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<h1 class="refname">pg_last_oid</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">pg_last_oid</span> — <span class="dc-title">Returns the last row's OID</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.pg-last-oid-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>pg_last_oid</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>pg_last_oid()</strong></span> is used to retrieve the
<var class="varname"><var class="varname">OID</var></var> assigned to an inserted row.
</p>
<p class="para">
OID field became an optional field from PostgreSQL 7.2 and will
not be present by default in PostgreSQL 8.1. When the
OID field is not present in a table, the programmer must use
<span class="function"><a href="function.pg-result-status.html" class="function">pg_result_status()</a></span> to check for successful
insertion.
</p>
<p class="para">
To get the value of a <em>SERIAL</em> field in an inserted
row, it is necessary to use the PostgreSQL <em>CURRVAL</em>
function, naming the sequence whose last value is required. If the
name of the sequence is unknown, the <em>pg_get_serial_sequence</em>
PostgreSQL 8.0 function is necessary.
</p>
<p class="para">
PostgreSQL 8.1 has a function <em>LASTVAL</em> that returns
the value of the most recently used sequence in the session. This avoids
the need for naming the sequence, table or column altogether.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
This function used to be called <span class="function"><strong>pg_getlastoid()</strong></span>.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.pg-last-oid-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">result</code></em></span>
<dd>
<p class="para">
PostgreSQL query result resource, returned by <span class="function"><a href="function.pg-query.html" class="function">pg_query()</a></span>,
<span class="function"><a href="function.pg-query-params.html" class="function">pg_query_params()</a></span> or <span class="function"><a href="function.pg-execute.html" class="function">pg_execute()</a></span>
(among others).
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.pg-last-oid-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A <span class="type"><a href="language.types.string.html" class="type string">string</a></span> containing the OID assigned to the most recently inserted
row in the specified <em><code class="parameter">connection</code></em>, or <strong><code>FALSE</code></strong> on error or
no available OID.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.pg-last-oid-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2087">
<p><strong>Example #1 <span class="function"><strong>pg_last_oid()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /> $pgsql_conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=mark host=localhost"</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #0000BB">$res1 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"CREATE TABLE test (a INTEGER) WITH OIDS"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">$res2 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO test VALUES (1)"</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #0000BB">$oid </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_last_oid</span><span style="color: #007700">(</span><span style="color: #0000BB">$res2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.pg-last-oid-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.pg-query.html" class="function" rel="rdfs-seeAlso">pg_query()</a> - Execute a query</span></li>
<li class="member"> <span class="function"><a href="function.pg-result-status.html" class="function" rel="rdfs-seeAlso">pg_result_status()</a> - Get status of query result</span></li>
</ul>
</p>
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