how do i use post method in this code instead of get method?

Question

https://code.sololearn.com/WdWbqtffLEtm/?ref=app

Answer 1

you have to change the form tag attributes to something like.....

<form method="post" action="$_SERVER['PHP_SELF']">

Answer 2

"form" tag has an "method" attribute that is used for your case:
<form method="POST" >...
But its unuseful if you dont set "action" attribute