upload image to database using PHP class PDO, jquery, -

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am having bug in script; trying upload image mysql , using php pdo, classes , jquery. sure script seeing image name. firstly getting error message of undefined variable 'img' not declared, fixed using isset(function), still no image inserted, , empty alert message. sorry say, new here. here code.

form.php // html inputs <form action="" method="post" enctype="multipart/form-data"> <input type="file"  name ="myimage" id="image"> <input type="submit" id="imagesend" > </form>  image.js // image script  $("#imagesend").click(function(){  var postimg = $("#image").attr("name");// image name  var datastring = 'img='+postimg;  $.ajax({     type:"post",     url:"postimage.php",     data:datastring,     success: function(html){     alert(html);    },  }); });   postimage.php // script post image //class script included here  if(isset($_files['img'])){ $image = $_files['img'];  $class = new scriptimage();  $class->sendimage($image); }   class script.php // class script  class scriptimage {   public $dns = "mysql:host=localhost;dbname=inspirationaldb";         public $root ="root";         public $dbpass ="";         public $conn;          //connection string  public function connection(){ $this->conn = new pdo($this->dns, $this->root, $this->dbpass); $this->conn->setattribute( pdo::attr_errmode, pdo::errmode_exception );     }   public function sendimg($uploadname){  $this->connection();  $image_name = $uploadname['name'];  $image_size = $uploadname['size'];  $image_type = $uploadname['type'];  $image_tmp     = $uploadname['tmp_name'];              if($image_size > 1048576){// 1 mb                 echo "large image";                 return false;             }     $path ="post-images/";  $image_exe = $this->getimgextntion($image_type);  $imagefolderpath = $path.$image_name.$image_exe;  $imagedbpath = $imagefolderpath;   if(move_uploaded_file($image_tmp, $imagefolderpath)){   $save=$this->conn->prepare("insert images(image)values(:upload)");  $done=$save->execute(array(":upload" =>$imagedbpath));  if($done){  echo "image saved"; } else{    echo "image not saved";      }    } }

i , nothing happens, no feedback or image in database.


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