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.
pg_lo_open
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_lo_open — Open a large object
Descrição
pg_lo_open() opens a large object in the database and returns an PgSql\Lob instance so that it can be manipulated.
Aviso
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().
Parâmetros
-
connection -
Uma instância de PgSql\Connection. Quando o parâmetro
connectionnão for especificado, a conexão padrão será usada. A conexão padrão é a última conexão feita por pg_connect() ou pg_pconnect().AvisoA partir do PHP 8.1.0, usar a conexão padrão tornou-se defasado.
-
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.
Valor Retornado
An PgSql\Lob instance, ou false em caso de falha.
Registro de Alterações
| Versão | Descrição |
|---|---|
| 8.1.0 | Returns an PgSql\Lob instance now; previously, a resource was returned. |
| 8.1.0 |
O parâmetro connection agora espera uma instância de PgSql\Connection;
anteriormente, um resource era esperado.
|
Exemplos
Exemplo #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");
?>
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User Contributed Notes 1 note
metator at netcabo dot pt ¶
19 years ago
