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Last updated: Sat, 27 Jan 2007

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# pg_lo_create

(PHP 4 >= 4.2.0, PHP 5)

pg_lo_create -- Create a large object

## Описание

int pg_lo_create ( [resource connection] )

pg_lo_create() creates a large object and returns the `OID` of the large object. PostgreSQL access modes `INV_READ`, `INV_WRITE`, and `INV_ARCHIVE` are not supported, the object is created always with both read and write access. `INV_ARCHIVE` has been removed from PostgreSQL itself (version 6.3 and above).

To use the large object interface, it is necessary to enclose it within a transaction block.

Instead of using the large object interface (which has no access controls and is cumbersome to use), try PostgreSQL's `bytea` column type and pg_escape_bytea().

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

## 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().

## Возвращаемые значения

A large object `OID` or `FALSE` on error.

## Примеры

Пример 1. pg_lo_create() example

`<?php
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$oid = pg_lo_create($database);
echo "$oid\n";
$handle = pg_lo_open($database, $oid, "w");
echo "$handle\n";
pg_lo_write($handle, "large object data");
pg_lo_close($handle);
pg_query($database, "commit");
?>`

add a note User Contributed Notes
pg_lo_create
andrea dot galli at acotel dot com
05-May-2003 10:21
`<?php
// --------- OPEN CONN ---
$conn = pg_connect("host='127.0.0.1' dbname='test' user='usertest' password='passtest'");
// --------- OPEN FILE ---
$fp = fopen('logo.gif', "r");
$buffer = fread($fp, filesize('logo.gif'));
fclose($fp);
// --------- CREATE - INSERT OID ---
pg_exec($conn, "begin");
$oid = pg_locreate($conn);
$rs = pg_exec($conn,"INSERT INTO test(tipo, images) VALUES('A1', $oid);");
$handle = pg_loopen ($conn, $oid, "w");
pg_lowrite ($handle, $buffer);
pg_loclose ($handle);
pg_exec($conn, "commit");
// --------- OPEN - INSERT OID ---
$rs = pg_exec($conn, "SELECT images FROM test WHERE tipo = 'A1';");
$row = pg_fetch_row($rs, 0);
pg_exec($conn, "begin");
$loid = pg_loopen($conn, $row[0], "r");
header("Content-type: image/gif");
pg_loreadall($loid);
pg_loclose($loid);
pg_exec ($conn, "commit");
// --------- UNLINK OID ---
pg_exec($conn, "begin");
$loid = $row[0];
pg_lounlink($conn, $loid);
pg_exec ($conn, "commit");
// --------- DELETE OID ---
pg_exec($conn, "DELETE FROM test WHERE tipo = 'A1';");
// --------- CLOSE CONN ---
pg_close();
?>`
add a note
pg_lo_export pg_lo_close

Last updated: Sat, 27 Jan 2007
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