php script for LDAP/ Active directory

code:

<?php
  function getLdapInfo($user,$password,$domain) {
    // Config:
    $ldap_server = "ldaps://<YOUR_LDAP_SERVER>";
    $defaultDN = "dc=<DOMAIN_NAME>,dc=<DOMAIN_TLD>";
    $filter = '(&(objectClass=user)(sAMAccountName='.$user.'))';

    // Script
    $ad = @ldap_connect($ldap_server);              
    ldap_set_option($ad, LDAP_OPT_PROTOCOL_VERSION, 3);
    ldap_set_option($ad, LDAP_OPT_REFERRALS, 0);
    $bd = @ldap_bind($ad,$user.'@'.$domain,$password);
    if (ldap_errno($ad)) {
      switch(ldap_errno($ad)) {
        case 81:
          # Can't connect to LDAP Server
          return(array(
            'errorno' => -1,
            'errorstr' => 'Can\'t connect to Domain Server', 
            'errortxt' => 'Error #'.ldap_errno($ad).': '.ldap_err2str(ldap_errno($ad))
          ));
        case 49:
          # Can't authenticate
          return(array(
            'errorno' => -2,
            'errorstr' => 'Invalid Login/Password',  
            'errortxt' => 'Error #'.ldap_errno($ad).': '.ldap_err2str(ldap_errno($ad))
          ));
        default:
          # Unknown Error
          return(array(
            'errorno' => -99,
            'errorstr' => 'Unknown Error, Please contact support',  
            'errortxt' => 'Error #'.ldap_errno($ad).': '.ldap_err2str(ldap_errno($ad))
          ));
       }
    }
    $result = @ldap_search($ad, $defaultDN, $filter, array('memberOf','displayName','mail','sAMAccountName'));                     
    $entries = @ldap_get_entries($ad, $result);
    if (ldap_errno($ad)) {     
      return(array(
       'errorno' => -3,
       'errorstr' => 'Configuration Error, Please contact support',
       'errortxt' => 'Error #'.ldap_errno($ad).': '.ldap_err2str(ldap_errno($ad))
      ));
    }
    $_RETURN[id] = $entries[0]["samaccountname"][0];
    $_RETURN[name] = $entries[0]["displayname"][0];
    $_RETURN[email] = $entries[0]["mail"][0];
    $_RETURN[groups] = array();
    for ($i=0; $i < $entries[0]["memberof"]["count"]; $i++) {
      array_push($_RETURN[groups],substr($entries[0]["memberof"][$i],3,strpos($entries[0]["memberof"][$i],',')-3));
    }
    return($_RETURN);
    ldap_unbind($ad);
  }

  // Test Code
  print "<pre>";
  print_r(getLdapInfo('<USERNAME>','<PASSWORD>','<DOMAIN_CONTROLLER'));
?>

script end

result of the script
Array
(
    [id] => adambotbyl
    [name] => Adam Botbyl
    [email] => adam@locateadam.com
    [groups] => Array
        (
            [0] => Web Blog
            [1] => Admin
        )
)