ต้องการดึงรูปจาก Mysql มาใช้งานบนหน้า PHP ..........

<?php  
 $connect = mysqli_connect("localhost", "root", "", "finalproject2018");  
 $query ="SELECT * FROM boatdb";  
 $result = mysqli_query($connect, $query)  or die("Error: " . mysqli_error($connect)); ;  

  if(isset($_GET['id'])){

          $id = mysql_real_escape_string($_GET['id']);
            $query = mysql_query("SELECT * FROM boatdb WHERE boat_id  = '$boat_id' ");

          while($row = mysql_fetch_assoc($query))
          {
           
            $imageData = $row["img"];

          }

          header("content-type : image/jpeg");
          echo $imageData;

  }



 ?>











<img src="img_view.php?boat_id=45">