How do I fix orientation (upload image) before saving in folder (Javascript)?

Question

I try this reference : https://github.com/blueimp/JavaScript-Load-Image

I try like this : https://jsfiddle.net/oscar11/gazo3jc8/

My code javascript like this

Answer 1

After some researching little bit I found the solution thanks to this great plugin https://github.com/blueimp/JavaScript-Canvas-to-Blob . ( canvas-to-blob.js )

This plugin will convert your canvas to a Blob directly server would see it as if it were an actual file and will get the new(modified) file in you $_FILES array. All you need is call toBlob on the canvas object (img). After that you would get your blob which you then can send in FormData. Below is your updated updateResults() function

function updateResults (img, data) {
  var content
  if (!(img.src || img instanceof HTMLCanvasElement)) {
    content = $('<span>Loading image file failed</span>')
  } 
  else 
  {
       content = $('<a target="_blank">').append(img)
      .attr('download', currentFile.name)
      .attr('href', img.src || img.toDataURL())

      img.toBlob(
           function (blob) {
               var form = new FormData();
               form.append('file', blob, currentFile.name);

               $.ajax({
                  url:'response_upload.php',
                  type:'POST',
                  data:form,
                  processData: false,
                  contentType: false,
                  success: function (response) {
                    console.log(response);
                  },
                  error: function () {
                    console.log(error)
                  },
               });

           },'image/jpeg'   
      );
      result.children().replaceWith(content);
  }
}

Answer 2

You want to change some things about image (dimensions, roataion etc) and upload it on to the server but the problem here is that ImageLoad plugin will give the modified image as an canvas means it won't modify the original file selected in <input type="file" id="file-input">. Since you are sending the file input object in form.append('file', currentFile); your modified file wont get sent but just the original

How to fix?

This is particularity hard you (or plugin) cannot modify anything on <input type="file" id="file-input"> due to browser restrictions neither you can send canvas directly to the server so the only way (used and works great) is to send the data URI of the image as a regular text and then decode it on the server, write it to a file.You might also want to send the original file name since a data URI is pure content and doesn't hold file name

Change

  form.append('file', currentFile);

To

  form.append('file', img.toDataURL() );        // data:image/png;base64,iVBO ...
  form.append('file_name',  currentFile.name ); // filename 

PHP

  $img_data=substr( $_POST['file'] , strpos( $_POST['file'] , "," )+1); 
  //removes preamble ( like data:image/png;base64,)
  $img_name=$_POST['file_name'];

  $decodedData=base64_decode($img_data);

  $fp = fopen( $img_name , 'wb' );
  fwrite($fp, $decodedData);
  fclose($fp );

Good luck!