User authentication with LDAP server sample code

ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
$ldapconfig['host'] = xxx.xxx.xxx.xxx';// IP Address
$ldapconfig['port'] = 389; //port(default port is 389)
$ldapconfig['basedn'] ='dc=yyy,dc=yy';

$ds=ldap_connect($ldapconfig['host'], $ldapconfig['port']);

//$dn="uid=".$username.",ou=people,".$ldapconfig['basedn'];
$dn="uid=".charith.",".$ldapconfig['basedn'];
$password='yourdullaa';

if ($bind=ldap_bind($ds, $dn, $password))
{
echo("Login correct");
}
else
{

echo("Unable to bind to server.
");


}