pg_lo_import
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)
pg_lo_open — Open a large object
Description
resource pg_lo_open
( resource
$connection
, int $oid
, string $mode
)pg_lo_open() opens a large object in the database and returns large object resource so that it can be manipulated.
Warning
Do not close the database connection before closing the large object resource.
To use the large object interface, it is necessary to enclose it within a transaction block.
Note:
This function used to be called pg_loopen().
Parameters
-
connection -
PostgreSQL database connection resource. When
connectionis not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect(). -
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.
Return Values
A large object resource or FALSE on error.
Examples
Example #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
pg_lo_open - [2 notes]
metator at netcabo dot pt ¶
7 years ago
riccardo_ridenti at hotmail dot com ¶
10 years ago
//INSERT FILE INTO DB
$fp = fopen($filename,"r");
$buffer = fread($fp,filesize($filename));
fclose($fp);
pg_query ($conn, "begin");
$oid = pg_lo_create ($conn);
//echo "$oid\n";
$rs = pg_exec($conn,"insert into table(object) values($oid);");//object field type must be "oid"
$handle = pg_lo_open ($conn, $oid, "w");
//echo "$handle\n";
pg_lo_write ($handle, $buffer);
pg_lo_close ($handle);
pg_query ($conn, "commit"); //OR END
pg_close();
//GET BUFFER(file) FROM DB
$rs = pg_exec($conn,"select object from objects where id = xxxxxx;");
$row = pg_fetch_row($rs,0);
pg_query ($conn, "begin");
$loid = pg_lo_open($conn,$row[0], "r");
pg_lo_read_all ($loid);
pg_lo_close ($loid);
pg_query ($conn, "commit"); //OR END
pg_close();