(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_lo_import — 将文件导入为大型对象
pg_lo_import() creates a new large object in the database using a file on the filesystem as its data source.
要使用大型对象（lo）接口，需要将其放置在事务块中。
Note: 当启用 安全模式时， PHP 会检查被操作的文件或目录是否与被执行的脚本有相同的 UID（所有者）。
Note:
本函数以前的名字为 pg_loimport()。
connection
PostgreSQL database connection resource. When
connection is not present, the default connection
is used. The default connection is the last connection made by
pg_connect() or pg_pconnect().
pathname变量指明了要导入为大型对象的文件名。
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
was added in PHP 5.3 and relies on functionality that first
appeared in PostgreSQL 8.1.
导入成功则返回新建的大型对象的 OID，如果出错则返回 FALSE。
| 版本 | 说明 |
|---|---|
| 5.3.0 |
The optional |
| 4.2.0 | 在 PHP 4.2.0 版本之前，本函数语法不一样，见如下定义：
pg_lo_import
( string
$pathname
[, resource $connection
] ) : int |
Example #1 pg_lo_import() 例子
<?php
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$oid = pg_lo_import($database, '/tmp/lob.dat');
pg_query($database, "commit");
?>
its not very clear if pg_lo_import needs to have pg_lo_open called first. Because pg_lo_import handles the process of writign to the file, it seems logical that pg_lo_open does not need to be called. However due to the ugly nature of how postgres handles oid objects, it would be nice to have this documented.
Due to a bug, OLD API does not available with PHP 4.2.0 and 4.2.1.
PHP 4.2.2 will support OLD API again and will be kept long enough.
New API will be available PHP 4.2.0 to later versions.
Due to a bug, PHP 4.2.0 and 4.2.1 does not support pg_lo_import() old API. It's fixed in PHP 4.2.2.
BTW, new API will be always available from PHP 4.2.0 to later versions. Older API will be kept long enough, also.
it works for me (php-4.2.1)
not like this
int pg_lo_import ( string pathname [, resource connection])
but
int pg_lo_import ( resource connection, string pathname )
don't know the reason