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(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
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。
注意:
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。
示例 #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");
?>
