PDO_INFORMIX DSN
PDO_MYSQL DSN
PDO Treiber
PHP Manual

# MySQL Functions (PDO_MYSQL)

## Einführung

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.

Warnung

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.

## Vordefinierte Konstanten

Die folgenden Konstanten werden vom Treiber definiert und sind nur verfügbar, wenn die Extension entweder in PHP einkompiliert oder dynamisch zur Laufzeit geladen wurde. Weiterhin sind diese Konstanten treiberspezifisch und sollten nur mit diesem Treiber benutzt werden. MySQL-spezifische Attribute mit dem PostgreSQL Treiber zu nutzen, kann zu unerwarteten Ergebnissen führen. Kann Ihr Code mit verschiedenen Treibern arbeiten, so können Sie PDO::getAttribute() benutzen, um mit `PDO_ATTR_DRIVER_NAME` den aktuellen Treiber zu ermitteln.

`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.

  Beispiel #3 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.

## Inhaltsverzeichnis

- PDO_MYSQL DSN — Connecting to MySQL databases

PDO_INFORMIX DSN
PDO_MYSQL DSN
PDO Treiber
PHP Manual