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PHP - Manual: LDAP 函数

2024-11-15

LDAP 函数

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User Contributed Notes 34 notes

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31
idbobby at rambler dot ru
11 years ago
First of all, sorry for my English.
Here are two functions to check group membership and some others which can be useful for work with LDAP (Active Directory in this example).

index.php
---------

<?php

$user = 'bob';
$password = 'zhlob';
$host = 'myldap';
$domain = 'mydomain.ex';
$basedn = 'dc=mydomain,dc=ex';
$group = 'SomeGroup';

$ad = ldap_connect("ldap://{$host}.{$domain}") or die('Could not connect to LDAP server.');
ldap_set_option($ad, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ad, LDAP_OPT_REFERRALS, 0);
@ldap_bind($ad, "{$user}@{$domain}", $password) or die('Could not bind to AD.');
$userdn = getDN($ad, $user, $basedn);
if (checkGroupEx($ad, $userdn, getDN($ad, $group, $basedn))) {
//if (checkGroup($ad, $userdn, getDN($ad, $group, $basedn))) {
    echo "You're authorized as ".getCN($userdn);
} else {
    echo 'Authorization failed';
}
ldap_unbind($ad);

/*
* This function searchs in LDAP tree ($ad -LDAP link identifier)
* entry specified by samaccountname and returns its DN or epmty
* string on failure.
*/
function getDN($ad, $samaccountname, $basedn) {
    $attributes = array('dn');
    $result = ldap_search($ad, $basedn,
        "(samaccountname={$samaccountname})", $attributes);
    if ($result === FALSE) { return ''; }
    $entries = ldap_get_entries($ad, $result);
    if ($entries['count']>0) { return $entries[0]['dn']; }
    else { return ''; };
}

/*
* This function retrieves and returns CN from given DN
*/
function getCN($dn) {
    preg_match('/[^,]*/', $dn, $matchs, PREG_OFFSET_CAPTURE, 3);
    return $matchs[0][0];
}

/*
* This function checks group membership of the user, searching only
* in specified group (not recursively).
*/
function checkGroup($ad, $userdn, $groupdn) {
    $attributes = array('members');
    $result = ldap_read($ad, $userdn, "(memberof={$groupdn})", $attributes);
    if ($result === FALSE) { return FALSE; };
    $entries = ldap_get_entries($ad, $result);
    return ($entries['count'] > 0);
}

/*
* This function checks group membership of the user, searching
* in specified group and groups which is its members (recursively).
*/
function checkGroupEx($ad, $userdn, $groupdn) {
    $attributes = array('memberof');
    $result = ldap_read($ad, $userdn, '(objectclass=*)', $attributes);
    if ($result === FALSE) { return FALSE; };
    $entries = ldap_get_entries($ad, $result);
    if ($entries['count'] <= 0) { return FALSE; };
    if (empty($entries[0]['memberof'])) { return FALSE; } else {
        for ($i = 0; $i < $entries[0]['memberof']['count']; $i++) {
            if ($entries[0]['memberof'][$i] == $groupdn) { return TRUE; }
            elseif (checkGroupEx($ad, $entries[0]['memberof'][$i], $groupdn)) { return TRUE; };
        };
    };
    return FALSE;
}

?>
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5
spam2004 at turniton dot dk
17 years ago
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) {
    $hex_sid=bin2hex($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);
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3
gcathell at thetdgroup dot com
15 years ago
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.

http://greg.cathell.net/php_ldap_ssl.html

Good luck!
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9
oscar dot php at linaresdigital dot com
7 years ago
There is a lot of confusion about accountExpires, pwdLastSet, lastLogon and badPasswordTime active directory fields.

All of them are using "Interval" date/time format with a value that represents the number of 100-nanosecond intervals since January 1, 1601 (UTC, and a value of 0 or 0x7FFFFFFFFFFFFFFF, 9223372036854775807, indicates that the account never expires): https://msdn.microsoft.com/en-us/library/ms675098(v=vs.85).aspx

So if you need to translate it from/to UNIX timestamp you can easily calculate the difference with:

<?php
$datetime1 = new DateTime('1601-01-01');
$datetime2 = new DateTime('1970-01-01');
$interval = $datetime1->diff($datetime2);
echo ($interval->days * 24 * 60 * 60) . " seconds\n";
?>

The difference between both dates is 11644473600 seconds. Don't rely on floating point calculations nor other numbers that probably were calculated badly (including time zone or something similar).

Now you can convert from LDAP field:

<?php
$lastlogon = $info[$i]['lastlogon'][0];
// divide by 10.000.000 to get seconds from 100-nanosecond intervals
$winInterval = round($lastlogon / 10000000);
// substract seconds from 1601-01-01 -> 1970-01-01
$unixTimestamp = ($winInterval - 11644473600);
// show date/time in local time zone
echo date("Y-m-d H:i:s", $unixTimestamp) ."\n";
?>

Hope it helps.
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3
maykelsb at yahoo dot com dot br
15 years ago
Problems with ldap_search in W2k3, can be solved adding

// -- $conn is a valid ldap connection.

ldap_set_option($conn, LDAP_OPT_PROTOCOL_VERSION,3);
ldap_set_option($conn, LDAP_OPT_REFERRALS,0);

before ldap_bind, as sad in http://bugs.php.net/bug.php?id=30670.
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3
jabba at zeelandnet dot nl
17 years ago
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:

C:\openldap\sysconf\

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:

TLS_REQCERT never

After this, all the normal ldap_bind calls will work, provided your supplied user id and password are correct.
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1
hijinio at comcast dot net
16 years ago
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".
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1
Richie Bartlett(at)ITsystems-Online com
17 years ago
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.

<?php
function checkNTuser($username,$password,$DomainName="myDomain",
                      $ldap_server="ldap://PDC.example.net"){//v0.9
// returns true when user/pass enable bind to LDAP (Windows 2k).
    $auth_user=$username."@".$DomainName;
    #echo $auth_user."->";
    if($connect=@ldap_connect($ldap_server)){
        #echo "connection ($ldap_server): ";
        if($bind=@ldap_bind($connect, $auth_user, $password)){
            #echo "true <BR>";
            @ldap_close($connect);
            return(true);
        }//if bound to ldap
    }//if connected to ldap
    #echo "failed <BR>";
    @ldap_close($connect);
    return(false);
}//end function checkNTuser
?>
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2
llurovi at gmail dot com
5 years ago
For those of you that are having trouble when user's password has special characters, make sure you decode the string to an appropiate codification. For instance, I had an issue where some users could not logging properly into our web app.

Example of a simple connection:

<?php

$ldap_ip = 'LDAP-SERVER-IP';
$ldap = ldap_connect($ldap_ip);

$user = 'Test';
$password = 'otoño'; //This password is correct but binding it with this format will give us an error

$password = utf8_decode($password); //$password = otoxF1o

$ldap_bind = ldap_bind($ldap, $user, $password); //Now the binding is successfull and $ldap_bind = true

?>
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2
unroar at gmail dot com
15 years ago
In Solaris 9 the libnet library is a prerequisite for building  PHP with LDAP, SASL and SSL (libnet is available on Sunfreeware). 

I didn't see this mentioned anywhere and I'm not sure if it is required by ldap or sasl or ssl.  I just spent an hour on Google with no luck before I figured it out, maybe this comment will help the next googler.

The error is,
ld: fatal: library -lnet: not found
ld: fatal: File processing errors. No output written to sapi/cli/php
collect2: ld returned 1 exit status
make: *** [sapi/cli/php] Error 1
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2
Sami Oksanen
18 years ago
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:

<?php

$ldap_server = "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))) {
     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");
}

//if (!($bind=@ldap_bind($connect))) {
//     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."<p>";

for ($i=0; $i<$info["count"]; $i++) {
   echo "Name is: ". $info[$i]["name"][0]."<br>";
   echo "Display name is: ". $info[$i]["displayname"][0]."<br>";
   echo "Email is: ". $info[$i]["mail"][0]."<br>";
   echo "Telephone number is: ". $info[$i]["telephonenumber"][0]."<p>";
}
?>
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1
alex at netflex dot nl
14 years ago
If you want to use ldaps on windows but you don't want to validate the tls certificate try the following line before the ldap_connect call:

putenv('LDAPTLS_REQCERT=never') or die('Failed to setup the env');
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1
christopherbyrne at hotmail dot com
16 years ago
For anyone who's been having trouble working with the "accountexpires" attribute in Active Directory after having read the following article

www.microsoft.com/technet/scriptcenter/
resources/qanda/sept05/hey0902.mspx

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!
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2
ben_demott at hotmail dot com
14 years ago
For anyone that is a programmer and not extremely familiar with naming conventions in Microsoft Active Directory or how to find objects within the directory, or more importantly how to reference the objects.
Running "adsiedit.msc" from the command line will display all of your objects in the directory in an easy to read and copyable naming format.
Hope this is helpful!

Note:
You must Run this command from an AD Domain Controller
You Must have the Windows Resource Kit Tools installed
(wouldn't let me make a link that long so I had to make a link break - Sorry!)
a http://www.microsoft.com/downloads/details.aspx
?FamilyID=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=en

Installing this tool should modify your system path so you can just type the command from the run dialogue, otherwise the absolute path is:
C:\Program Files\Windows Resource Kits\Tools\adsiedit.msc
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2
nacenroe at remove dot this dot nystec dot com
16 years ago
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.
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2
christopherbyrne at hotmail dot com
16 years ago
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!
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2
jpmens at gmail dot com
17 years ago
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).
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0
Andrew Sharpe
10 years ago
To compile PHP 5.1.6 on RHEL 6.2 x86_64, add the following to your configure command:

--with-libdir=lib64
--with-ldap=/usr
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1
Jimmy Wimenta Oei
17 years ago
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.

<?php
ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ds, LDAP_OPT_REFERRALS, 0);
?>

And as always, these should be called after connect but before binding.
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1
pookey at pookey dot co dot uk
18 years ago
This is an example of how to query an LDAP server, and print all entries out.

<?php

$ldapServer = '127.0.0.1';
$ldapBase = 'DC=anlx,DC=net';

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

/*
* bind anonymously
*/
$ldapBind = ldap_bind($ldapConn);
if (!$ldapBind)
{
  die('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];
    echo $data.":&nbsp;&nbsp;".$ldapResults[$item][$data][0]."<br>";
  }
  echo '<hr />';
}

?>
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1
greatsafari at hotmail dot com
19 years ago
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:

http://www.phpbuilder.com/mail/php-general/2003022/1459.php

Some methods proven to be working in one instance failed at another instance.
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1
nliu99 at nospam dot yahoo dot com
19 years ago
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])
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1
egeczi at nospamplease dot dist113 dot org
19 years ago
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.
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1
yorch at correo dot ath dot cx
19 years ago
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.
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1
gerbille at free dot fr
19 years ago
The MD5 of PHP returns a result encoded in base16. But the LDAP MD5 returns a string encoded in base64.
$pwd="toto";
$pwd_md5=base64_encode(mhash(MHASH_MD5,$pwd));
Just add "{MD5}" front $pwd_md5 to obtain the same format as LDAP directory.

Bye
Aur?lia
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1
knitterb at blandsite dot org
20 years ago
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! :)
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0
Tod
14 years ago
Notes for people running PHP 4 with Apache 2.2 on Win2k3.
The Apache Service needs to be running under the local administrators account in order for the ldap_connect to return a result. As apposed to the Domain Administrators account as may happen on servers in an Active Directory Domain.

It will 'appear' to work ok but will return no results otherwise.

so use (server name)\administrator for the username in the service logon properties.

Tod
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0
jector at inbox dot ru
15 years ago
Spent some time on fixing "Unable to load dynamic library 'php_ldap.dll'. Copied libeay32.dll and ssleay32.dll  everywhere, but error still stands.

After digging all this dlls I found, that both libeay32.dll and ssleay32.dll need msvcr70.dll (or msvcr71.dll, it depends on the compiler version). Then just copy that dll to system32\ dir and it works perfectly.
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0
nigelf at esp dot co dot uk
15 years ago
Chasing referrals in Active Directory (ie: searching across domains), can be slow.  You can look up the object instead in the GC (Global Catalog) as follows:

Remove any reference to ldap:// when you use ldap_connect, ie: use "serv1.mydom.com" NOT "ldap://serv1.mydom.com"

Connect to port 3268 (not 389, the default)

Set the Base DN for the search to null ie: "" (empty quotes). 

AD will then run the search against the GC which holds a copy of all objects in the Forest.  You can also retrieve a subset of attributes (including group membership, except local groups).

You will still need to follow referals for a full set of attributes.
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0
ant at solace dot mh dot se
18 years ago
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.
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0
hkemale at hkem dot com
18 years ago
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
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0
mike at whisperedlies dot org
19 years ago
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.
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0
rusko dot marton at gibzone dot hu
19 years ago
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 (!$connect = ldap_connect("<server>", <port>)) {
  //error
  exit;
}
if (!$res = @ldap_bind($ldap, $user, $password)) {
  //error
  exit;
}

It works fine with Active Directory, we use it.
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0
webmaster at autourdupc dot com
20 years ago
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 !
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官方地址：https://www.php.net/manual/en/ref.ldap.php

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