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<title>Returns the ID of the last inserted row or sequence value</title>
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<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>
<div class="refsect1 description" id="refsect1-pdo.lastinsertid-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type">string</span> <span class="methodname"><strong>PDO::lastInsertId</strong></span>
([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$name</code><span class="initializer"> = <strong><code>NULL</code></strong></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,
<a href="ref.pdo-pgsql.html" class="link">PDO_PGSQL</a> requires you to specify the name of
a sequence object for the <em><code class="parameter">name</code></em> parameter.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
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.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-pdo.lastinsertid-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">name</code></em></span>
<dd>
<p class="para">
Name of the sequence object from which the ID should be returned.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-pdo.lastinsertid-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
If a sequence name was not specified for the <em><code class="parameter">name</code></em>
parameter, <span class="function"><strong>PDO::lastInsertId()</strong></span> 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 <em><code class="parameter">name</code></em>
parameter, <span class="function"><strong>PDO::lastInsertId()</strong></span> 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,
<span class="function"><strong>PDO::lastInsertId()</strong></span> triggers an
<em>IM001</em> SQLSTATE.
</p>
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