LDAP and PHP connection failure

Question

I am trying to connect to a secure LDAP server (using LDAPs) via PHP, but I am having problems with it. I get the following error

Warning: ldap_bind()

Answer 1

I think you just need to set the ldap protocol version to be 3

echo "
LDAP query test
";
echo "Connecting ...";

$ldap_server = 'ldaps://server';
$ldap_port = '636';

$ds = ldap_connect($ldap_server, $ldap_port);

if ($ds) 
{
    //add this
    if (!ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3)) 
    {
        fatal_error("Failed to set LDAP Protocol version to 3, TLS not supported.");
    }
    echo "

Binding ..."; 
    $r=ldap_bind($ds);     // this is an "anonymous" bind, typically
                       // read-only access
    echo "Bind result is " . $r . "
";

    echo "Searching for (sn=S*) ...";
    // Search surname entry
    $sr=ldap_search($ds, "ou=people,o=server.ca,o=server", "uid=username*");  
    echo "Search result is " . $sr . "
";

    echo "Number of entires returned is " . ldap_count_entries($ds, $sr) . "
";

    echo "Getting entries ...
";
    $info = ldap_get_entries($ds, $sr);
    echo "Data for " . $info["count"] . " items returned:
";

    print_r($info);
    //    for ($i=0; $i<$info["count"]; $i++) {
    //        echo "dn is: " . $info[$i]["dn"] . "
";
    //        echo "first cn entry is: " . $info[$i]["cn"][0] . "
";
    //        echo "first email entry is: " . $info[$i]["mail"][0] . "
";
    //    }

    echo "Closing connection";
    ldap_close($ds);

} 
else 
{
    echo "
Unable to connect to LDAP server
";
}