Note that when you are using loops to search through attributes, you must
handle [dn] separately, otherwise each iteration of the loop will only
return each character of the dn, left to right, and  the array for dn of
"cn=boo" would be:
dn [0]="c"
dn [1]="n"
dn [2]="="
dn [3]="b"
dn [4]="o"
dn [5]="o"
Not too much fun to debug. ;-)

When authenticating to a Win2k LDAP server you must include the name of the
person authenticating to the server in the dn

i.e. cn=administrator, cn=users, dc=server, dc=domain, dc=country

Then when you bind to the LDAP database you use:

$res = ldap_bind($ldap, $dn, $password);

So a full example would be:

if (!($ldap = ldap_connect("<server>", <port>))) {
       die ("Could not connect to LDAP server");
}
$dn = "cn=administrator, cn=users, dc=myserver, dc=com, dc=au";
$password = "MyPassword";
if (!($res = @ldap_bind($ldap, $dn, $password))) {
       die ("Could not bind to $dn");
}

Then you do your list or search functions on the ldap database.

Watch out. some of these functions return misleading errors if you are not
bound to the ldap server. For example, ldap_errno will tell you that it
has been passed an invalid link identifier.

I have found this new site with a lot of information about LDAP:

Hi, 

There is a way to Access Active Directory : 
- You will have to bind as admin :
eg: [email protected] 
or as a user :
eg: [email protected] 
(because you can't search the Subtree as anonymous). 

Then you can query, add, delete and modify entries if you respect the
syntax of the MS schema.

F.B

Interoperability
Unix-PHP-LDAP based -> Active Directory (LDAP-server)

Well, We tried to use a superuser account but where are still not 
allowed to query important data like encrypted user passwords.

And that's because of the API Problem, as described above.

Right now I am working on a solution to use kerberos authentication 
to query the user against active directory.

For more Information about this try:


---------------------------------------
Solving this interoperability problem is still a big issue to many
developers.

J.J. Parree
Net communications GmbH
Cologne, Germany

When authenticating to a Win2k LDAP server, the name of the person must be
the FULL NAME in the dn 

NB : nothing is case sensitive !

$dn="cn=DUPOND John, cn=Users, dc=autourdupc, dc=com"
$password = "Password_of_DUPOND"; 

Then when you bind to the LDAP database you use: 

if (!($ldap = ldap_connect("<server>", <port>))) { 
die ("Could not connect to LDAP server"); 
} 
if (!($res = @ldap_bind($ldap, $dn, $password))) { 
die ("Could not bind to $dn"); 
} 

Hope this will usefull for everyone !

We have just reorganised our LDAP database to suit some of the responses
that Microsoft Outlook expects to receive.  As part of this I have
discovered that the names of the LDAP attributes returned have been
converted (by PHP I presume) to lower case.  This means that even though
the ldap attribute is "telephoneNumber", you must use
$info[0]["telephonenumber"][0] as
$info[$i]["telephoneNumber"][0] is not set.

Hope this helps someone :)

For those trying to do LDAP authentication with Lotus Domino NAB, the
following has worked for me (based on the win2k example by
[email protected]) :

$ip = "localhost";
$dn="CN=Joe Blo, O=myOrganization";
$password = "password"; 

if (!($ldap = ldap_connect($ip))) { 
	die ("Could not connect to LDAP server"); 
} 

print "connected to <b>$ip</b><br/>";

if (!($res = @ldap_bind($ldap, $dn, $password))) { 
	die ("Could not bind to $dn"); 
} 

print "user <b>$dn</b> authenticated.<br/>";

$sdn = "O=myOrganization";
$filter = "(objectclass=*)";

print "executing search...<b>DN: $sdn; Filter:
$filter</b><br/>";
$sr=ldap_search($ldap, $sdn, $filter);

$info = ldap_get_entries($ldap, $sr);

print $info["count"]." entries returned<hr>"; 
print "<PRE>";
print_r($info);
print "</PRE>";

There is an article about how to compile openldap on windows. Openldap
binaries are also available for download (for windows).

This worked for me:

function checkNTUser ($username,$password) {
	$ldapserver = 'Your Server';
	$ds=ldap_connect($ldapserver); 
	if ($ds) {
		$dn="cn=$username,cn=Users, DC=[sitename], DC=[sitesuffix]";
		$r=@ldap_bind($ds,$dn,$password);   
		if ($r) { return true;
		} else {
			return false;
		}
	}
}

When using PHP 4.2.1 with OpenLDAP 2.1.2 I was having problems with binding
to the ldap server.  I found that php was using an older protocol and
added the following to the slapd.conf:

allow bind_v2

See ``man slapd.conf'' for more info about the allow item in the
slapd.conf file, this is all I know! :)

Behind the scenes, PHP is known to compile with the Netscape/iPlanet SDK
and those from OpenLDAP. We have successfully gotten the 32-bit Netscape
LDAP SDK for C v4.14 to compile into PHP on numerous platforms, most often
on Sun Solaris 2.6-2.8. We have never gotten the 64-bit 4.14 version to
work properly (at least on Solaris) nor have we gotten the 5.x versions to
work with PHP. Honestly, we didn't try hard with the 5.x versions because
we knew we could get v4.14 to work.

For our configuration, we specify the exact installation path for the C
SDK in the --with-ldap option. I think the default goes to /usr/local/ldap
if unspecified but I never trust the defaults for MySQL or LDAP (no
offense to anyone).

This is some basic historical information for those of you that may be
struggling to get LDAP into you PHP compilations. I hope it sheds some
light!