pg_lo_create

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_lo_createCreate a large object

Опис

pg_lo_create(PgSql\Connection $connection = ?, mixed $object_id = ?): int
pg_lo_create(mixed $object_id): int

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().

Зауваження:

This function used to be called pg_locreate().

Параметри

connection

Примірник PgSql\Connection. Якщо параметр connection не визначено, то виконується стандартне з'єднання, тобто останнє, виконане функцією pg_connect() або pg_pconnect().

Увага

Починаючи з PHP 8.1.0, використання стандартного з'єднання є застарілим.

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 relies on functionality that first appeared in PostgreSQL 8.1.

Значення, що повертаються

A large object OID, або false в разі помилки.

Журнал змін

Версія Опис
8.1.0 Тепер параметр connection має бути примірником PgSql\Connection. Раніше очікувався resource.

Приклади

Приклад #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");
?>