Fix doc bug #62503 (DDL statements in PDO queries are implicitly commited!).

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@326723 c90b9560-bf6c-de11-be94-00142212c4b1

reference/pdo/pdo/commit.xml

@@ -31,7 +31,41 @@
  <refsect1 role="examples">
   &reftitle.examples;
   <para>
-   <example><title>Commit a transaction</title>
+   <example>
+    <title>Committing a basic transaction</title>
+    <programlisting role="php">
+<![CDATA[
+<?php
+/* Begin a transaction, turning off autocommit */
+$dbh->beginTransaction();
+
+/* Insert multiple records on an all-or-nothing basis */
+$sql = 'INSERT INTO fruit
+    (name, colour, calories)
+    VALUES (?, ?, ?)';
+
+$sth = $dbh->prepare($sql);
+
+foreach ($fruits as $fruit) {
+    $sth->execute(array(
+        $fruit->name,
+        $fruit->colour,
+        $fruit->calories,
+    ));
+}
+
+/* Commit the changes */
+$dbh->commit();
+
+/* Database connection is now back in autocommit mode */
+?>
+]]>
+    </programlisting>
+   </example>
+  </para>
+  <para>
+   <example>
+    <title>Committing a DDL transaction</title>
     <programlisting role="php">
 <![CDATA[
 <?php
@@ -49,6 +83,14 @@ $dbh->commit();
 ]]>
     </programlisting>
    </example>
+   <note>
+    <simpara>
+     Not all databases will allow transactions to operate on DDL statements:
+     some will generate errors, whereas others (including MySQL) will
+     automatically commit the transaction after the first DDL statement has
+     been encountered.
+    </simpara>
+   </note>
   </para>
  </refsect1>