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<title>Deletes the large object</title>
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<h1 class="refname">PDO::pgsqlLOBUnlink</h1>
<p class="verinfo">(PHP 5 >= 5.1.2, PECL pdo_pgsql >= 1.0.2)</p><p class="refpurpose"><span class="refname">PDO::pgsqlLOBUnlink</span> — <span class="dc-title">Deletes the large object</span></p>
</div>
<div class="refsect1 description" id="refsect1-pdo.pgsqllobunlink-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><strong>PDO::pgsqlLOBUnlink</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$oid</code></span>
)</div>
<p class="para rdfs-comment">
Deletes a large object from the database identified by OID.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
This function must be called within a transaction.
</span>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-pdo.pgsqllobunlink-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">oid</code></em></span>
<dd>
<p class="para">
A large object identifier
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-pdo.pgsqllobunlink-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-pdo.pgsqllobunlink-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-988">
<p><strong>Example #1 A <span class="function"><strong>PDO::pgsqlLOBUnlink()</strong></span> example</strong></p>
<div class="example-contents"><p>
This example unlinks a large object from the database prior to deleting
the row that references it from the blobs table we've been using in
our <span class="function"><a href="pdo.pgsqllobcreate.html" class="function">PDO::pgsqlLOBCreate()</a></span> and
<span class="function"><a href="pdo.pgsqllobopen.html" class="function">PDO::pgsqlLOBOpen()</a></span> examples.
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$db </span><span style="color: #007700">= new </span><span style="color: #0000BB">PDO</span><span style="color: #007700">(</span><span style="color: #DD0000">'pgsql:dbname=test host=localhost'</span><span style="color: #007700">, </span><span style="color: #0000BB">$user</span><span style="color: #007700">, </span><span style="color: #0000BB">$pass</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">setAttribute</span><span style="color: #007700">(</span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">ATTR_ERRMODE</span><span style="color: #007700">, </span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">ERRMODE_EXCEPTION</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">beginTransaction</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">pgsqlLOBUnlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$oid</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"DELETE FROM BLOBS where ident = ?"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">(array(</span><span style="color: #0000BB">$some_id</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">$db</span><span style="color: #007700">-></span><span style="color: #0000BB">commit</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-pdo.pgsqllobunlink-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="pdo.pgsqllobopen.html" class="function" rel="rdfs-seeAlso">PDO::pgsqlLOBOpen()</a> - Opens an existing large object stream</span></li>
<li class="member"> <span class="function"><a href="pdo.pgsqllobcreate.html" class="function" rel="rdfs-seeAlso">PDO::pgsqlLOBCreate()</a> - Creates a new large object</span></li>
</ul>
</p>
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