mysql encoding check

<?
error_reporting(0);
function runSQL($rsql) {
    $hostname = "localhost";
    $username = "root";
    $password = "";
    $dbname   = "country";
    $connect = mysql_connect($hostname,$username,$password) or die ("Error: could not connect to database");
    $db = mysql_select_db($dbname);
    $result = mysql_query($rsql) or die ('test');
    return $result;
    mysql_close($connect);
}

function countRec($fname,$tname,$where) {
$sql = "SELECT count($fname) FROM $tname $where";
$result = runSQL($sql);
while ($row = mysql_fetch_array($result)) {
return $row[0];
}
}
$page = $_POST['page'];
$rp = $_POST['rp'];
$sortname = $_POST['sortname'];
$sortorder = $_POST['sortorder'];

if (!$sortname) $sortname = 'name';
if (!$sortorder) $sortorder = 'desc';
        if($_POST['query']!=''){
            $where = "WHERE `".$_POST['qtype']."` LIKE '%".$_POST['query']."%' ";
        } else {
            $where ='';
        }
        if($_POST['letter_pressed']!=''){
            $where = "WHERE `".$_POST['qtype']."` LIKE '".$_POST['letter_pressed']."%' ";
        }
        if($_POST['letter_pressed']=='#'){
            $where = "WHERE `".$_POST['qtype']."` REGEXP '[[:digit:]]' ";
        }
$sort = "ORDER BY $sortname $sortorder";

if (!$page) $page = 1;
if (!$rp) $rp = 10;

$start = (($page-1) * $rp);

$limit = "LIMIT $start, $rp";

$sql = "SELECT id,iso,name,printable_name,iso3,numcode FROM country $where $sort $limit";
$result = runSQL($sql);

$total = countRec('iso','country',$where);

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT" );
header("Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . "GMT" );
header("Cache-Control: no-cache, must-revalidate" );
header("Pragma: no-cache" );
header("Content-type: text/x-json");
$json = "";
$json .= "{\n";
$json .= "page: $page,\n";
$json .= "total: $total,\n";
$json .= "rows: [";
$rc = false;
while ($row = mysql_fetch_array($result)) {
if ($rc) $json .= ",";
$json .= "\n{";
$json .= "id:'".$row['id']."',";
$json .= "cell:['".$row['id']."','".$row['iso']."'";
$json .= ",'".addslashes($row['name'])."'";
$json .= ",'".addslashes($row['printable_name'])."'";
$json .= ",'".addslashes($row['iso3'])."'";
$json .= ",'".addslashes($row['numcode'])."']";
$json .= "}";
$rc = true;
}
$json .= "]\n";
$json .= "}";
echo $json;
?>