pg_result_seek() sets the internal row offset in a result resource.
// Connect to the database
$conn = pg_pconnect("dbname=publisher");
// Execute a query
$result = pg_query($conn, "SELECT author, email FROM authors");
// Seek to the 3rd row (assuming there are 3 rows)
// Fetch the 3rd row
$row = pg_fetch_row($result);