pg_lo_export

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

pg_lo_export — Export a large object to file

Descrierea

pg_lo_export ([ resource $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.

Notă:

This function used to be called pg_loexport().

Parametri

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.

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului.

Exemple

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");
?>

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