How do I insert the Bitmap file into mysql?

...
        $profilePic=$_GET['userImageString'];
        $con=mysqli_connect ("###","###","###","###") or die ("inaccessible";
            #require_once('dbConnect.php');         
        $sql = "INSERT INTO songDB(username,userID,songName,contents,filepath,profilePic) 
                VALUES('$username','$userID','$songName','$contents','$filepath','$profilePic')";
    if(mysqli_query($con,$sql)){
        echo 'successfully Upload';
    }else{
        echo 'oops! Please try again!';
    }      

    private void uploadSongDB() {    
         ...
        Bitmap userImage=MainActivity.UserIDClass.getUserImage();
        String userImageString=BitMapToString(userImage);

        String urlSuffix = "?username="+userName+"&userID="+userID+"&songName="+songName+"&contents="
                      +contents+"&filepath="+filepath+"&userImageString"+userImageString;

        class RegisterUser extends AsyncTask<String, Void, String>{

            ProgressDialog loading;

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                loading = ProgressDialog.show(RecordActivity.this, "Please Wait",null, true, true);
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                loading.dismiss();
                if(s.equals("successfully Upload")) {
                    Toast.makeText(getApplicationContext(),s,Toast.LENGTH_LONG).show();
                    Intent intent = new Intent(RecordActivity.this, UploadActivity.class);        
                    intent.putExtra("path", MainActivity.UserIDClass.getUploadFilepath());
                    startActivity(intent);
                    finish();

                }
                else{
                    Toast.makeText(getApplicationContext(),s,Toast.LENGTH_LONG).show();

                }
            }

            @Override
            protected String doInBackground(String... params) {
                String s = params[0];
                BufferedReader bufferedReader = null;
                try {
                    URL url = new URL(UPLOAD_URL+s);
                    HttpURLConnection con = (HttpURLConnection) url.openConnection();
                    bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

                    String result;

                    result = bufferedReader.readLine();

                    return result;
                }catch(Exception e){
                    return null;
                }
            }
        }

        RegisterUser ru = new RegisterUser();
        ru.execute(urlSuffix);
    }