PHP: pg_lo_export - Manual

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Last updated: Sat, 27 Jan 2007

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# pg_lo_export

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_export -- Export a large object to file

## Описание

bool pg_lo_export ( resource connection, int oid, string pathname )
bool pg_lo_export ( 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.

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

## Список параметров

`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.

## Возвращаемые значения

Возвращает `TRUE` в случае успешного завершения или `FALSE` в случае возникновения ошибки.

## Примеры

Пример 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");
?>`

## Смотрите также

pg_lo_import()

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Last updated: Sat, 27 Jan 2007
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