<?php
$username = 'jon';
$password = 'password';
$resource = ldap_connect('server.southwesternedge.com');
ldap_set_option($resource, LDAP_OPT_PROTOCOL_VERSION, 3);
$dn = 'uid=' . $username . ',cn=users,dc=server,dc=southwesternedge,dc=com';
$result = ldap_bind($resource, $dn, $password);
if ($result) {
echo 'Success';
} else {
echo 'Failure';
}