Question

I want to delete a database row which contains a file name when the user clicks on cancel button. Problem is that it is not deleting the database row. What am I doing wrong that the database row is not being cancelled?

Below is the relevant code of the form:

var $fileImage = $("<form action='imageupload.php' method='post' enctype='multipart/form-data' target='upload_target' onsubmit='return imageClickHandler(this);' class='imageuploadform' >" + 
  "Image File: <input name='fileImage' type='file' class='fileImage' /></label><br/><br/><label class='imagelbl'>" + 
  "<input type='submit' name='submitImageBtn' class='sbtnimage' value='Upload' /></label>" +     
  "</p><p class='imagef1_cancel' align='center'><label>" + 
  "<input type='button' name='imageCancel' class='imageCancel' value='Cancel' /></label>" +
  "<iframe class='upload_target' name='upload_target' src='#' style='width:0;height:0;border:0px;solid;#fff;'></iframe></form>");

Below is the startImageUpload() function where it starts an file upload and where the cancel button function is stored:

  function startImageUpload(imageuploadform, imagefilename){
    $('.imagef1_cancel').eq(window.lastUploadImageIndex).find(".imageCancel").on("click", function(event) {
      return stopImageUpload(2);
      });     
    return true;
  }

Below is the stopImageUpload() function where it displays the cancel message using success and result:

function stopImageUpload(success, imagefilename){
  var result = '';
  if (success == 2){
    result = '<span class="imagecemsg"> The file upload was canceled!</span><br/><br/>';
  } else {
    result = '<span class="imageemsg">There was an error during file upload!</span><br/><br/>';
  }         
  return true;   
}

Finally below is the imageupload.php script which is linked to the QandATable.php (The script which contains the code above) using iframe and this is where the database row is suppose to be deleted from:

<?php
  session_start();
  ...//connected to DB
  $result = 0;

  if ($result == 2) {
    $imagecancelsql = "DELETE FROM Image 
                       WHERE ImageFile = 'ImageFiles/".
                       mysql_real_escape_string($_FILES['fileImage']['name'])."'";
    mysql_query($imagecancelsql);
  }
  mysql_close();
?>
<script language="javascript" type="text/javascript">window.top.stopImageUpload(<?php echo $result ? 'true' : 'false'; ?>, '<?php echo $_FILES['fileImage']['name'] ?>');</script>

Answer 1

In imageupload.php You declared:

$result = 0;

Then you say:

if ($result == 2)...

$result is 0 not 2 so the query will not be executed.