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PhpDig is a PHP MySQL based
Web Spider & Search Engine.



pg_locreate — Creates a large object identifier.


int pg_locreate(conn);
int conn: Connection ID


Object ID


Creates an inversion large object on the specified database connection. The object is created with both read and write access. The object identifier can be passed to other PostgreSQL large-object handling functions.

In postgreSQL, records containing data cannot span 'data pages' which have a maximum size of 8192 bytes. Data - including binary data, that cannot be accomodated within a normal record can be stored as a large object. The large object interface to postgreSQL is a file based mechanism and has a similar set of functions to normal file access functions. In some respects, it is analogous to the fopen() group functions in PHP.


Example 1044. Create a large object

if (isset($submit)) {
    $db = pg_connect("host=dbserver dbname=db user=dbuser password=dbpasswd") or die ("Unable to connect");
    $oid = pg_locreate($db);
    $fd = pg_loopen ($db, $oid, "w");
    pg_lowrite ($fd, $file);
    echo "Uploaded image with oid $oid";
    pg_loclose ($fd);   
} else {
    echo "<form enctype=\"multipart/form-data\">";
    echo "<input type=file name=file>";
    echo "<input type=submit name=submit value=UPLOAD>";
    echo "</form>";

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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