Source of: /manual/en/pdo.lastinsertid.php
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<div id="pdo.lastinsertid" class="refentry">
<div class="refnamediv">
<h1 class="refname">PDO::lastInsertId</h1>
<p class="verinfo">(PHP 5 >= 5.1.0, PECL pdo >= 0.1.0)</p><p class="refpurpose"><span class="refname">PDO::lastInsertId</span> — <span class="dc-title">
Returns the ID of the last inserted row or sequence value
</span></p>
</div>
<a name="pdo.lastinsertid.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><b>PDO::lastInsertId</b></span>
([ <span class="methodparam"><span class="type">string</span> <tt class="parameter">$name</tt><span class="initializer"> = NULL</span></span>
] )</div>
<p class="para rdfs-comment">
Returns the ID of the last inserted row, or the last value from a
sequence object, depending on the underlying driver. For example,
<b>PDO_PGSQL()</b> requires you to specify the name of
a sequence object for the <i><tt class="parameter">name</tt></i>
parameter.
</p>
<blockquote><p><b class="note">Note</b>:
This method may not return a meaningful or consistent result across
different PDO drivers, because the underlying database may not even
support the notion of auto-increment fields or sequences.
<br />
</p></blockquote>
</div>
<a name="pdo.lastinsertid.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Parameters</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">name</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
Name of the sequence object from which the ID should be returned.
</p>
</dd>
</dl>
<p>
</p>
</div>
<a name="pdo.lastinsertid.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
If a sequence name was not specified for the <i><tt class="parameter">name</tt></i>
parameter, <b>PDO::lastInsertId()</b> returns a
string representing the row ID of the last row that was inserted into
the database.
</p>
<p class="para">
If a sequence name was specified for the <i><tt class="parameter">name</tt></i>
parameter, <b>PDO::lastInsertId()</b> returns a
string representing the last value retrieved from the specified sequence
object.
</p>
<p class="para">
If the PDO driver does not support this capability,
<b>PDO::lastInsertId()</b> triggers an
<i>IM001</i> SQLSTATE.
</p>
</div>
</div><?php manual_footer(); ?>
