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<!-- $Revision: 1.8 $ -->
  <refentry id="function.mysqli-insert-id">
   <refnamediv>
    <refname>mysqli_insert_id</refname>
    <refname>mysqli->insert_id</refname>
    <refpurpose>Returns the auto generated id used in the last query</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <para>Procedural style:</para>
     <methodsynopsis>
      <type>int</type><methodname>mysqli_insert_id</methodname>
      <methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
     </methodsynopsis>
     <para>Object oriented style (property):</para>
     <classsynopsis>
      <ooclass><classname>mysqli</classname></ooclass>
       <fieldsynopsis><type>int</type><varname>insert_id</varname></fieldsynopsis>
     </classsynopsis>
    <para>
     The <function>mysqli_insert_id</function> function returns the ID generated 
     by a query on a table with a column having the AUTO_INCREMENT attribute. If
     the last query wasn't an INSERT or UPDATE statement or if the modified table
     does not have a column with the AUTO_INCREMENT attribute, this function will
     return zero.
    </para>
    <note>
     <para>
      Performing an INSERT or UPDATE statement using the LAST_INSERT_ID()
      function will also modify the value returned by the
      <function>mysqli_insert_id</function> function.
     </para>
    </note>
   </refsect1>
   <refsect1>
    &reftitle.returnvalues;
    <para>
      The value of the <literal>AUTO_INCREMENT</literal> field that was updated 
      by the previous query. Returns zero if there was no previous query on the 
      connection or if the query did not update an <literal>AUTO_INCREMENT</literal>
      value. 
  </para>
  <note> 
   <para>
    If the number is greater than maximal int value, <function>mysqli_insert_id</function> 
    will return a string.
   </para>
  </note>
 </refsect1>
 <refsect1>
  &reftitle.examples;
  <example>
   <title>Object oriented style</title>
   <programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$mysqli->query("CREATE TABLE myCity LIKE City");

$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
$mysqli->query($query);

printf ("New Record has id %d.\n", $mysqli->insert_id);

/* drop table */
$mysqli->query("DROP TABLE myCity");

/* close connection */
$mysqli->close();
?>
]]>
  </programlisting>
  </example>
  <example>
   <title>Procedural style</title>
   <programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

mysqli_query($link, "CREATE TABLE myCity LIKE City");

$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
mysqli_query($link, $query);

printf ("New Record has id %d.\n", mysqli_insert_id($link));

/* drop table */
mysqli_query($link, "DROP TABLE myCity");

/* close connection */
mysqli_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs;
  <screen>
<![CDATA[
New Record has id 1.
]]>
  </screen>
 </refsect1>
</refentry>

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