查询后如何对ldap结果进行排序

Question

i have a code where i want to sort ldap results by sn. But it's not working. What i am doing wrong? Thanks!

$att = array("company","samaccountname","ou","name","displayname", "sn", "givenname", "mail", "telephonenumber", "mobile","title","department");
$result=ldap_search($ldap_connection, $searchdn, $filter, $att);

$info = ldap_get_entries($ldap_connection, $result);

ksort($info['sn']);

for ($i=0; $i<$info["count"]; $i++)....

Answer 1

You can use PHP's client side ldap sort function:

// Search
$results = ldap_search($ldap_connection, $searchdn, $filter, $att);

// Sort -- attribute on which to sort needs to be included in $att array
ldap_sort($ldap_connection, $result, 'sn');

// Get data
$info = ldap_get_entries($ldap_connection, $result);

Answer 2

Use uasort for that like this:

uasort($info, function($a, $b) {
    return strnatcasecmp($a['sn'], $b['sn']);
}) ;

(not tested but should work)

Using ldap_sort is deprecated as the underlying C-Function is deprecated for some years now and the sorting algorithm is also not flexible. With this approach you get the same functionality but with much more flexibility. And as both only sort the returned resultset you are better off using that approach.