New posts in File Upload

Does changing an uploaded executable's file extension to .png render it safe?

Recreating uploads/linked images with imagecreatefrom* php

Making a Blacklist of filetypes to protect PHP application

PHP | Security for allowing user uploads

Is there a way to check the filetype of a file uploaded using PHP?

How does SFTP function without a manually generated public/private key pair

What does it mean to have a "file name with NULL bytes in serialized instances"?

Risks of a PHP image upload form

What is the next step of this file upload attack?

is it safe to allow external images to be attached to Blog or any Web content?