PHP LDAP -显示组的父组

<?php
// 连接到LDAP服务器
$ldapconn = ldap_connect("ldap.example.com", 389);

if ($ldapconn) {
    // 绑定到LDAP服务器
    $ldapbind = ldap_bind($ldapconn, "cn=admin,dc=example,dc=com", "password");

    if ($ldapbind) {
        // 搜索组
        $result = ldap_search($ldapconn, "ou=groups,dc=example,dc=com", "cn=groupname");

        if ($result) {
            $entries = ldap_get_entries($ldapconn, $result);

            // 遍历找到的组
            for ($i = 0; $i < $entries["count"]; $i++) {
                // 获取组的父组DN
                $parentDN = $entries[$i]["parent"][0];

                // 解析父组DN
                $parentComponents = ldap_explode_dn($parentDN, 0);

                // 显示父组信息
                echo "Parent Group: " . $parentComponents[0] . "\n";
            }
        } else {
            echo "Group not found.";
        }
    } else {
        echo "LDAP bind failed.";
    }
} else {
    echo "LDAP connection failed.";
}

// 关闭LDAP连接
ldap_close($ldapconn);
?>