[Program] [PHP] online notepad 1

It took three days to create an online notebook using PHP + MySQL. I found some single-host notebooks online,
I rely on it. If it doesn't need a registration code, or it doesn't meet your own needs, then the standalone needs to be installed locally.
The main purpose is to create a todo list function. Currently, the supported functions are simple: add, delete, and count,
Upload files and use FCKeditor for editing. Some simple security measures are taken: HTML output by FCKeditor CodeSerialized,
Add simple code to prevent injection attacks and parse SQL statements to prevent SQL injection.