# PDO->getAttribute()

(PHP 5 >= 5.1.0, PECL pdo:0.2-1.0.3)

PDO->getAttribute() — Retrieve a database connection attribute

### Description

PDO
mixed 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.

### Parameters

`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

### Return Values

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

### Examples

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";
}
?>`

### See Also

- PDO->setAttribute()
- PDOStatement->getAttribute()
- PDOStatement->setAttribute()