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    PDO::getAttribute

    (PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 0.2.0)

    PDO::getAttribute — Retrieve a database connection attribute

    Descrizione

    public PDO::getAttribute(int $attribute): mixed

    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.

    Elenco dei parametri

    attribute

    One of the PDO::ATTR_* constants. The generic attributes 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

    Some drivers may make use of additional driver specific attributes. Note that driver specific attributes must not be used with other drivers.

    Valori restituiti

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

    Errori/Eccezioni

    PDO::getAttribute() may throw a PDOException when the underlying driver does not support the requested attribute.

    Esempi

    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";
    }
    ?>

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    User Contributed Notes 2 notes

    up
    5
    Phil Hilton
    6 years ago
    Better example that handles unsupported attributes gracefully:

    <?php

    $conn     = new PDO( 'odbc:sample', 'db2inst1', 'ibmdb2' );
    $conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );

    $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: ";
    try {
    echo     $conn->getAttribute( constant( "PDO::ATTR_$val" ) ) . "\n";
    } catch (     PDOException $e ) {
    echo     $e->getMessage() . "\n";
    }
    }

    ?>
    up
    0
    Robert Parham
    9 years ago
    Oracle does not have the following attributes:

    PDO::ATTR_CONNECTION_STATUS: SQLSTATE[IM001]: Driver does not support this function: driver does not support that attribute
    PDO::ATTR_PREFETCH: SQLSTATE[IM001]: Driver does not support this function: driver does not support that attribute
    PDO::ATTR_TIMEOUT: SQLSTATE[IM001]: Driver does not support this function: driver does not support that attribute

    The rest work fine.
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