Monitoring File Uploads using Ajax and PHP

Conclusion

At this stage all of the required code has been implemented, meaning you should now be able to upload a file using the index.php file. Assuming your code all works correctly, the status of the upload should be displayed while it is uploading. Note that small files may upload so quickly you don't see any real-time updates.

While the code we implemented in this article does gloss over a few things (such as informative error handling), hopefully it does demonstrate our primary goal: how to monitor the status of a file as it is being uploaded.

The key points covered in this article included:

• How to install APC and configure it correctly for upload monitoring
• How to retrieve upload data from APC
• How to develop a class using Prototype JavaScript library
• How to send JSON data with PHP and receive it using Ajax

Other Options

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• Read related articles:
  • Eight Weeks of Prototype: Week 5, Ajax with Prototype
  • Creating Sortable Lists With PHP And Ajax
  • Combining PHP, JSON and jQuery Screencast

Additional Files

• FileUploader.js
  (2KB)
• FileUploader.php
  (3KB)
• prototype.js
  (121KB)