PHP LDAP 无法搜索用户

Question

我能够成功连接并绑定到 LDAP，我可以查询一个域级别的用户，但不能查询下一级的用户。

我可以查询的base dn:

$ldap_base_dn = 'DC=a_level,DC=company,DC=org';

我要查询的base dn:

$ldap_base_dn = 'DC=b_level,DC=a_level,DC=company,DC=org';

我正在使用管理员帐户绑定到 LDAP。

<?php

/**
 * Get a list of users from Active Directory.
 */
$ldap_password = 'PASSWORD';
$ldap_username = 'ADMIN';
$ldap_connection = ldap_connect('ldap://ldap.company.org/');
if (false === $ldap_connection) {
    // Uh-oh, something is wrong...
    print "CONNECT ERROR<br />";
}

// We have to set this option for the version of Active Directory we are using.
ldap_set_option($ldap_connection, LDAP_OPT_PROTOCOL_VERSION, 3) or die('Unable to set LDAP protocol version');
ldap_set_option($ldap_connection, LDAP_OPT_REFERRALS, 0); // We need this for doing an LDAP search.

if (true === ldap_bind($ldap_connection, $ldap_username, $ldap_password)) {
    print "ldap bind<br />";
    $ldap_base_dn = 'DC=b_level,DC=a_level,DC=company,DC=org';
    $search_filter = '(&(objectCategory=person)(samaccountname=*))';
    $attributes = array();
    $attributes[] = 'givenname';
    $attributes[] = 'mail';
    $attributes[] = 'samaccountname';
    $attributes[] = 'sn';
    $result = ldap_search($ldap_connection, $ldap_base_dn, $search_filter, $attributes);
    if (false !== $result) {
        print "ldap search<br />";
        $entries = ldap_get_entries($ldap_connection, $result);
        for ($x=0; $x<$entries['count']; $x++) {
            if (!empty($entries[$x]['givenname'][0]) &&
                 !empty($entries[$x]['mail'][0]) &&
                 !empty($entries[$x]['samaccountname'][0]) &&
                 !empty($entries[$x]['sn'][0]) &&
                 'Shop' !== $entries[$x]['sn'][0] &&
                 'Account' !== $entries[$x]['sn'][0]) {
                $ad_users[strtoupper(trim($entries[$x]['samaccountname'][0]))] = array('email' => strtolower(trim($entries[$x]['mail'][0])),'first_name' => trim($entries[$x]['givenname'][0]),'last_name' => trim($entries[$x]['sn'][0]));
            }
        }
    }
    ldap_unbind($ldap_connection); // Clean up after ourselves.
}

$message .= "Retrieved ". count($ad_users) ." Active Directory users\n";

print $message;

echo '<pre>';
print_r($entries);
echo '</pre>';

使用程序 Apache Directory studio 我能够运行在 b_level 和搜索库 dn 中搜索用户，所以我不明白为什么 php 版本不起作用。

编辑：

更改显示错误输出。

<?php

/**
 * Get a list of users from Active Directory.
 */
$ldap_password = 'PASSWORD';
$ldap_username = 'ADMIN';
$ldap_connection = ldap_connect('ldap://ldap.company.org/');
if (false === $ldap_connection) {
    // Uh-oh, something is wrong...
    print "CONNECT ERROR<br />";
}

print "Connect Success...<br />";

// We have to set this option for the version of Active Directory we are using.
ldap_set_option($ldap_connection, LDAP_OPT_PROTOCOL_VERSION, 3) or die('Unable to set LDAP protocol version');
ldap_set_option($ldap_connection, LDAP_OPT_REFERRALS, 0); // We need this for doing an LDAP search.

if (true === ldap_bind($ldap_connection, $ldap_username, $ldap_password)) {
    print "Bind Success...<br />";
    $ldap_base_dn = 'DC=b_level,DC=a_level,DC=company,DC=org';
    $search_filter = '(&(objectCategory=person)(samaccountname=*))';
    $attributes = array();
    $attributes[] = 'givenname';
    $attributes[] = 'mail';
    $attributes[] = 'samaccountname';
    $attributes[] = 'sn';
    $result = ldap_search($ldap_connection, $ldap_base_dn, $search_filter, $attributes);
    print "ldap_search error: ".ldap_error($ldap_connection) . '<br />';
    if (false !== $result) {
        print "LDAP Search...<br />";
        $entries = ldap_get_entries($ldap_connection, $result);
        for ($x=0; $x<$entries['count']; $x++) {
            if (!empty($entries[$x]['givenname'][0]) &&
                 !empty($entries[$x]['mail'][0]) &&
                 !empty($entries[$x]['samaccountname'][0]) &&
                 !empty($entries[$x]['sn'][0]) &&
                 'Shop' !== $entries[$x]['sn'][0] &&
                 'Account' !== $entries[$x]['sn'][0]) {
                $ad_users[strtoupper(trim($entries[$x]['samaccountname'][0]))] = array('email' => strtolower(trim($entries[$x]['mail'][0])),'first_name' => trim($entries[$x]['givenname'][0]),'last_name' => trim($entries[$x]['sn'][0]));
            }
        }
    }
    ldap_unbind($ldap_connection); // Clean up after ourselves.
}

$message .= "Retrieved ". count($ad_users) ." Active Directory users\n";

print $message;

echo '<pre>';
print_r($entries);
echo '</pre>';

输出为：

Connect Success...
Bind Success...
ldap_search error: Referral
LDAP Search...
Retrieved 0 Active Directory users
Array
(
    [count] => 0
)

Answer 1

在我看来，base_dn (level_b) 并未存储在您请求的目录中，而是存储在配置为引用的另一个目录中。

您需要：

将行 ldap_set_option($ldap_connection, LDAP_OPT_REFERRALS, 0); 更改为 ldap_set_option($ldap_connection, LDAP_OPT_REFERRALS, true);
配置一个重新绑定的回调函数来追踪推荐：查看http://php.net/manual/en/function.ldap-set-rebind-proc.php了解更多信息

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