PHP Manual: Create a large object

Description

int pg_lo_create ([ resource $connection [, mixed $object_id ]] )

int pg_lo_create ( mixed $object_id )

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.

Note:
This function used to be called pg_locreate.

Parameters

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.
object_id: If an object_id is given the function will try to create a large object with this id, else a free object id is assigned by the server. The parameter was added in PHP 5.3 and relies on functionality that first appeared in PostgreSQL 8.1.

Return Values

A large object OID or FALSE on error.

Changelog

Version	Description
5.3.0	The optional `object_id` was added.

Examples

Example #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");
?>