Untitled

<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" </script>
<script type="text/javascript">
$(document).ready(function() {
$("#submit_custom").click(function() {
var proceed = true;
$("#upload_form input[required=true]").each(function(){
$(this).css('border-color','');
if(!$.trim($(this).val())){ //if this field is empty
$(this).css('border-color','red'); //change border color to red
  proceed = false; //set do not proceed flag
}
  if(proceed)
  post_data = {
 'file': $('input[name=file]').val(),
 'trxid': $('input[name=trxid]').val(),
  'orderid': $('input[name=orderid]').val(),
  'custid': $('input[name=custid]').val()

};
 $.post('upload.php', post_data, function(response){
 if(response.type == 'error'){ //load json data from server and output message
  output = '<div class="error">'+response.text+'</div>';
  }else{
  output = '<div class="success">'+response.text+'</div>';
  $("#upload_form").slideUp(); //hide form after success
                    }
  $("#upload_form").hide().html(output).slideDown();
  }, 'json');
  });
  });
  });
    </script>
</head>
<body>
<h2>Hello <?php echo $user ?> </h2> <p> "You have successfully done purchasing process.</p>
<div id="upload_form">
<p>To send your size details for your order please upload the following file:</p>
<p>Download custom size form Provide us your custom size: <a  href="download.php?download_file=custom-measurement-form.pdf">File.pdf</a></p>
<form enctype="multipart/form-data" action="" method="post">
    <input type="text" name="trxid" value="<?=$trx?>">
    <input type="text" name="orderid" value="<?=$orderid?>">
    <input type="text" name="custid" value="<?=$customerid?>">
    <input type="file" name="file">
    <input type="submit" id="submit_custom">
</form>
</div>
</body>
</html>

<?php
if(isset($_POST['file'])){
if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
  $output = json_encode(array( //create JSON data
            'type'=>'error',
            'text' => 'Sorry Request must be Ajax POST'
   ));
   die($output);
    }
    $file=$_FILES['file']['name'];
    $trx=$_POST['trxid'];
    $oid=$_POST['orderid'];
    $cid=$_POST['custid'];
    echo $file;

    $query=mysqli_query($con,"insert into payments(custom_file) value ('$file') where orderid='$oid',trx_id='$trx' and cust_id='$cid' ");
    if($query){
        $m=move_uploaded_file($_FILES['file']['name'],'./ServerUploadedFiles/'.$trx.$file);
        $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_name .' Thank you for your email'));
        die($output);
    }
    else
    {
        $output = json_encode(array('type'=>'error', 'text' => 'Problem uploading file! .'));
        die($output);
    }
}

?>