<?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 — 新建大对象
说明
pg_lo_create() 新建大对象并返回大对象的 oid。不支持 PostgreSQL
访问模式 INV_READ、INV_WRITE 和
INV_ARCHIVE，创建的对象始终以读写方式访问。INV_ARCHIVE 已经从 PostgreSQL（6.3 及以上版本）中移除。
要使用大对象接口，必须将其封装在一个事务块中。
不使用大对象接口（没有访问控制，使用起来很麻烦），试试 PostgreSQL 的 bytea 列类型和 pg_escape_bytea()。
注意:
本函数以前的名字为 pg_locreate()。
参数
-
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().警告As of PHP 8.1.0, using the default connection is deprecated.
-
object_id -
如果指定
object_id，该函数将尝试使用此 id 创建大对象，否则服务器将分配一个空闲对象 id。该参数依赖于 PostgreSQL 8.1 中首次出现的功能。
返回值
大对象 OID， 或者在失败时返回 false。
更新日志
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 connection 参数接受 PgSql\Connection
实例，之前接受 resource。
|
示例
示例 #1 pg_lo_create() 示例
<?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
