<?php 
    header("Access-Control-Allow-Origin: *");
    $ecodedata = $_POST["postdata"];
    //  echo "server say::".($ecodedata); //base64_decode  
    $b= json_decode ($ecodedata);	
	$v= $b->v;
	$w= $b->w;
	$x= $b->x;
	$y= $b->y;
	$z= $b->z;
    require_once "configs.php";
//echo $x;
    //check data 
$sql='SELECT * FROM users where username="'.$x.'"';
$res = $db->query($sql);
$i=0;
while ($row = $res->fetchArray()) {
//    echo "{$row['username']}";
$i++;
}
if ($i>0) $have=$i;
//echo "we have=$have=";
if ($have) { echo "Sorry:[$x] already taken";exit;} else  {

$code="1";
$company=$w;
$businesstype=$v;
// echo "start create user $x $y $code $company $v $z";
//    $sql = "INSERT INTO users (username, email, code, password,company,businesstype) VALUES (?, ? ,?,?,?,?)";
$stmt = $db->prepare("INSERT INTO users (username,email,code,password,company,businesstype) VALUES (?,?,?,?,?,?)");
$stmt->bindParam(1,$x);
$stmt->bindParam(2,$y);
$stmt->bindParam(3,$code);
$stmt->bindParam(4,$z);
$stmt->bindParam(5,$company);
$stmt->bindParam(6,$v);

$stmt->execute();
  if ($db==FALSE) echo "Error in fetch ".$db->lastErrorMsg();
//echo "done  $x $have";
echo "OK";
//$db->close();
}

Edit file:sq_ius.php1399