title: PHP ERROR : mysqli_stmt_bind_param() Number of variables doesn't match number of parameters in prepared statement
body: <p>i am facing a problem in my php file, the error is comming from the parameters in the third statement, but i can not find where is it. Here is my PHP file:</p>
  
  <pre><code>$client = "test";
  $resto = "test";
  
  $st1 = mysqli_query($con, "SELECT client_id FROM Clients WHERE email = '$client'");
  $res1 = mysqli_fetch_array($st1);
  $clientID = $res1["client_id"];
  
  echo "CLIENT ID = ";
  echo $clientID;
  
  $st2 = mysqli_query($con, "SELECT restaurant_id FROM Restaurants WHERE email = '$resto'");
  $res2 = mysqli_fetch_array($st2);
  $restaurantID = $res2["restaurant_id"];
  
  echo "RESTO ID = ";
  echo $restaurantID;
  
  $statement = mysqli_prepare($con, "INSERT INTO reservations (resto_id, client_id) VALUES ($restaurantID,$clientID)");
  
  mysqli_stmt_bind_param($statement,"ii",$restaurantID,$clientID);
  mysqli_stmt_execute($statement);
  
  $response = array();
  $response["success"] = true;  
  
  echo json_encode($response);
  </code></pre>
  
  <p>Thank you in advance for your help.</p>