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pg_loopen
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pg_loopen

Name

pg_loopen — Opens a large object descriptor.

Synopsis

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

Returns

File descriptor

Description

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

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">";
    $rowcount++;    
}
/* source of image.php 
$db = pg_pconnect("dbname=test user=postgres");
pg_exec($db,"begin");
$fhandle = pg_loopen($db,$photo,"r");
header("Content-type: image/gif");
pg_loreadall($fhandle);
pg_loclose($fd);
pg_exec($db,"commit");
*/

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