(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_lo_exportExport a large object to file


pg_lo_export(PgSql\Connection $connection = ?, int $oid, string $pathname): bool

pg_lo_export() takes a large object in a PostgreSQL database and saves its contents to a file on the local filesystem.

To use the large object interface, it is necessary to enclose it within a transaction block.


This function used to be called pg_loexport().



An PgSql\Connection instance. When connection is unspecified, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().


As of PHP 8.1.0, using the default connection is deprecated.


The OID of the large object in the database.


The full path and file name of the file in which to write the large object on the client filesystem.

Valores devueltos

Devuelve true en caso de éxito o false en caso de error.

Historial de cambios

Versión Descripción
8.1.0 The connection parameter expects an PgSql\Connection instance now; previously, a recurso was expected.


Ejemplo #1 pg_lo_export() example

= pg_connect("dbname=jacarta");
pg_query($database, "begin");
$oid = pg_lo_create($database);
$handle = pg_lo_open($database, $oid, "w");
pg_lo_write($handle, "large object data");
pg_lo_export($database, $oid, '/tmp/lob.dat');
pg_query($database, "commit");

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