<?php
$uid = 'mmishra';
$pwd = 'happy@2015';
                $ds = ldap_connect("ldap.iiita.ac.in");
                ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
                $a = ldap_search($ds,"dc=iiita,dc=ac,dc=in", "uid=$uid");
                $b = ldap_get_entries($ds, $a);
                $dn = $b[0]["dn"];
                //******************************************************
echo $dn;
                if (ldap_bind($ds, $dn, $pwd))
                        echo 'TRUE';
?>