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PhpDig is a PHP MySQL based
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pg_loopen — Opens a large object descriptor.


int pg_loopen(conn, oid, mode);
int conn: Connection ID
int oid: Object identifier
string mode: Object mode


File descriptor


Opens an inversion large object using an object identifier (OID) from pg_locreate() or from an existing record on a specified database connection, and returns a file descriptor. The file descriptor can then be passed to other functions for manipulation. The mode is 'r' (read), 'w' (write), or 'rw' (read and write).


Example 1047. Open large object file

$db = pg_connect("host=dbserver dbname=db user=dbuser password=dbpasswd") or die ("Unable to connect");
$sql = "SELECT first_name, last_name, photo FROM employees";
$result = pg_exec($db, $sql);
$rowcount = 0;
while (list($first, $last, $photo) = @pg_fetch_array($result, $rowcount)) {
    echo "<img src="image.php?photo=$photo">";
/* source of image.php 
$db = pg_pconnect("dbname=test user=postgres");
$fhandle = pg_loopen($db,$photo,"r");
header("Content-type: image/gif");

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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