PHP Openldap检索所有要求的属性，但“位置”

I'm making a sort of phone book and everything is fine:

• Connection and authentification works perfectly
• Research goes aswell
• I can modify user's attributes

Then my boss asked me to add the Location attribute aka "Bureau" in french but openldap won't retrive it and only it.

Here's the code :

$attributes = array();
$attributes[] = 'givenname';
$attributes[] = 'sn';
$attributes[] = 'samaccountname';
$attributes[] = 'mail';
$attributes[] = 'telephonenumber';
$attributes[] = 'useraccountcontrol';
$attributes[] = 'dn';
$attributes[] = 'location';

/*------------------------------------------------------------------------------*/
if ($ldap_bind) // Si la connexon s'est effectuée
{
    // Query sur LDAP
    $resultat = ldap_search($ldap_connect, $dn, $search_filter, $attributes) or die('Une erreur est survenue pendant la recherche.');

    // Transformation de l'objet LDAP en données explotables
    $entries = ldap_get_entries($ldap_connect, $resultat);

But when I var_dump($entries), the location attribute isn't in the array, like if the name attribute was wrong. But according to msdn it's the right attribute correctly spelled.

So now I turn myself to you in hope someone can help on this issue.

In LDAP, if the attribute is not set, it will not be retrieved empty but will not be set in the response entry array.

Retrieve every attribute of the entry and var_dump it to see if it is set.