Export a large object to file

pg_lo_create
pg_lo_import
PostgreSQL Functions
PHP Manual

# pg_lo_export

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_export — Export a large object to file

### Description

bool pg_lo_export ([ resource `$connection` ], int `$oid` , string `$pathname` )

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.

> Note: This function used to be called pg_loexport().

### Parameters

`connection`

  PostgreSQL database connection resource. When `connection` is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

`oid`

  The OID of the large object in the database.

`pathname`

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

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 pg_lo_export() example

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

### See Also

- pg_lo_import() - Import a large object from file

pg_lo_create
pg_lo_import
PostgreSQL Functions
PHP Manual