DokuWiki is a popular, open-source, file-based wiki software written in PHP, designed primarily for creating documentation, knowledge bases, and manuals without requiring a database. It is known for being lightweight, easy to maintain, and highly versatile, featuring a simple syntax, built-in access controls, and a vibrant community-supported plugin ecosystem. 

LDAP configuration is in /dokuwiki/conf/local.protected.php:

$conf['useacl']         = 1;           //enable ACL
$conf['authtype']       = 'authldap';  //enable this Auth plugin
$conf['superuser'] = 'admin';
$conf['plugin']['authldap']['server']      = '      ldap://ldap_server:389'; #IP of your ldap
$conf['plugin']['authldap']['usertree']    = 'ou=people,dc=example,dc=com';
$conf['plugin']['authldap']['grouptree']   = 'ou=groups, dc=example, dc=com';
$conf['plugin']['authldap']['userfilter']  = '(&(uid=%{user})(objectClass=person))';
$conf['plugin']['authldap']['groupfilter'] = '(&(member=%{dn})(objectClass=groupOfUniqueNames))';
$conf['plugin']['authldap']['attributes']  = array('cn', 'displayname', 'mail', 'givenname', 'objectclass', 'sn', 'uid', 'memberof');
$conf['plugin']['authldap']['version']    = 3;
$conf['plugin']['authldap']['binddn']     = 'cn=admin,ou=people,dc=example,dc=com';
$conf['plugin']['authldap']['bindpw']     = 'ENTER_YOUR_OpenLDAP_PASSWORD';

DokuWiki by default, ships with an LDAP Authentication Plugin called authLDAP that allows authentication against an LDAP directory. All you need to do is to activate the plugin. This can be done on the DokuWiki Extensions Manager.

Once the LDAP settings are defined, proceed to define the default authentication method. Navigate to Table of Contents > DokuWiki > Authentication. On the Authentication backend, select authldap and save the changes.

More information can be found here:

https://www.dokuwiki.org/plugin:authldap

You can find additional examples on LDAP Auth plugin configurations here.