<?php
// $ds is a valid link identifier (see ldap_connect)
$dn = 'ou=example,dc=org';
$filter = '(|(sn=Doe*)(givenname=John*))';
$justthese = array('ou', 'sn', 'givenname', 'mail');
$sr = ldap_search($ds, $dn, $filter, $justthese);
// Sort
ldap_sort($ds, $sr, 'sn');
// Retrieving the data
$info = ldap_get_entries($ds, $sr);