ldap_get_entries returns array with element count=zero

In some situations ldap_get_entries returns array with element count=zero, so I have an array like array('count'=>0) without any further entries.

What are the conditions for this to happen?

PS:

• if the OU I am searching in is empty I am getting a different error (Invalid Base DN)
• if the user doesn't have permissions to an OU I am getting the same error as above

EDIT:

• the PHP code is irrelevant, since I can do all kind of searches with it and the above mentioned problem happens only in some strange Active Directory configurations
• if you still insists... $entries = ldap_get_entries($this->ldap_connection, $search_result);
• ldap_get_entries returns in most of the cases what I expect it to return with proper errors

So, to restate my question, what are the conditions for ldap_get_entries to return an array with count=0, without any errors. By condition I mean:

• Active Directory rights and permissions
• user permissions
• OU permissions (aka Security tab)
• any PHP related information on when this can happen

Thanks

EDIT2 - as requested, here is the rest of the code:

public function connect() {

    // connect to the server
    $this->ldap_connection = ldap_connect($this->ldap_server);
    if (!$this->ldap_connection){
        $error_message= "LDAP-Connect-Error: " . ldap_error($this->ldap_connection) . ".";
        throw new RuntimeErrorException($error_message);
    }

    // set protocol version
    if (!ldap_set_option($this->ldap_connection, LDAP_OPT_PROTOCOL_VERSION, $this->ldap_protocol_version)){
        $error_message= "LDAP-SetProtocolVersion-Error: " . ldap_error($this->ldap_connection) . ".";
        throw new RuntimeErrorException($error_message);
    }

    // set with/without referrals (limit/do not limit search on current server)
    if (!ldap_set_option($this->ldap_connection, LDAP_OPT_REFERRALS, $this->ldap_protocol_referrals)){
        $error_message= "LDAP-SetReferrals-Error: " . ldap_error($this->ldap_开发者_如何学编程connection) . ".";
        throw new RuntimeErrorException($error_message);
    }

    // binding to ldap server
    if (!@ldap_bind($this->ldap_connection, $this->ldap_auth_rdn, $this->ldap_auth_pass)){
        $error_message= "LDAP-Bind-Error: " . ldap_error($this->ldap_connection) . ".";
        throw new RuntimeErrorException($error_message);
    }
}

public function search($filter,$fields){
    if (!$this->ldap_connection) {
        $this->connect();
    }

    // search the ldap
    $search_result = @ldap_search($this->ldap_connection, $this->ldap_base_distinguished_name, $filter,$fields);
    if ($search_result===false){
        $error_message= "LDAP-Error: " . ldap_error($this->ldap_connection) . ".";
        throw new RuntimeErrorException($error_message);
    }

    //Create result set
    $entries = ldap_get_entries($this->ldap_connection, $search_result);
    if ($entries === false ){
        $error_message= "LDAP-Error: " . ldap_error($this->ldap_connection) . ".";
        throw new RuntimeErrorException($error_message);
    }

    return (is_null($entries) ? array() : $entries); // http://bugs.php.net/48469
}

---

It seems like ldap_connect is successfully connecting to your server.

I think the problem is with the ldap_base_distinguished_name param from ldap_search, make sure that it's correct and you have that base distinguished name in you AD tree.

---

It means what you are searching for didn't return results either because it isn't there or you aren't searching correctly for it.

---

$ldap = new stdclass;
$ldap->host = 'YOUR_HOST';
$ldap->port = 'PORT'; 
$ldap->user = 'YOUR_USER';
$ldap->pass = 'YOUR_PASS';
$ldap->dn  = "CN=Users,DC=DOMAIN,DC=COM,DC=br";
$ldap->filter = '(sAMAccountName=YOUR_USER_NAME)';

try {
    $ldap->conn = ldap_connect($ldap->host,$ldap->port);
    $ldap->bind = ldap_bind($ldap->conn, $ldap->user, $ldap->pass);
    $ldap->option[] = ldap_set_option($ldap->conn, LDAP_OPT_PROTOCOL_VERSION,3);
    $ldap->option[] = ldap_set_option($ldap->conn, LDAP_OPT_REFERRALS,0);
    $ldap->seach=ldap_search($ldap->conn,  $ldap->dn, $ldap->filter);
    $ldap->info = ldap_get_entries($ldap->conn, $ldap->seach); 
    var_dump($ldap);
} catch (Exception $error_message) {
    throw new RuntimeErrorException($error_message);
}