LXI. LDAP Functions


LDAP is the Lightweight Directory Access Protocol, and is a protocol used to access "Directory Servers". The Directory is a special kind of database that holds information in a tree structure.

The concept is similar to your hard disk directory structure, except that in this context, the root directory is "The world" and the first level subdirectories are "countries". Lower levels of the directory structure contain entries for companies, organisations or places, while yet lower still we find directory entries for people, and perhaps equipment or documents.

To refer to a file in a subdirectory on your hard disk, you might use something like:


The forwards slash marks each division in the reference, and the sequence is read from left to right.

The equivalent to the fully qualified file reference in LDAP is the "distinguished name", referred to simply as "dn". An example dn might be:

     cn=John Smith,ou=Accounts,o=My Company,c=US

The comma marks each division in the reference, and the sequence is read from right to left. You would read this dn as:

     country = US
     organization = My Company
     organizationalUnit = Accounts
     commonName = John Smith

In the same way as there are no hard rules about how you organise the directory structure of a hard disk, a directory server manager can set up any structure that is meaningful for the purpose. However, there are some conventions that are used. The message is that you can not write code to access a directory server unless you know something about its structure, any more than you can use a database without some knowledge of what is available.

Lots of information about LDAP can be found at

The Netscape SDK contains a helpful Programmer's Guide in HTML format.


You will need to get and compile LDAP client libraries from either OpenLDAP or Bind9.net in order to compile PHP with LDAP support.


LDAP support in PHP is not enabled by default. You will need to use the --with-ldap[=DIR] configuration option when compiling PHP to enable LDAP support. DIR is the LDAP base install directory. To enable SASL support, be sure --with-ldap-sasl[=DIR] is used, and that sasl.h exists on the system.

Note to Win32 Users: In order to enable this module on a Windows environment, you must copy several files from the DLL folder of the PHP/Win32 binary package to the SYSTEM folder of your windows machine. (Ex: C:\WINNT\SYSTEM32, or C:\WINDOWS\SYSTEM). For PHP <= 4.2.0 copy libsasl.dll, for PHP >= 4.3.0 copy libeay32.dll and ssleay32.dll to your SYSTEM folder.


这些函数的行为受 php.ini 的影响。

表格 1. LDAP configuration options

有关 PHP_INI_* 常量进一步的细节与定义参见附录 G




以下常量由本扩展模块定义,因此只有在本扩展模块被编译到 PHP 中,或者在运行时被动态加载后才有效。





LDAP_OPT_DEREF (integer)













GSLC_SSL_NO_AUTH (integer)




Retrieve information for all entries where the surname starts with "S" from a directory server, displaying an extract with name and email address.

例子 1. LDAP search example

// basic sequence with LDAP is connect, bind, search, interpret search
// result, close connection

echo "<h3>LDAP query test</h3>";
"Connecting ...";
$ds=ldap_connect("localhost");  // must be a valid LDAP server!
echo "connect result is " . $ds . "<br />";

if (
$ds) {
"Binding ...";
$r=ldap_bind($ds);     // this is an "anonymous" bind, typically
                           // read-only access
echo "Bind result is " . $r . "<br />";

"Searching for (sn=S*) ...";
// Search surname entry
$sr=ldap_search($ds, "o=My Company, c=US", "sn=S*");  
"Search result is " . $sr . "<br />";

"Number of entires returned is " . ldap_count_entries($ds, $sr) . "<br />";

"Getting entries ...<p>";
$info = ldap_get_entries($ds, $sr);
"Data for " . $info["count"] . " items returned:<p>";

    for (
$i=0; $i<$info["count"]; $i++) {
"dn is: " . $info[$i]["dn"] . "<br />";
"first cn entry is: " . $info[$i]["cn"][0] . "<br />";
"first email entry is: " . $info[$i]["mail"][0] . "<br /><hr />";

"Closing connection";

} else {
"<h4>Unable to connect to LDAP server</h4>";

Using the PHP LDAP calls

Before you can use the LDAP calls you will need to know ..

  • The name or address of the directory server you will use

  • The "base dn" of the server (the part of the world directory that is held on this server, which could be "o=My Company,c=US")

  • Whether you need a password to access the server (many servers will provide read access for an "anonymous bind" but require a password for anything else)

The typical sequence of LDAP calls you will make in an application will follow this pattern:

  ldap_connect()    // establish connection to server
  ldap_bind()       // anonymous or authenticated "login"
  do something like search or update the directory
  and display the results
  ldap_close()      // "logout"

ldap_8859_to_t61 --  Translate 8859 characters to t61 characters
ldap_add -- Add entries to LDAP directory
ldap_bind -- Bind to LDAP directory
ldap_close -- 别名 ldap_unbind()
ldap_compare -- Compare value of attribute found in entry specified with DN
ldap_connect -- Connect to an LDAP server
ldap_count_entries -- Count the number of entries in a search
ldap_delete -- Delete an entry from a directory
ldap_dn2ufn -- Convert DN to User Friendly Naming format
ldap_err2str --  Convert LDAP error number into string error message
ldap_errno --  Return the LDAP error number of the last LDAP command
ldap_error --  Return the LDAP error message of the last LDAP command
ldap_explode_dn -- Splits DN into its component parts
ldap_first_attribute -- Return first attribute
ldap_first_entry -- Return first result id
ldap_first_reference --  Return first reference
ldap_free_result -- Free result memory
ldap_get_attributes -- Get attributes from a search result entry
ldap_get_dn -- Get the DN of a result entry
ldap_get_entries -- Get all result entries
ldap_get_option -- Get the current value for given option
ldap_get_values_len -- Get all binary values from a result entry
ldap_get_values -- Get all values from a result entry
ldap_list -- Single-level search
ldap_mod_add -- Add attribute values to current attributes
ldap_mod_del -- Delete attribute values from current attributes
ldap_mod_replace -- Replace attribute values with new ones
ldap_modify -- Modify an LDAP entry
ldap_next_attribute -- Get the next attribute in result
ldap_next_entry -- Get next result entry
ldap_next_reference --  Get next reference
ldap_parse_reference --  Extract information from reference entry
ldap_parse_result --  Extract information from result
ldap_read -- Read an entry
ldap_rename -- Modify the name of an entry
ldap_sasl_bind --  Bind to LDAP directory using SASL
ldap_search -- Search LDAP tree
ldap_set_option -- Set the value of the given option
ldap_set_rebind_proc --  Set a callback function to do re-binds on referral chasing
ldap_sort --  Sort LDAP result entries
ldap_start_tls --  Start TLS
ldap_t61_to_8859 --  Translate t61 characters to 8859 characters
ldap_unbind -- Unbind from LDAP directory

add a note add a note User Contributed Notes
gcathell at thetdgroup dot com
08-Jul-2006 12:05
I recently had to access a Microsoft Active Directory server as an LDAP service over SSL using PHP.  It took me a long time to get all the information I needed to get it to work.

I attempted to post a note here with the details but it ended it being too long.  I've placed the details at the following URL in hopes that someone else will benefit and will be able to solve the problem much more quickly than I did.


Good luck!
brudinie at yahoo dot co dot uk
27-Jan-2006 12:43
LDAP Active Directory Last Logon (lastlogon).

This took me an entire day to work out. If you want to get the last logon date from an active directory account, you have to convert it from AD time stamp to unix time stamp.
Once you've got a unix time stamp, PHP can format it as a date.

Here is the code to do it:

       $dateLargeInt=$info[$i]["lastlogon"][0]; // nano seconds (yes, nano seconds) since jan 1st 1601
       $secsAfterADEpoch = $dateLargeInt / (10000000); // seconds since jan 1st 1601
       $ADToUnixConvertor=((1970-1601) * 365.242190) * 86400; // unix epoch - AD epoch * number of tropical days * seconds in a day
       $unixTsLastLogon=intval($secsAfterADEpoch-$ADToUnixConvertor); // unix Timestamp version of AD timestamp
       $lastlogon=date("d-m-Y", $unixTsLastLogon); // formatted date
nacenroe at remove dot this dot nystec dot com
20-Dec-2005 04:28
If you're looking to use PHP to integrate LDAP with AD (I'm working with Win2K3), you may want to tinker with the LDP.exe tool included (no resource kit needed!!) with Win2k and Win2K3.  You can run this app right from the command line.

The Win2K3 Help function was a good start point, and then pointed me to an article in the M$ KB: http://support.microsoft.com/default.aspx?scid=kb;en-us;255602 (XADM: Browsing and Querying Using the LDP Utility).

So ... if your connect/bindings are working but your queries are not, you may want to start here.  I'm finding it very useful when I run it on the local AD to see the attributes, etc.
ooja at roceindhoven dot nl
25-Oct-2005 02:52
If you bind anonymousely to a Windows 2003 Server (Active Directory) and you perform a ldap_search you will get an search operations error. You have to use a login and a password when binding!

I personally found alot of good information here:
christopherbyrne at hotmail dot com
17-Oct-2005 11:53
Just an ammendment to my previous post: my calculations were using east coast Australian time (GMT+10) whereas the Unix timestamp is in GMT. Therefore Active Directoy's "accountexpires" integer value does start from 1-Jan-1601 00:00:00 GMT and the number of seconds between this date and 1-Jan-1970 00:00:00 GMT is 11644524000.

The increments are still definately in 100 nanoseconds though!
christopherbyrne at hotmail dot com
17-Oct-2005 07:32
For anyone who's been having trouble working with the "accountexpires" attribute in Active Directory after having read the following article


or something similar, this may save you some frustration. In the article is is mentioned that this attribute is an integer representing the number of nanoseconds since 01-Jan-1601 00:00:00.

However the "accountexpires" attribute actually seems to be the number of 100 nanosecond increments since 31-Dec-1600 14:00:00. As a result if you divide the integer by 10,000,000 and subtract 11644560000 you will get a Unix timestamp that will match the dates in AD.

To set the "accountexpires" date just reverse the procedure, that is, get the timestamp for the new date you want, add 11644560000 and multiply by 10,000,000. You will also need to format the resultant number to make sure it is not outputted in scientific notation for AD to be happy with it.

Hope this helps!
hijinio at comcast dot net
29-Jul-2005 02:28
In case anybody has trouble configuring PHP with LDAP support on a Solaris 10 box, here is the configure line I used:

./configure --with-nsapi=/opt/SUNWwbsvr --enable-libgcc --disable-libxml --with-ldap=/usr/local --prefix=/opt/php/php-5.0.4

The important part to note is the location used for --with-ldap= ; which for most S10 people, will be "--with-ldap=/usr/local".
jpmens at gmail dot com
11-Mar-2005 06:04
Further to jabba at zeelandnet dot nl's note. If you are trying to connect to an LDAPS URI with OpenLDAP, you can either create the configuration file as described by jabba, or alternatively, use the environment settings to set LDAPTLS_REQCERT=never as described in ldap.conf(5).
scott at wiggumworld dot com
19-Jan-2005 08:08
You can find a PHP class that works well with Active Directory here:

Richie Bartlett(at)ITsystems-Online com
20-Dec-2004 04:44
This is an update to <i>wtfo at technocraft dot com</i> (23-May-2002 03:40)... This function allows additional (optional) parameters. The prev function listed, failed to close the ldap connection after successful authenication.

function checkNTuser($username,$password,$DomainName="myDomain",
// returns true when user/pass enable bind to LDAP (Windows 2k).
#echo $auth_user."->";
#echo "connection ($ldap_server): ";
if($bind=@ldap_bind($connect, $auth_user, $password)){
#echo "true <BR>";
//if bound to ldap
}//if connected to ldap
   #echo "failed <BR>";
//end function checkNTuser
xxoes at gmx dot de
08-Dec-2004 10:24
Yes you musst use LDAP with SSL!

$newPassword = "\"" . $new_password . "\"";
$len = strlen($newPassword);
$newPassw = "";
   $newPassw .= "{$newPassword{$i}}\000";
$userdata["unicodepwd"] = $newPassw;
ldap_mod_replace($dn, $userdata);

My Windows php binary "PHP Version 4.3.9" dos not support LDAP with SSL, i have use stunnel to create a ssl connection.
jabba at zeelandnet dot nl
16-Nov-2004 03:51
When using PHP on windows, and you are trying to connect (bind) to a Netware (6) LDAP server that requires secure connections (LDAPS), PHP will return a message stating that the server cannot be found.
A network traffic capture of the traffic taking place on connection attempt reveals that the server supplies a certificate for use in the SSL connection, but this is rejected (***bad certificate SSLv3 packet) by the client.

The reason for this is probably that the PHP LDAP implementation tries to verify the received certificate with the CA that issued the certificate. There may be a way to make it possible that this verification succeeds, but it is also possible to disable this verification by the client (which is, in this case, PHP) by creating an openldap (surprise!!) configuration file.

The location of this configuration file seems to be hardcoded in the LDAP support module for windows, and you may need to manually create the following directory structure:


In the sysconf folder, create a text file named 'ldap.conf' (you can use notepad for this) and, to disable certificate verification, place the following line in the ldap.conf file:


After this, all the normal ldap_bind calls will work, provided your supplied user id and password are correct.
spam2004 at turniton dot dk
29-Oct-2004 08:36
Here are two small functions that enables you to convert a binary objectSID from Microsoft AD into a more usefull text version (formatted (S-1-5.....)).

// Converts a little-endian hex-number to one, that 'hexdec' can convert
function littleEndian($hex) {
   for ($x=strlen($hex)-2; $x >= 0; $x=$x-2) {
       $result .= substr($hex,$x,2);
   return $result;

// Returns the textual SID
function binSIDtoText($binsid) {
   $rev = hexdec(substr($hex_sid,0,2));          // Get revision-part of SID
   $subcount = hexdec(substr($hex_sid,2,2));    // Get count of sub-auth entries
   $auth = hexdec(substr($hex_sid,4,12));      // SECURITY_NT_AUTHORITY
   $result = "$rev-$auth";
   for ($x=0;$x < $subcount; $x++) {
       $subauth[$x] = hexdec(littleEndian(substr($hex_sid,16+($x*8),8)));  // get all SECURITY_NT_AUTHORITY
       $result .= "-".$subauth[$x];
   return $result;

echo binSIDtoText($bin_sid);
Jimmy Wimenta Oei
24-Sep-2004 03:32
If you want to disable/enable chase referral option, you need to first set the protocol version to version 3, otherwise the LDAP_OPT_REFERRALS option will not have any effect. This is especially true for querying MS Active Directory.

ldap_set_option($ds, LDAP_OPT_REFERRALS, 0);

And as always, these should be called after connect but before binding.
dmeehan at flcancer dot com
13-Aug-2004 04:26
If your having problems running LDAP searches on the base DC against Active Directory 2k3, you need to set dsHeuristics to 0000002 in Active Directory. This allows searches to function similar to how they did in Active Directory 2k2. You can update dsHeuristics by launching ldp.exe goto 'connection' and create a new connection. Then goto bind and bind to your ldap server. Next select the 'Browse' menu and choose 'modify'. The DN *might* look like this:

CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=mycompany,DC=com

Attribute is: dsHeuristics
Value is: 0000002

Set the operation to replace and you should be set.
This solves the 'Operations error' error that happens when attempting to search without specifying an OU.

Sami Oksanen
17-May-2004 09:27
I edited Jon Caplinger's code which is located below (date: 09-Nov-2002 05:44).

 - I corrected line
   "if (!($connect=@ldap_connect($ldap))) {" with
   "if (!($connect=@ldap_connect($ldap_server))) {"

 - Removed $name-attribute

 - "Name is:"-field was always an Array, so I changed printing line to:
   " echo "Name is: ". $info[$i]["name"][0]."<br>";"

I also added some alternative search filters to try out.

Here is the code:


= "ldap://foo.bar.net";
$auth_user = "user@bar.net";
$auth_pass = "mypassword";

// Set the base dn to search the entire directory.

$base_dn = "DC=bar, DC=net";

// Show only user persons
$filter = "(&(objectClass=user)(objectCategory=person)(cn=*))";

// Enable to show only users
// $filter = "(&(objectClass=user)(cn=$*))";

// Enable to show everything
// $filter = "(cn=*)";

// connect to server

if (!($connect=@ldap_connect($ldap_server))) {
"Could not connect to ldap server");

// bind to server

if (!($bind=@ldap_bind($connect, $auth_user, $auth_pass))) {
"Unable to bind to server");

//if (!($bind=@ldap_bind($connect))) {
//    die("Unable to bind to server");

// search active directory

if (!($search=@ldap_search($connect, $base_dn, $filter))) {
"Unable to search ldap server");

$number_returned = ldap_count_entries($connect,$search);
$info = ldap_get_entries($connect, $search);

"The number of entries returned is ". $number_returned."<p>";

for (
$i=0; $i<$info["count"]; $i++) {
"Name is: ". $info[$i]["name"][0]."<br>";
"Display name is: ". $info[$i]["displayname"][0]."<br>";
"Email is: ". $info[$i]["mail"][0]."<br>";
"Telephone number is: ". $info[$i]["telephonenumber"][0]."<p>";
ant at solace dot mh dot se
27-Feb-2004 12:23
When working with LDAP, its worth remembering that the majority
of LDAP servers encode their strings as UTF-8. What this means
for non ascii strings is that you will need to use the utf8_encode and
utf8_decode functions when creating filters for the LDAP server.

Of course, if you can its simpler to just avoid using non-ascii characters
but for most sites the users like to see their strange native character
sets including umlauts etc..

If you just get ? characters where you are expecting non-ascii, then
you might just need to upgrade your PHP version.
pookey at pookey dot co dot uk
08-Oct-2003 04:57
This is an example of how to query an LDAP server, and print all entries out.


= '';
$ldapBase = 'DC=anlx,DC=net';

 * try to connect to the server
$ldapConn = ldap_connect($ldapServer);
if (!
'Cannot Connect to LDAP server');

 * bind anonymously
$ldapBind = ldap_bind($ldapConn);
if (!
'Cannot Bind to LDAP server');

 * set the ldap options
ldap_set_option($ldapConn, LDAP_OPT_PROTOCOL_VERSION, 3);

 * search the LDAP server
$ldapSearch = ldap_search($ldapConn, $ldapBase, "(cn=*)");
$ldapResults = ldap_get_entries($ldapConn, $ldapSearch);

for (
$item = 0; $item < $ldapResults['count']; $item++)
  for (
$attribute = 0; $attribute < $ldapResults[$item]['count']; $attribute++)
$data = $ldapResults[$item][$attribute];
'<hr />';

paul at datacom dot bg
15-Aug-2003 05:40
This note is for people trying to load extensions which require additional dlls on W2k/XP.
As stated in the installation notes one has to copy those libraries to %SystemRoot%\system32 directory.
Generally it's not a good idea to copy files from left to right and back especially for the system folder.
The result is always a mess. I hope you'll find my way to get things working for more elegant than just copying files.
Leave those dlls where they are in dlls folder under PHP's installation path. Then edit environment variables so that the system variable PATH to include the dlls' folder. You may need to reboot the system. That's all, nice and clean.
One who doesn't know what I'm talking about should go this way:
My Computer - > Control Panel -> System -> Advanced -> Environment Variables ... -> System variables.
mrowe at pointsystems dot com
07-Aug-2003 02:58

Before anyone else wastes a day scratching their head wondering why they can't search Active Directory...

I wasn't able to search on Active Directory until I did this (immediately after the ldap_connect):

ldap_set_option($connect, LDAP_OPT_PROTOCOL_VERSION, 3);

I was able to ldap_bind if I didn't set this option, but I kept receiving errors.  Also note, I had to set the option BEFORE binding.
hkemale at hkem dot com
17-Jul-2003 01:49
For IIS+PHP+NTFS file system user
After copied <php_dir>/dlls/*.dll to <windows>/systems32/ remember to add read and exexcute premission to "everyone" and the extensions *.dll. this can prevent warning of Access is denied of php_ldap.dll
greatsafari at hotmail dot com
27-May-2003 02:01
Having seen so many variations of methods for connecting and query the Active Directory server, it really makes me suspect that the whole thing is dependent of the Active Directory configurations. Looking at this post at:


Some methods proven to be working in one instance failed at another instance.
nliu99 at nospam dot yahoo dot com
30-Apr-2003 06:09
libsasl.dll is NOT required for ldap functionalities. Go check out the posting at: http://bugs.php.net/bug.php?id=9485

On win2k I followed these easy steps and got ldap to work:
1. copy php_ldap.dll from the extension folder to winnt/system32
2. edit winnt/php.ini so that ldap is enabled (uncomment the line).
3. restart IIS.
That's it and have fun with ldap.

A note for Microsoft Active Directory
1. You can login with the user email, i.e. user@company.com
2. It's easiest to search for user info with ldap_search by filtering: (userprincipalname=[user])
egeczi at nospamplease dot dist113 dot org
02-Apr-2003 01:05
On Win2k Server running IIS, it is not enough to just restart IIS after enabling the php_ldap extension. You have to restart the server itself.
yorch at correo dot ath dot cx
04-Mar-2003 01:12
Some notes about running LDAP extension on a Win2k box:

After copying php_ldap.php and libsasl.dll in every single directory possible (c:\WinNT\System32, c:\php ...) I decided to read the installation.txt file.
The instructions to install php extensions say: "Some extra DLLs are required for some PHP extensions. Please copy the bundled dlls from the 'dlls/' directory in distribution package to your windows/system (Win9.x) or winnt/system32 (WinNT, Win2000, XP) directory. If you already have these DLLs installed on your system, overwrite them only if something is not working correctly."

So I did exactly that: copy ALL the dll files from "c:\php\dlls" to "c:\WinNT\System32".
Now they load beautifully ;-)

I hope this helps someone.
jon dot caplinger at broadwing dot com
09-Nov-2002 02:44
Here is an example of searching active directory in w2k. Active directory requires a user account that has permissions to search the tree.

/* The following values are used for the example:
  1.  Domain =  microsoft.com
  2.  Server =  unstable
  3.  User = bgates
  4.  Password = iloveopensource

// Get name value to search for from submitted form.

if (isset($HTTP_GET_VARS["name"])) {
     $name = $HTTP_GET_VARS["name"];

$ldap_server = "ldap://unstable.microsoft.com";
$auth_user = "bgates@microsoft.com";
$auth_pass = "iloveopensource";

// Set the base dn to search the entire microsoft.com directory.

$base_dn = "DC=microsoft, DC=com";

/* filter the search for all people in the microsoft.com tree that have a name that matches any one of the following attributes name, displayname, or cn. */
$filter = "(&(objectClass=user)(objectCategory=person)

// connect to server

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

// bind to server

if (!($bind=@ldap_bind($connect, $auth_user, $auth_pass))) {
     die("Unable to bind to server"); 

// search active directory

if (!($search=@ldap_search($connect, $base_dn, $filter))) {
     die("Unable to search ldap server");

$number_returned = ldap_count_entries($connect,$search);
$info = ldap_get_entries($connect, $search);

echo "The number of entries returned is ". $number_returned;

for ($i=0; $i<$info["count"]; $i++) {
   echo "Name is: ". $info[$i]["name"];
   echo "Display name is: ". $info[$i]["displayname"][0];
   echo "Email is: ". $info[$i]["mail"][0];
   echo "Telephone number is: ". $info[$i]["telephonenumber"][0];
gerbille at free dot fr
10-Oct-2002 09:26
The MD5 of PHP returns a result encoded in base16. But the LDAP MD5 returns a string encoded in base64.
Just add "{MD5}" front $pwd_md5 to obtain the same format as LDAP directory.

mike at whisperedlies dot org
10-Sep-2002 12:41
In addition to the netBIOS suggestion above, when binding to a Windows2k AD server, you can use the UPN of the intended user. For instance, if your SAM account name is firstname.lastname and your domain is domainname.com, your UPN might be firstname.lastname@domainname.com

This can be used to bind to AD. I've not seen any difference in any of the methods.
rusko dot marton at gibzone dot hu
11-Jul-2002 08:06
You can authenticate to a Windows 2000 domain's ldap server easily by using the simplified netbios form of the username.

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

NO. You can use this form:

$user = "DOMAINNAME\\username"
$password = "Password_of_user";

if (!$connect = ldap_connect("<server>", <port>)) {
if (!$res = @ldap_bind($ldap, $user, $password)) {

It works fine with Active Directory, we use it.
knitterb at blandsite dot org
20-Jun-2002 11:48
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! :)
wtfo at technocraft dot com
24-May-2002 06:40
This worked for me:

function checkNTUser ($username,$password) {
   $ldapserver = 'Your Server';
   if ($ds) {
       $dn="cn=$username,cn=Users, DC=[sitename], DC=[sitesuffix]";
       if ($r) { return true;
       } else {
           return false;
sukhruprai at yahoo dot com
05-May-2002 09:56
There is an article about how to compile openldap on windows. Openldap binaries are also available for download (for windows).
php ^ pixelcop , com
24-Apr-2002 04:33
For those trying to do LDAP authentication with Lotus Domino NAB, the following has worked for me (based on the win2k example by webmaster@autourdupc.com) :

$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 "</PRE>";
webmaster at autourdupc dot com
31-Dec-2001 08:36
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 !
bounty_arz at hotmail dot com
27-Nov-2001 01:46

There is a way to Access Active Directory :
- You will have to bind as admin :
eg: administrator@yourdomain.com
or as a user :
eg: fschultz@yourdomain.com
(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.

yapt at techNOSPAMnovell dot com
14-Oct-2001 07:37
I have found this new site with a lot of information about LDAP:
mleaver at scis dot ecu dot edu dot au
08-Mar-2001 05:32
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.
ron at opus1 dot com
24-Feb-2000 09:18
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. ;-)