PHP 3.0.12
Apache 1.3.9
Netscape LDAP 4.11
Solaris 2.6

ldap_get_entries() returns false when only retrieving DN. It will also fail
if requesting attributes whose values are all empty.

-- Sometimes OK (CN & DN) --

$ld = ldap_connect("ldap.foobar.com", 389);

$base = "o=Foobar,c=US";
$attrs = array("cn");
$filter = "(uid=testuser)";

$sr = ldap_search($ld, $base, $filter, $attrs);
$info = ldap_get_entries($ld, $sr);

// OK as long as "cn" contains a value; otherwise $info is empty
echo $info[0]["dn"]."<br>";
echo $info[0]["cn"][0]."<br>";

ldap_unbind($ld);

-- Always Fails (DN only) --

$ld = ldap_connect("ldap.foobar.com", 389);

$base = "o=Foobar,c=US";
$attrs = array("dn");
$filter = "(uid=testuser)";

$sr = ldap_search($ld, $base, $filter, $attrs);
$info = ldap_get_entries($ld, $sr);

// fails; $info is always empty
echo $info[0]["dn"]."<br>";

ldap_unbind($ld);