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