NYCPHP Meetup

[Michael B Allen]

On Fri, 6 Apr 2007 09:58:48 -0400
"Alex C" <alexchan.1976 at gmail.com> wrote:

> Hi All,
> 
> I would like to know what would be the best way to do paged search
> results for LDAP. Is it even possible to do it similiar to mysql limit
> offset  functionality? Or should i do it via PHP.  However, I do know
> LDAP has pagedSearch control.  i don't know how or if i need to invoke
> it via php.

The below code demonstrates how to use the pagedResultsControl. The PHP
LDAP API is somewhat course but it should work.

Mike

$continue = true;
while ($continue) {
    $paged_control = array(
                        array(
                            'oid' => PAGED_CONTROL_OID,
                            'iscritical' => true,
                            'value' => ldap_ber_printf ('{iO}',
                                                        PAGE_SIZE, $cookie)
                        )
                     );
    if (!ldap_set_option($l, LDAP_OPT_SERVER_CONTROLS, $paged_control)) {
        echo "Not OK: ldap_set_option (controls)\n";
        exit;
    }     

    $sr = ldap_search($l, $query, $query_filter, $query_attribs, 0, 0, 0,
                      LDAP_DEREF_NEVER);

    if ($sr === FALSE) {
        echo "Not OK: ldap_search\n";
        exit;
    } 

    if (!ldap_parse_result ($l, $sr, &$errcode, &$matcheddn, &$errmsg,
                            &$referrals, &$serverctrls)) {
        echo "Not OK: ldap_parse_result\n";
        exit;
    }

    $paged_control_found = FALSE;
    if (isset($serverctrls)) {
        foreach ($serverctrls as $i) {
            if ($i['oid'] == PAGED_CONTROL_OID) {
                ldap_ber_scanf($i['value'], '{iO}', &$pagesize, &$cookie);
                $paged_control_found = TRUE;
                break;
            }
        }
    }
    if (!$paged_control_found) {
        echo "Not OK: paged control not found in response \n";
        exit;
    }

    // process entries as usual here ...

    if ($cookie == '') {
        $continue = false;
    }
}

-- 
Michael B Allen
PHP Active Directory Kerberos SSO
http://www.ioplex.com/