PHP 8.3.4 Released!

pg_lo_open

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

pg_lo_openOpen a large object

Descripción

pg_lo_open(PgSql\Connection $connection, int $oid, string $mode): PgSql\Lob|false

pg_lo_open() opens a large object in the database and returns an PgSql\Lob instance so that it can be manipulated.

Advertencia

Do not close the database connection before closing the PgSql\Lob instance.

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

Nota:

This function used to be called pg_loopen().

Parámetros

connection

An PgSql\Connection instance. When connection is unspecified, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

Advertencia

As of PHP 8.1.0, using the default connection is deprecated.

oid

The OID of the large object in the database.

mode

Can be either "r" for read-only, "w" for write only or "rw" for read and write.

Valores devueltos

An PgSql\Lob instance, o false en caso de error.

Historial de cambios

Versión Descripción
8.1.0 Returns an PgSql\Lob instance now; previously, a recurso was returned.
8.1.0 The connection parameter expects an PgSql\Connection instance now; previously, a recurso was expected.

Ejemplos

Ejemplo #1 pg_lo_open() 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");
?>

Ver también

add a note

User Contributed Notes 1 note

up
1
metator at netcabo dot pt
18 years ago
Just for the record, a user must be a superuser (database owner) in order to invoke pg_lo_open() (though pg_lo_create() may be invoked...). This opens a gigantic security hole in the db. If a user is not a superuser, db will raise an error with message "Can't create Large Object.".
Thus, imho, one should use pg_escape_bytea() instead.
To Top