PHP AJAX Image Uploading with FormData

Question

I am relatively new to jQuery and Ajax functions, but have been working with Ajax forms over the past few days. I have come to a problem with file uploads however when tryin

Answer 1

Try with this:

var formData = $('form.upload-form').serialize();

Answer 2

This will work for one or multiple files.

$('input:file').on('change', function () {  

 var data = new FormData();

 //Append files infos
 jQuery.each($(this)[0].files, function(i, file) {
     data.append('file-'+i, file);
 });

 $.ajax({  
     url: "my_path",  
     type: "POST",  
     data: data,  
     cache: false,
     processData: false,  
     contentType: false, 
     context: this,
     success: function (msg) {
          alert(msg);
      }
  });
});

Then

$_FILES['file-0']
$_FILES['file-1']
[...]

But be careful that using FormData doesn't work on IE before IE10

Answer 3

You need to set processData and contentType in your ajax call ( also added id to your input element in order to fetch the file contents).

HTML

    <form class="upload-form">
         <input type="file" id="photo" name="input_photo" class="input_photo" /> 
    </form>

JS

  $(function() {
        $('.input_photo').on("change",function() {    
            var file = document.getElementById("photo").files[0]; //fetch file
            var formData = new FormData();                     
            formData.append('file', file); //append file to formData object

            $.ajax({
                url: "upload.php",
                type: "POST",
                data: formData,
                processData: false, //prevent jQuery from converting your FormData into a string
                contentType: false, //jQuery does not add a Content-Type header for you
                success: function (msg) {
                    alert(msg)
                }
            });
        });
    });