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PDO::getAttribute

(PHP 5 >= 5.1.0, PECL pdo >= 0.2.0)

PDO::getAttribute — Retrieve a database connection attribute

说明

mixed PDO::getAttribute ( int $attribute )

This function returns the value of a database connection attribute. To retrieve PDOStatement attributes, refer to PDOStatement::getAttribute().

Note that some database/driver combinations may not support all of the database connection attributes.

参数

attribute

One of the PDO::ATTR_* constants. The constants that apply to database connections are as follows:

  • PDO::ATTR_AUTOCOMMIT
  • PDO::ATTR_CASE
  • PDO::ATTR_CLIENT_VERSION
  • PDO::ATTR_CONNECTION_STATUS
  • PDO::ATTR_DRIVER_NAME
  • PDO::ATTR_ERRMODE
  • PDO::ATTR_ORACLE_NULLS
  • PDO::ATTR_PERSISTENT
  • PDO::ATTR_PREFETCH
  • PDO::ATTR_SERVER_INFO
  • PDO::ATTR_SERVER_VERSION
  • PDO::ATTR_TIMEOUT

返回值

A successful call returns the value of the requested PDO attribute. An unsuccessful call returns null.

范例

Example #1 Retrieving database connection attributes

<?php
$conn = new PDO('odbc:sample', 'db2inst1', 'ibmdb2');
$attributes = array(
    "AUTOCOMMIT", "ERRMODE", "CASE", "CLIENT_VERSION", "CONNECTION_STATUS",
    "ORACLE_NULLS", "PERSISTENT", "PREFETCH", "SERVER_INFO", "SERVER_VERSION",
    "TIMEOUT"
);

foreach ($attributes as $val) {
    echo "PDO::ATTR_$val: ";
    echo $conn->getAttribute(constant("PDO::ATTR_$val")) . "\n";
}
?>

参见

PDO
在线手册：中文 英文
PHP手册
PHP手册 - N: Retrieve a database connection attribute

用户评论:

peter dot hopfgartner at r3-gis dot com (08-Sep-2009 09:44)

The Oracle driver seems to not support PDO::getAttribute():

ociPHP Fatal error:  Uncaught exception 'PDOException' with message 'SQLSTATE[IM001]: Driver does not support this function: driver does not support getting attributes' in ...

Tim (11-Jan-2007 04:20)

If you want to retreive the Database type connection you can use the constant:

ATTR_DRIVER_NAME

$pdo_connection->getAttribute(constant("PDO::ATTR_DRIVER_NAME"))

Although i do not know if all drivers support this contant