Creating a Upload/Download System Using PHP Classes

Sunday, August 29th, 2010

Making a PHP upload script can be a very challenging task when you are just starting out, heck; it’s still hard to some extent when you are an experienced developer. So today, I’m going to show you how to make one using PHP5 Classes and a simple form. In the script we will be able to upload files with certain file extensions and set a limit to the size of the file we want to upload. This will all go along with a sharing link and a force download script. If you want an easier file upload client, try YouSendIt.

The Basic Upload Form

First we are going to start out just by making our upload form where we will be able to select a file and then press the upload button to upload the file into our certain directory we will define. It is quite basic so you can just copy and paste it.

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" enctype="multipart/form-data" method="post">
<input name="file" type="file" />
<input type="submit" value="Upload" /> </form>

Developing the Upload Class

The Class and Variables

Now we need to start on the server side part of our project. We need to start by defining a simple class with the name of “Upload”. Inside of that we are going to want to have 3 protected variables; $path, $max_file_length, and $extensions. Our $path variable is going to be the relative path to the upload directory. Our $max_file_size variable will be our maximum allowed file size in megabytes and our $extensions variable will be (more…)

Tags: code, download, html, php, programming, Resources, Tutorials, upload, web design
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