Block PHP Uploads

How can you block php uploads in WordPress? This use case shows how a focused WordPress code snippet can handle the task without installing a heavy plugin. The snippet should block PHP files from being uploaded to Media Library and produce this result: Uploads with .php extension are rejected by WordPress. You can also log in to LeonLab.ai, describe this WordPress use case in plain English, generate the snippet, review the PHP code, and deploy it to the selected WordPress project.