使用带有jquery-rotate插件的php保存旋转的图像

Question

I want to save my rotated image to a file, but I don't know how...

I'm using jquery-rotate plugin to rotate my image, here's my javascript:

   <script>
    $(function() {                                 
         var rotation = 0;                            
         $("#left").click(function() {
             rotation = (rotation -90) % 360; 
             $("#spin-pic").rotate(rotation);
         });
         $("#right").click(function() {
             rotation = (rotation + 90) % 360;
             $("#spin-pic").rotate(rotation);
         });

    });
       </script>

Html:

<input type="submit" id="left"> 
<input type="submit" id="right"> 
<img src="something.jpg" id="spin-pic">

Please help, thank you:)