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    User Contributed Notes 32 notes

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    15
    nick dot veitch at futurenet dot co dot
    21 years ago
    It might be useful to list here the operators that work:

    = - matches exact value
    =*xxx - matches values ending xxx
    =xxx* - matches values beginning xxx
    =*xxx* - matches values containing xxx
    =* - matches all values (if set - NULLS are not returned)

    >=xxx - matches everthing from xxx to end of directory
    <=xxx - matches everything up to xxx in directory

    ~=xxx - matches similar entries (not all systems)

    Boolean operators for constructing complex search

    &(term1)(term2) - matches term1 AND term2
    | (term1)(term2) - matches term1 OR term2
    !(term1) - matches NOT term1
    &(|(term1)(term2))(!(&(term1)(term2)) - matches XOR term1 term2

    some of the more compelx constructions seem to work with varying degrees of efficiency - sometimes it can be better to filter some of the results with the search and do further filtering in PHP.
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    17
    jayleno at yahoo dot com
    11 years ago
    <?php
    set_time_limit    (30);
    error_reporting(E_ALL);
    ini_set('error_reporting', E_ALL);
    ini_set('display_errors',1);

    // config
    $ldapserver = 'svr.domain.com';
    $ldapuser = 'administrator';
    $ldappass = 'PASSWORD_HERE';
    $ldaptree = "OU=SBSUsers,OU=Users,OU=MyBusiness,DC=myDomain,DC=local";

    // connect
    $ldapconn = ldap_connect($ldapserver) or die("Could not connect to LDAP server.");

    if(    $ldapconn) {
    // binding to ldap server
    $ldapbind = ldap_bind($ldapconn, $ldapuser, $ldappass) or die ("Error trying to bind: ".ldap_error($ldapconn));
    // verify binding
    if ($ldapbind) {
    echo     "LDAP bind successful...<br /><br />";


    $result = ldap_search($ldapconn,$ldaptree, "(cn=*)") or die ("Error in search query: ".ldap_error($ldapconn));
    $data = ldap_get_entries($ldapconn, $result);

    // SHOW ALL DATA
    echo '<h1>Dump all data</h1><pre>';
    print_r($data);
    echo     '</pre>';


    // iterate over array and print data for each entry
    echo '<h1>Show me the users</h1>';
    for (    $i=0; $i<$data["count"]; $i++) {
    //echo "dn is: ". $data[$i]["dn"] ."<br />";
    echo "User: ". $data[$i]["cn"][0] ."<br />";
    if(isset(    $data[$i]["mail"][0])) {
    echo     "Email: ". $data[$i]["mail"][0] ."<br /><br />";
    } else {
    echo     "Email: None<br /><br />";
    }
    }
    // print number of entries found
    echo "Number of entries found: " . ldap_count_entries($ldapconn, $result);
    } else {
    echo     "LDAP bind failed...";
    }

    }

    // all done? clean up
    ldap_close($ldapconn);
    ?>
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    6
    aa529 at nospamchebucto dot ns dot ca
    25 years ago
    Be careful of special characters when generating filters from user input.

    *, (, ), \ and NUL should be backslash-escaped. See section 4 of RFC 2254 (I found it here:
    http://www.cis.ohio-state.edu/htbin/rfc/rfc2254.html)
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    6
    Arnold
    13 years ago
    I have been working on a script where I needed to get all the users who were member of a specific MS AD group. Because of PHP bug #42060 ( http://bugs.php.net/bug.php?id=42060 ) I could not get all the users back who were member of the group.
    After googling for a day I found an article and a patch but it required that I downloaded the source code for php 5.1.6 or 5.2.10 run the patch and than recompile the code to fix the problem.
    Problem was
    1) I am not a Linux goeroe so I was not very comfortable doing this....
    2) I am running the script on a production machine with other code using PHP and did not know what the consequence would bee for that code.
    3) I could not update PHP anymore because in newer versions this patch would probably not work any more.

    But yesterday I saw the light and wrote some code to get around this problem, maybe other people can use it that have the same problem.

    <?PHP
    $startFilter     = "(&(memberOf=" .$ADGroup. "))";
    $startResults = ldap_search($ldapconnect, $userBase, $startFilter, $attr);
    $countResult = ldap_count_entries($ldapconnect,$startResults);

    IF(    $countResult == 1000 OR $countResult == 1500)
    {
    // loop trough the number 97-122 (ASCII number for the characters a-z)
    For($a=97;$a<=122;$a++)
    {
    // translate the number to a character
    $character = chr($a);
    // the new search filter withs returns all users with a last name starting with $character
    $filter = "(&(sn=$character*)(memberOf=$ADGroup))";
    $results = ldap_search($ldapconnect, $userBase, $filter, $attr);
    $countResult2 = ldap_count_entries($ldapconnect,$results);

    // See if the search for all users starting with a specific character still hits the search limit
    // if so than do a new search to find all the users where the last name starts with "aa" and
    // than with "ab", "ac" etc. etc
    // In the best case we can now find 675.324 users per group when the search limit is 1000
    // ((26 * 999 for the fist character) * 26 for the second character)
    // and 1.013.324 when the search limit is 1500
    If($countResult2 == 1000 or $countResult2 == 1500)
    {
    For(    $b=97;$b<=122;$b++)
    {
    $character2 = chr($b);
    $filter2 = "(&(sn=$character$character2*)(memberOf=$ADGroup))";
    $results2 = ldap_search($ldapconnect, $userBase, $filter2, $attr);
    $count2 = ldap_count_entries($ldapconnect,$results2);
    $entries2 = ldap_get_entries($ldapconnect,$results2);

    // do your thing
    }
    }
    Else
    {
    $entries = ldap_get_entries($ldapconnect,$results);
    // do your thing
    }
    }
    }
    else
    {
    $entries = ldap_get_entries($ldapconnect,$startResults);
    // do your thing
    }
    ?>
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    2
    steven_bauman at outlook dot com
    4 years ago
    Can an example using the new $serverctrls parameter please be added? I have no idea how to use this.
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    4
    cruzfern at chuchuwa dot com dot ar
    19 years ago
    The internal attributes (like createTimestamp, modifyTimestamp, etc), don't come by default (when the optional parameter attributes is not set). You have to specify it:

    <?
    $r=ldap_search($ds,$base,$filter,array("createTimestamp"));
    ?>
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    8
    chrisbloom7 at gmail dot com
    17 years ago
    Here are a couple of resources for proper construction of filters.

    http://msdn2.microsoft.com/En-US/library/aa746475.aspx

    http://technet.microsoft.com/en-us/library/aa996205.aspx

    Before finding these I had been stumped for hours on how to do something like "all users starting with "a" except those from OU 'foo'"
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    3
    sembiance at cosmicrealms dot com
    21 years ago
    When searching for BINARY data (such as an Active Directory objectGUID) you need to escape each hexadecimal character with a backslash.

    The following command line run of ldapsearch shows:
    ldapsearch -b "dc=blahblah,dc=com" "(objectGUID=\AE\C3\23\35\F7)"

    In PHP, you need to escape the escape for the backslash:
    ldap_search($ds,"dc=blahblah,dc=com", "(objectGUID=\\AE\\C3\\23\\35\\F7)");
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    3
    francis dot tyers at hp dot com
    21 years ago
    it seems that all fields must be used in lower case even if they are mixed case in the ldapsearch output.

    example:

    gidNumber: 1010
    homeDirectory: /home/dnt

    must be:

    echo "gid: " . $info[$i]["gidnumber"][0] . "<br>";
    echo "home directory: ". $info[$i]["homedirectory"][0] ."<br>";

    not ( $info[$i]["homeDirectory"][0] ) etc.
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    1
    cdaveb at csua dot berkeley dot edu
    23 years ago
    FYI, for those doing LDAP searches on Exchange servers, there seems to be some preference in Exchange to disallow searches that aren't initial searches (i.e. only x* will work, not * or *x). I'd been going nuts trying to figure out why I kept getting errors doing * searches.

    More info at:
    http://www.microsoft.com/Exchange/en/55/help/documents/server/XOG16007.HTM
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    4