Insert into MySQL Table PHP

Question

I am having some trouble making a simple form to insert data into a MySQL table. I keep getting this SQL error:

\"Error: You have an error in your SQL

Answer 1

?php
  $conn=new mysqli("localhost","root","","inventory")
  or die("not connected".mysqli_connect_error());
  if(isset($_POST['submit']{
    $ItemNumber=$_POST['ItemNumber'];
    $Stock=$_POST['Stock'];
    $sql="insert into current stock(ItemNumber,Stock) values('$ItemNumber','$Stock')";
    $query=mysqli_query($conn,$sql);
    if($query){
      echo"1 row inserted";
    }else{
      echo mysqli_error($conn);
    }
  }
?>