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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 317663 $ -->
<refentry xml:id="function.sqlsrv-begin-transaction" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>sqlsrv_begin_transaction</refname>
<refpurpose>Begins a database transaction</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>sqlsrv_begin_transaction</methodname>
<methodparam><type>resource</type><parameter>conn</parameter></methodparam>
</methodsynopsis>
<para>
The transaction begun by <function>sqlsrv_begin_transaction</function> includes
all statements that were executed after the call to
<function>sqlsrv_begin_transaction</function> and before calls to
<function>sqlsrv_rollback</function> or <function>sqlsrv_commit</function>.
Explicit transactions should be started and committed or rolled back using
these functions instead of executing SQL statements that begin and committ/roll
back transactions. For more information, see
<link xlink:href="&url.sqlsrv.transaction.handling;">SQLSRV Transactions</link>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>conn</parameter></term>
<listitem>
<para>
The connection resource returned by a call to <function>sqlsrv_connect</function>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>sqlsrv_begin_transaction</function> example</title>
<para>
The following example demonstrates how to use
<function>sqlsrv_begin_transaction</function> together with
<function>sqlsrv_commit</function> and <function>sqlsrv_rollback</function>.
</para>
<programlisting role="php">
<![CDATA[
<?php
$serverName = "serverName\sqlexpress";
$connectionInfo = array( "Database"=>"dbName", "UID"=>"userName", "PWD"=>"password");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn === false ) {
die( print_r( sqlsrv_errors(), true ));
}
/* Begin the transaction. */
if ( sqlsrv_begin_transaction( $conn ) === false ) {
die( print_r( sqlsrv_errors(), true ));
}
/* Initialize parameter values. */
$orderId = 1; $qty = 10; $productId = 100;
/* Set up and execute the first query. */
$sql1 = "INSERT INTO OrdersTable (ID, Quantity, ProductID)
VALUES (?, ?, ?)";
$params1 = array( $orderId, $qty, $productId );
$stmt1 = sqlsrv_query( $conn, $sql1, $params1 );
/* Set up and execute the second query. */
$sql2 = "UPDATE InventoryTable
SET Quantity = (Quantity - ?)
WHERE ProductID = ?";
$params2 = array($qty, $productId);
$stmt2 = sqlsrv_query( $conn, $sql2, $params2 );
/* If both queries were successful, commit the transaction. */
/* Otherwise, rollback the transaction. */
if( $stmt1 && $stmt2 ) {
sqlsrv_commit( $conn );
echo "Transaction committed.<br />";
} else {
sqlsrv_rollback( $conn );
echo "Transaction rolled back.<br />";
}
?>
]]>
</programlisting>
&example.outputs.similar;
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>sqlsrv_commit</function></member>
<member><function>sqlsrv_rollback</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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