How can I ensure that users are only granted access to the website if they belong to a specific group in the Active Directory?

To ensure that users are only granted access to the website if they belong to a specific group in the Active Directory, you can use LDAP (Lightweight Directory Access Protocol) to authenticate users against the Active Directory and check if they belong to the specified group. 

$ldapServer = 'ldap://your_ldap_server';
$ldapBaseDn = 'dc=example,dc=com';
$ldapAdminUsername = 'admin_username';
$ldapAdminPassword = 'admin_password';

$ldapConn = ldap_connect($ldapServer);
ldap_set_option($ldapConn, LDAP_OPT_PROTOCOL_VERSION, 3);

if ($ldapConn) {
    $ldapBind = ldap_bind($ldapConn, $ldapAdminUsername, $ldapAdminPassword);

    if ($ldapBind) {
        $userDn = 'cn=user,ou=Users,' . $ldapBaseDn;
        $groupDn = 'cn=specific_group,ou=Groups,' . $ldapBaseDn;

        $filter = "(&(objectClass=user)(memberOf=$groupDn))";
        $result = ldap_search($ldapConn, $ldapBaseDn, $filter);
        $entries = ldap_get_entries($ldapConn, $result);

        if ($entries['count'] > 0) {
            // User belongs to the specific group, grant access
            echo 'Access granted';
        } else {
            // User does not belong to the specific group, deny access
            echo 'Access denied';
        }
    }

    ldap_close($ldapConn);
}

Keywords

PHP Active Directory LDAP authentication authorization

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