlnd is used, because
mysqlnd does not read the mysql configuration files.
PDO::MYSQL_ATTR_MAX_BUFFER_SIZE
(integer)
Maximum buffer size. Defaults to 1 MiB.
PDO::MYSQL_ATTR_DIRECT_QUERY
(integer)
Perform direct queries, don't use prepared statements.
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