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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.74 -->
<refentry id='function.pg-lo-tell'>
<refnamediv>
<refname>pg_lo_tell</refname>
<refpurpose>
Returns current seek position a of large object
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>pg_lo_tell</methodname>
<methodparam><type>resource</type><parameter>large_object</parameter></methodparam>
</methodsynopsis>
<para>
<function>pg_lo_tell</function> returns the current position (offset
from the beginning) of a large object.
</para>
<para>
To use the large object interface, it is necessary to
enclose it within a transaction block.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>large_object</parameter></term>
<listitem>
<para>
PostgreSQL large object (LOB) resource, returned by <function>pg_lo_open</function>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The current seek offset (in number of bytes) from the beginning of the large
object. If there is an error, the return value is negative.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_lo_tell</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$doc_oid = 189762345;
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$handle = pg_lo_open($database, $doc_oid, "r");
// Skip first 50000 bytes
pg_lo_seek($handle, 50000, PGSQL_SEEK_SET);
// See how far we've skipped
$offset = pg_lo_tell($handle);
echo "Seek position is: $offset";
pg_query($database, "commit");
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Seek position is: 50000
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_lo_seek</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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