After battling a deceitful ad that duped my dad into installing numerous PDF apps on his phone, I have a few bones to pick.

PHP-malware-finder does its very best to detect obfuscated/dodgy code as well as files using PHP functions often used in malwares/webshells. or replace the last 2 ...

There's too many code snippets on the Internet on how to do this, but not enough libraries. This will allow you to download files of any size using cURL without ever running out of memory. That's it.