copy user input from html as variable

Hello guys,

I created a very simple html code into a page (see below) where the user will input a text, I need to get that text the user inputs from that form as a variable so I can use it for another code, is this possible? can you give me an example?


<form action="/getpayoutstatus_list.php" method="post">
<label>
Created After
</label>
<input type="text" name="createdafter" value="1900-01-01">
<input type="submit" name="submit" value="submit">
</form>

Many thanks!