ldap_error
I came accros this page and enjoyed the comments.
Since a LDAP string can sometimes be lengthy and have many attributes, I needed to be able to sort through all that is in.
In my case, I needed to get the subdomain part and other parameters.
Here is how I built my method.
<?php
/**
* Parse, and format a DN string to Array
*
* Read a LDAP DN, and return an array keys
* listing all similar attributes.
*
* Also takes care of the character escape and unescape
*
* Example:
* CN=username,OU=UNITNAME,OU=Region,OU=Country,DC=subdomain,DC=domain,DC=com
*
* Would normally return:
* Array (
* [count] => 9
* [0] => CN=username
* [1] => OU=UNITNAME
* [2] => OU=Region
* [5] => OU=Country
* [6] => DC=subdomain
* [7] => DC=domain
* [8] => DC=com
* )
*
* Returns instead a manageable array:
* array (
* [CN] => array( username )
* [OU] => array( UNITNAME, Region, Country )
* [DC] => array ( subdomain, domain, com )
* )
*
*
* @author gabriel at hrz dot uni-marburg dot de 05-Aug-2003 02:27 (part of the character replacement)
* @author Renoir Boulanger
*
* @param string $dn The DN
* @return array
*/
function parseLdapDn($dn)
{
$parsr=ldap_explode_dn($dn, 0);
//$parsr[] = 'EE=Sôme Krazï string';
//$parsr[] = 'AndBogusOne';
$out = array();
foreach($parsr as $key=>$value){
if(FALSE !== strstr($value, '=')){
list($prefix,$data) = explode("=",$value);
$data=preg_replace("/\\\\\\([0-9A-Fa-f]{2})/e", "''.chr(hexdec('\\\\1')).''", $data);
if(isset($current_prefix) && $prefix == $current_prefix){
$out[$prefix][] = $data;
} else {
$current_prefix = $prefix;
$out[$prefix][] = $data;
}
}
}
return $out;
}
?>
ldap_explode_dn
(PHP 4, PHP 5)
ldap_explode_dn — Sépare les différents composants d'un DN
Description
array ldap_explode_dn
( string
$dn
, int $with_attrib
)
Sert à extraire les différents composants du DN
dn. Chaque composant s'appelle un Nom
Distingué Relatif (Relative Distinguished Name ou encore RDN).
Liste de paramètres
-
dn -
Le nom DN de l'entrée LDAP.
-
with_attrib -
Sert à préciser si les RDN sont retournés seuls, ou bien avec leurs attributs. Pour obtenir les attributs en même temps que les RDN (au format attribut=valeur), donnez à
with_attribla valeur de 0 et, sinon, donnez lui la valeur de 1.
Valeurs de retour
Retourne un tableau de tous les composants DN. Le premier élément du tableau a une clé count et représente le nombre de valeurs retournées ; les autres éléments sont les composants DN indexés numériquement.
add a note
User Contributed Notes
ldap_explode_dn - [4 notes]
hello+php at NOSPAM dot renoirboulanger dot com ¶
10 months ago
DavidSmith at byu dot net ¶
9 years ago
[ Editor's Note: The segfault has been fixed and will not occur in PHP 4.3.4 or PHP 5.0.0 when they are released. However, it is still important to escape special characters as detailed below. ]
If your DN contains < or > characters, you must escape them with a backslash or ldap_explode_dn() will give you a "wrong parameter count" error or even a segmentation fault.
For example, these calls will fail with a "wrong parameter count" or a seg fault:
ldap_explode_dn( "cn=<bob>,dc=example,dc=com", 0 );
ldap_explode_dn( 'cn=<bob>,dc=example,dc=com', 0 );
But this will succeed
ldap_explode_dn( "cn=\<bob\>,dc=example,dc=com", 0 );
Notice also that the < and > are escaped with hex codes as noted above. This function is a nice wrapper that properly formats all DNs and can safely be called with < and > characters, and UTF-8 characters:
function my_explode_dn( $dn, $with_attributes=0 )
{
$dn = addcslashes( $dn, "<>" );
$result = ldap_explode_dn( $dn, $with_attributes );
//translate hex code into ascii again
foreach( $result as $key => $value )
$result[$key] = preg_replace("/\\\([0-9A-Fa-f]{2})/e", "''.chr(hexdec('\\1')).''", $value);
return $result;
}
I am using php 4.3.1. Good luck!
gabriel at hrz dot uni-marburg dot de ¶
9 years ago
Keep attention on UTF8 encoded DNs. Since openLDAP >=2.1.2
ldap_explode_dn turns unprintable chars (in the ASCII sense, UTF8
encoded) into \<hexcode>.
Example:
$dn="ou=Universität ,c=DE";
var_dump(ldap_explode_dn($dn,0));
//returns
array(3) {
["count"]=>
int(2)
[0]=>
string(19) "ou=Universit\C3\A4t"
[1]=>
string(4) "c=DE"
}
Unfortunately, PHP don't support the ldap functions ldap_str2dn and
ldap_dn2str, but by means of preg_replace a workaround is possible to
recover the old behaviour of ldap_explode_dn
// workaround
function myldap_explode_dn($dn,$with_attribute){
$result=ldap_explode_dn ($dn, $with_attrib);
//translate hex code into ascii again
foreach($result as $key=>$value){
$result[$key]=preg_replace("/\\\([0-9A-Fa-f]{2})/e", "''.chr(hexdec('\\1')).''", $value);
}
return($result);
}
//
//then follows for the example
$dn="ou=Universität ,c=DE";
var_dump(myldap_explode_dn($dn,0));
//returns
array(3) {
["count"]=>
int(2)
[0]=>
string(15) "ou=Universität"
[1]=>
string(4) "c=DE"
}
bs at muekno dot de ¶
11 years ago
Copying is much better than typing!!!!
Just modify the constants.
Best wishes (and thanX 4 this helpfull site),
Bernd Schwaegerl
Mueller-Knoche GmbH, Systemhaus fuer EDV-Loesungen
# Example:
$HOST = "Yourhostname";
$USER_DN = "Yourldapuser_dn";
$PWD = "Ldapuserpassword";
$BASE_DN = "o=Your_organisation";
$SEARCH_OBJECT="sn=YOUR_SEARCH_PERSON_OBJECTS_SN";
$ldap_handle=ldap_connect($HOST);
$bind_result=ldap_bind($ldap_handle,$USER_DN,$PWD);
$search_result=ldap_search($ldap_handle,$BASE_DN,$SEARCH_OBJECT);
$result=ldap_get_entries($ldap_handle,$search_result);
$result_array=ldap_get_entries($ldap_handle,$result);
$whole_dn=$result_array[0]["dn"];
$dn_parts=ldap_explode_dn($whole_dn,0);