After a series of mistakes and help from internet feeds, finally I made my own first form validation and yes it's my first post as well.
I hope you will like guys.
https://code.sololearn.com/WUz2XcH0631E/#html
bettter to do input filtering and validation on the backend to avoid issues from xss.
Don't allow special chars to be input, in order to avoid sql injection.
see the w3schools php form example
