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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.2 -->
<refentry xml:id="function.pg-lo-open" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_lo_open</refname>
<refpurpose>Open a large object</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>pg_lo_open</methodname>
<methodparam><type>resource</type><parameter>connection</parameter></methodparam>
<methodparam><type>int</type><parameter>oid</parameter></methodparam>
<methodparam><type>string</type><parameter>mode</parameter></methodparam>
</methodsynopsis>
<para>
<function>pg_lo_open</function> opens a large object in the database
and returns large object resource so that it can be manipulated.
</para>
<warning>
<para>
Do not close the database connection before closing the large
object resource.
</para>
</warning>
<para>
To use the large object interface, it is necessary to
enclose it within a transaction block.
</para>
<note>
<para>
This function used to be called <function>pg_loopen</function>.
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
<para>
PostgreSQL database connection resource. When
<parameter>connection</parameter> is not present, the default connection
is used. The default connection is the last connection made by
<function>pg_connect</function> or <function>pg_pconnect</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>oid</parameter></term>
<listitem>
<para>
The <varname>OID</varname> of the large object in the database.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>mode</parameter></term>
<listitem>
<para>
Can be either "r" for read-only, "w" for write only or "rw" for read and
write.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A large object resource or &false; on error.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_lo_open</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$oid = pg_lo_create($database);
echo "$oid\n";
$handle = pg_lo_open($database, $oid, "w");
echo "$handle\n";
pg_lo_write($handle, "large object data");
pg_lo_close($handle);
pg_query($database, "commit");
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_lo_close</function></member>
<member><function>pg_lo_create</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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