Grandstream idle screen

[grandstream-idle-screen-refresh]
Event=>x-gs-screen
Content-Length=>0

<?php
include("/var/www/zphone/etc/config.inc.php");
include($CCBOX["INC"]."func_sql.inc.php");
include($CCBOX["INC"]."func_manager.inc.php");


function zphone_manager_db_get( $family, $key ) {


    $str    = trim(zphone_manager_exec_cmd("database get ".$family." ".$key));
    $uml_nr = (string)str_replace("Value: ","", $str );

    if ( $uml_nr == "" || $uml_nr == -1 || $uml_nr == "0I>" || $uml_nr == 0 )
        return -1;
    else
        return $uml_nr;


    return true;

}





$str = $_SERVER["HTTP_USER_AGENT"];
$_arr = explode("DevId", $str);
$_arr[1] = trim($_arr[1]);

$s = new SQL;
$s->query("SELECT ae_ext FROM ast_users WHERE ae_mac_ip='".strtoupper($_arr[1])."'");
$s->next_record();
$ae_ext = $s->f("ae_ext");
$s->free_result();

//$uml = $ae_ext;
$uml = zphone_manager_db_get( "uml_target", $ae_ext );
print("<?xml version=\"1.0\"?>\n");
?>
<Screen>
   <IdleScreen>
       <ShowStatusLine>true</ShowStatusLine>
       <DisplayString font="f10h" halign="Center" a1reg="false">
           <DisplayStr>$N</DisplayStr>
           <X>64</X>
           <Y>1</Y>
       </DisplayString>
       <DisplayString font="f10b" halign="Center" a1reg="true">
           <DisplayStr>$N</DisplayStr>
           <X>64</X>
           <Y>1</Y>
       </DisplayString>

       <DisplayString font="f16" halign="Center" a1reg="false">
           <DisplayStr>$X</DisplayStr>
           <X>64</X>
           <Y>10</Y>
       </DisplayString>

       <DisplayString font="f16b" halign="Center" a1reg="true">
           <DisplayStr>$X</DisplayStr>
           <X>64</X>
           <Y>10</Y>
       </DisplayString>

<?php
if ( $uml > 0 ) {
?>
       <DisplayString font="f8" halign="Center" a1reg="true">
           <DisplayStr>UML: <?php
           print($uml);
           ?></DisplayStr>
           <X>64</X>
           <Y>28</Y>
       </DisplayString>
<?php
}
?>
       <DisplayString font="f8" halign="Center">
           <DisplayStr>$M $D, $Y</DisplayStr>
           <X>64</X>
           <Y>40</Y>
       </DisplayString>
   </IdleScreen>
</Screen>

exten => h,n,System(/usr/sbin/asterisk -rx "sip notify grandstream-idle-screen-refresh ${CALLERID(num)}")