php - CodeIgniter Upload File Ajax not working -

no matter can't seem file upload via ajax codeigniter method. throws , never sees uploaded file.

html

<div>     <h1>upload translation</h1> </div>  <form method="post" class="myform" enctype="multipart/form-data">         <!-- add span , pther stuff here-->         <input type="file" id="foto1" name="userfile" />         <input type="button" value="submit" onclick="submitfile();" /> </form>  <script>  function submitfile(){         var formurl = "/system_administration/ajax_upload_translation";         var formdata = new formdata($('.myform')[0]);          $.ajax({                 url: formurl,                 type: 'post',                 data: formdata,                 mimetype: "multipart/form-data",                 contenttype: false,                 cache: false,                 processdata: false,                 success: function(data, textsatus, jqxhr){                         //now here response returned php in json fomat can parse using json.parse(data)                 },                 error: function(jqxhr, textstatus, errorthrown){                         //handle here error returned                 }         }); }   </script> 

payload

request method:post status code:200 ok     ------webkitformboundaryvkn2bt8zdxxmkj7y     content-disposition: form-data; name="userfile"; filename="clippy-windows-8-10.jpg"     content-type: image/jpeg   function ajax_upload_translation()     {         if (!isset($_files['userfile']['error']) || is_array($_files['userfile']['error']))          {             throw new runtimeexception('invalid parameters.');         }      } 

try code..

$('#upload').on('click', function() {     var file_data = $('#foto1').prop('files')[0];        var form_data = new formdata();                       form_data.append('file', file_data);     $.ajax({             url: 'your_upload_php_file', // point server-side php script              datatype: 'text',  // expect php script, if             cache: false,             contenttype: false,             processdata: false,             data: form_data,                                      type: 'post',             success: function(php_script_response){                 alert(php_script_response); // display response php script, if             }      }); });