<?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();
?>
pg_lo_create
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_lo_create — Create a large object
Description
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 -
An PgSql\Connection instance. When
connectionis unspecified, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().WarningAs of PHP 8.1.0, using the default connection is deprecated.
-
object_id -
If an
object_idis 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.
Return Values
A large object OID, or false on failure.
Changelog
| Version | Description |
|---|---|
| 8.1.0 |
The connection parameter expects an PgSql\Connection
instance now; previously, a resource was expected.
|
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");
?>
add a note
User Contributed Notes 1 note
andrea dot galli at acotel dot com ¶
21 years ago
