Export a large object to file

# pg_lo_export

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

pg_lo_export — Export a large object to file

### Description

pg_lo_export(PgSql\Connection `$connection` = ?, int `$oid`, string `$filename`): 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.

> Note:

> This function used to be called pg_loexport().

### Parameters

`connection`

  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().

  Warning

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

`oid`

  The OID of the large object in the database.

`filename`

  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.

### Changelog

Version | Description
--- | ---
8.1.0 | The `connection` parameter expects an PgSql\Connection instance now; previously, a resource was expected.

### 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

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