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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 317663 $ -->
<refentry xml:id="function.sqlsrv-connect" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>sqlsrv_connect</refname>
<refpurpose>Opens a connection to a Microsoft SQL Server database</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>sqlsrv_connect</methodname>
<methodparam><type>string</type><parameter>serverName</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter>connectionInfo</parameter></methodparam>
</methodsynopsis>
<para>
Opens a connection to a Microsoft SQL Server database. By default, the connection
is attempted using Windows Authentication. To connect using SQL Server
Authentication, include "UID" and "PWD" in the connection options array.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>serverName</parameter></term>
<listitem>
<para>
The name of the server to which a connection is established. To connect
to a specific instance, follow the server name with a forward slash
and the instance name (e.g. serverName\sqlexpress).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>connectionInfo</parameter></term>
<listitem>
<para>
An associative array that specifies options for connecting to the server.
If values for the UID and PWD keys are not specified, the connection
will be attempted using Windows Authentication. For a complete list of supported
keys, see <link xlink:href="&url.sqlsrv.connection.options;">SQLSRV Connection Options</link>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A connection resource. If a connection cannot be successfully opened, &false; is returned.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Connect using Windows Authentication.</title>
<programlisting role="php">
<![CDATA[
<?php
$serverName = "serverName\sqlexpress"; //serverName\instanceName
// Since UID and PWD are not specified in the $connectionInfo array,
// The connection will be attempted using Windows Authentication.
$connectionInfo = array( "Database"=>"dbName");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn ) {
echo "Connection established.<br />";
}else{
echo "Connection could not be established.<br />";
die( print_r( sqlsrv_errors(), true));
}
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title>Connect by specifying a user name and password.</title>
<programlisting role="php">
<![CDATA[
<?php
$serverName = "serverName\sqlexpress"; //serverName\instanceName
$connectionInfo = array( "Database"=>"dbName", "UID"=>"userName", "PWD"=>"password");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn ) {
echo "Connection established.<br />";
}else{
echo "Connection could not be established.<br />";
die( print_r( sqlsrv_errors(), true));
}
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title>Connect on a specifed port.</title>
<programlisting role="php">
<![CDATA[
<?php
$serverName = "serverName\sqlexpress, 1542"; //serverName\instanceName, portNumber (default is 1433)
$connectionInfo = array( "Database"=>"dbName", "UID"=>"userName", "PWD"=>"password");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn ) {
echo "Connection established.<br />";
}else{
echo "Connection could not be established.<br />";
die( print_r( sqlsrv_errors(), true));
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<para>
By default, the <function>sqlsrv_connect</function> uses connection pooling to
improve connection performance. To turn off connection pooling (i.e. force a
new connection on each call), set the "ConnectionPooling" option in the
$connectionOptions array to 0 (or &false;). For more information, see
<link xlink:href="&url.sqlsrv.connection.pooling;">SQLSRV Connection Pooling</link>.
</para>
<para>
The SQLSRV extension does not have a dedicated function for changing which
database is connected to. The target database is specified in the
$connectionOptions array that is passed to sqlsrv_connect. To change the
database on an open connection, execute the following query "USE dbName"
(e.g. sqlsrv_query($conn, "USE dbName")).
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>sqlsrv_close</function></member>
<member><function>sqlsrv_errors</function></member>
<member><function>sqlsrv_query</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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