如果用户存在，我正在尝试搜索Active Directory。我收到以下错误消息。"无法搜索LDAP服务器"。可能出了什么问题？请提出建议。
<?php
// LDAP variables
$ldaphost = "servername"; // your ldap servers
$ldapport = 389; // your ldap server's port number
// Connecting to LDAP
$ldapconn = ldap_connect($ldaphost, $ldapport)
or die("Could not connect to $ldaphost");
$user = 'mylastname';
//search user in /Admin/IT/Users
$dn = "OU=Admin, OU=IT, OU=Users, DC=school, DC=edu";
$filter = "(sAMAccountName=" . $user . ")";
$attr = array("memberof");
$result = ldap_search($ldapconn , $dn, $filter, $attr) or exit("Unable to search LDAP server");
$entries = ldap_get_entries($ldapconn, $result);
echo $entries["count"]." entries returned'n";
?>
如果您正在与Active Directory服务器通信，则应始终将ldap协议版本设置为3并关闭引用处理：
ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0);
此外，一个可分辨名称不应该以空格分隔-按如下方式重新格式化：
$dn = "OU=Admin,OU=IT,OU=Users,DC=school,DC=edu";
最后，如果出现问题，请始终检查LDAP服务器的说明！
$result = ldap_search($ldapconn, $dn, $filter, $attr) or exit("Unable to search LDAP server, response was: " . ldap_error($ldapconn));