File Upload - JQuery Ajax Submission

HTML

<form class="user_event" id="user_events" name="user_events">
 <div class="form-group">
  <label for="name">Event Pamphlet Samples :</label><br><label class="control-label">Select File</label>
  <input id="file" type="file" name="my_name[]"/>
 </div>
 <div class="form-group">
  <button type="submit" class="btn btn-primary pull-right" id="submit">submit</button>
  </div>
 </form>     
 

JQUERY CODE

       
<script>
$(function(){
 $("#user_events").submit(function(event){
 event.preventDefault();
 var value = CKEDITOR.instances['editor1'].getData();
 var formData = new FormData($(this)[0]);
 formData.append('editor1',value);
 $.ajax({
  url:'event_details.php',
      data: formData,
  async: false,
  cache: false,
  contentType: false,
  processData: false,
  type:'POST',
  success:function(result)
  {
   var res=eval('('+result+')');
   $("#display").html("");
   if(res.success==true)
   {
     $( "#display" ).append( "<div><strong>Success</strong></div>" );
   }
   else
   {
    $( "#display" ).append( "<div><strong>Faild</strong></div>" );
   }
  },
  error:function(e)
  {
   console.log(e.message);
  }

 });
});
});
</script>
       
 

FORM SUBMISSION

       

<?php
$efile_name=$_FILES['my_name']['name'][0];
$efile_type=$_FILES['my_name']['type'][0];
$efile_temp=$_FILES['my_name']['tmp_name'][0];
$efile_size=$_FILES['my_name']['size'][0];
$file_exe=strtolower(end(explode('.', $_FILES['my_name']['name'][0])));
$file_ty=array("jpg","jpeg","png");
if(in_array($file_exe,$file_ty===false))
{
 $err[]="please select correct file";
}
if($efile_size>1024000)
{
 $err[]="please select minimum size file";
}
if(empty($err==true))
{
 if(move_uploaded_file($efile_temp,"upload/$efile_name"))
  echo json_encode(array('success'=>true,'msg'=>"Success to upload"));
 else
  echo json_encode(array('success'=>false,'msg'=>"Failed to upload"));
}