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<h1 class="refname">pg_lo_export</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">pg_lo_export</span> — <span class="dc-title">Export a large object to file</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.pg-lo-export-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>pg_lo_export</strong></span>
([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
], <span class="methodparam"><span class="type">int</span> <code class="parameter">$oid</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$pathname</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>pg_lo_export()</strong></span> takes a large object in a
PostgreSQL database and saves its contents to a file on the local
filesystem.
</p>
<p class="para">
To use the large object interface, it is necessary to
enclose it within a transaction block.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
This function used to be called <span class="function"><strong>pg_loexport()</strong></span>.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.pg-lo-export-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">connection</code></em></span>
<dd>
<p class="para">
PostgreSQL database connection resource. When
<em><code class="parameter">connection</code></em> is not present, the default connection
is used. The default connection is the last connection made by
<span class="function"><a href="function.pg-connect.html" class="function">pg_connect()</a></span> or <span class="function"><a href="function.pg-pconnect.html" class="function">pg_pconnect()</a></span>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">oid</code></em></span>
<dd>
<p class="para">
The <var class="varname"><var class="varname">OID</var></var> of the large object in the database.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">pathname</code></em></span>
<dd>
<p class="para">
The full path and file name of the file in which to write the
large object on the client filesystem.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.pg-lo-export-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-function.pg-lo-export-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2090">
<p><strong>Example #1 <span class="function"><strong>pg_lo_export()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /> $database </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=jacarta"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #DD0000">"begin"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$oid </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_lo_create</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$handle </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_lo_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #0000BB">$oid</span><span style="color: #007700">, </span><span style="color: #DD0000">"w"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_lo_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$handle</span><span style="color: #007700">, </span><span style="color: #DD0000">"large object data"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_lo_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$handle</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_lo_export</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #0000BB">$oid</span><span style="color: #007700">, </span><span style="color: #DD0000">'/tmp/lob.dat'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #DD0000">"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-function.pg-lo-export-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.pg-lo-import.html" class="function" rel="rdfs-seeAlso">pg_lo_import()</a> - Import a large object from file</span></li>
</ul>
</p>
</div>
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