mystery upload code

//PHP

<?php
try{
if(isset($_FILES['uploadfile'])){
    $total_files = count($_FILES['uploadfile']['name']);
    if( $total_files > 0){

        for($i=0; $i<$total_files; $i++) {

            $file_name = $_FILES['uploadfile']['name'][$i];
            $file_size = $_FILES['uploadfile']['size'][$i];
            $file_tmp  = $_FILES['uploadfile']['tmp_name'][$i];
            $file_type = $_FILES['uploadfile']['type'][$i];

            $upload_Path = "storage/".$file_name;

            //var_dump($file_size);
            //die;

            if($file_size > 8000000){
                echo json_encode( array('status' => 'failure'  , 'msg' => 'Total upload size must be less than 8 MB.')  );
                die();
            }

            if($file_tmp == ""){
                echo json_encode( array('status' => 'failure'  , 'msg' => 'There is no filepath.')  );
                die();
            }
            else{
                if(!file_exists($upload_Path)){
                    move_uploaded_file($file_tmp, $upload_Path);
                }
                else{
                    $name = pathinfo($file_name, PATHINFO_FILENAME);
                    $ext  = pathinfo($file_name, PATHINFO_EXTENSION);
                    $new_name = $name.rand().'.'.$ext;

                    $new_Path = "storage/".$new_name;
                    move_uploaded_file($file_tmp, $new_Path);
                }
            }
        }
    }
    echo json_encode( array('status' => 'success'  , 'msg' => 'File uploaded succesfully.')  );
    die();
}

else{

    echo json_encode(array("status" => "error" , "msg" => "No file was found when processing uploaded files" ) );
    die();
}


}
catch(Exception $ex){

echo json_encode(array('status' => 'error' , 'msg' => 'An unhandled exception raised: ' . $ex->getMessage() ) );
die();
}

?>


//HTML

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Upload Files</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.1/css/font-awesome.min.css" rel="stylesheet">
<link href='https://fonts.googleapis.com/css?family=Raleway:400italic|Courgette' rel='stylesheet' type='text/css'>
<link href="styles.css" rel="stylesheet">
<link href="reset.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $('#upload').click(function(){
        $('input[type=file]').click();
        return false;
    });

	$("#uploadfile").change(function(){
         //submit the form here
		var files = $("#fileupload")[0];
		var formdata = new FormData(files);
			$.ajax({
				type:'POST',
				url: 'mupld.php',
				data: formdata,
				processData:false,
				contentType:false,
				success: function(response){
					if(response.status == 'success'){
						alert('success: '+response.msg);
					}
					else{
						alert('Error: '+response.msg);
					}
				}/*,
				error: function(xhr, status, error){
					alert('Error: '+status+' '+error);
				}*/
			});
 	});
});
</script>
</head>

<body>
<div id="header">
<a href="./uploader.php"><i class="fa fa-cloud-upload fa-align-center" aria-hidden="true"></i> MUploader</a>
</div>

<div id="content">
	<div id="heading">Upload your files seamlessly</div>
	<a href="#"><div id="upload" class="button" title="Upload your files"><i class="fa fa-cloud-upload fa-align-center" aria-hidden="true"></i>
</div></a>
	<a href="view.php"><div id="view" class="button" title="View all files on my cloud"><i class="fa fa-eye fa-align-center" aria-hidden="true"></i>
</div></a>
</div>
<form id="fileupload" method="POST" enctype="multipart/form-data">
	<input type="file" multiple name="uploadfile[]" id="uploadfile" />
</form>
<div id="footer">
Made with <span class="fa fa-heart" aria-hidden="true"></span> for you
</div>
</body>
</html>