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# db2_connect

(PECL)

db2_connect -- Returns a connection to a database

## 説明

resource db2_connect ( string database, string username, string password [, array options] )

Creates a new connection to an IBM DB2 Universal Database, IBM Cloudscape, or Apache Derby database.

## パラメータ

database

  For a cataloged connection to a database, database represents the database alias in the DB2 client catalog.

  For an uncataloged connection to a database, database represents a complete connection string in the following format: DRIVER={IBM DB2 ODBC DRIVER};DATABASE=database;HOSTNAME=hostname;PORT=port;PROTOCOL=TCPIP;UID=username;PWD=password; where the parameters represent the following values:

  database

    The name of the database.

  hostname

    The hostname or IP address of the database server.

  port

    The TCP/IP port on which the database is listening for requests.

  username

    The username with which you are connecting to the database.

  password

    The password with which you are connecting to the database.

username

  The username with which you are connecting to the database.

  For uncataloged connections, you must pass a `NULL` value or empty string.

password

  The password with which you are connecting to the database.

  For uncataloged connections, you must pass a `NULL` value or empty string.

options

  An associative array of connection options that affect the behavior of the connection, where valid array keys include:

  autocommit

    Passing the DB2_AUTOCOMMIT_ON value turns autocommit on for this connection handle.

    Passing the DB2_AUTOCOMMIT_OFF value turns autocommit off for this connection handle.

## 返り値

Returns a connection handle resource if the connection attempt is successful. If the connection attempt fails, db2_connect() returns `FALSE`.

## 例

例 1. Creating a cataloged connection

Cataloged connections require you to have previously cataloged the target database through the DB2 Command Line Processor (CLP) or DB2 Configuration Assistant.

`<?php $database = 'SAMPLE'; $user = 'db2inst1'; $password = 'ibmdb2'; $conn = db2_connect($database, $user, $password); if ($conn) { echo "Connection succeeded."; db2_close($conn); } else { echo "Connection failed."; } ?>`

上の例の出力は以下となります。

    Connection succeeded.

例 2. Creating an uncataloged connection

An uncataloged connection enables you to dynamically connect to a database.

`<?php $database = 'SAMPLE'; $user = 'db2inst1'; $password = 'ibmdb2'; $hostname = 'localhost'; $port = 50000; $conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;" . "HOSTNAME=$hostname;PORT=$port;PROTOCOL=TCPIP;UID=$user;PWD=$password;"; $conn = db2_connect($conn_string, '', ''); if ($conn) { echo "Connection succeeded."; db2_close($conn); } else { echo "Connection failed."; } ?>`

上の例の出力は以下となります。

    Connection succeeded.

例 3. Creating a connection with autocommit off by default

Passing an array of options to db2_connect() enables you to modify the default behavior of the connection handle.

`<?php $database = 'SAMPLE'; $user = 'db2inst1'; $password = 'ibmdb2'; $options = array('autocommit' => DB2_AUTOCOMMIT_OFF); $conn = db2_connect($database, $user, $password, $options); if ($conn) { echo "Connection succeeded.\n"; if (db2_autocommit($conn)) { echo "Autocommit is on.\n"; } else { echo "Autocommit is off.\n"; } db2_close($conn); } else { echo "Connection failed."; } ?>`

上の例の出力は以下となります。

    Connection succeeded.
    Autocommit is off.

## 参考

db2_close()
db2_pconnect()

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