Calculation result in same form?

[rls669]

Sorry for this total noob question. I want to have the user enter a few numbers into a form, press the submit button, then have the result displayed in a box next to the original input. I also want to separate the html and the php script in separate files so I can have several of these simple calculators on the same page, each with its own submit and clear button. Using the html form below, I can get the info into the script but I don't know how to output it back to the form. All the simple example calculators use something like echo $result which puts the output on a new page.

<FORM METHOD="POST" ACTION = "PHP/calculate.php">
<P>first_num:<INPUT TYPE="text" NAME="first_num" SIZE = 6></P>

<P>second_num:<INPUT TYPE="text" NAME="second_num" SIZE = 6></P>

<P><INPUT TYPE="submit" NAME="submit" VALUE="Calculate"></P>

<P><INPUT TYPE="reset" VALUE="Clear"></P>
</FORM>

[JPnyc]

Why not use javascript for that? It's clientside so doesn't require a needless trip to the server.

[Frederick]

Direct the form back to itself and use the $POST globals.

<FORM METHOD="POST" ACTION = "calculate.php"> 
<P>first_num:<INPUT TYPE="text" NAME="first_num" VALUE="<?php echo $_POST["first_num"];?>" SIZE = 6></P> 

<P>second_num:<INPUT TYPE="text" NAME="second_num" VALUE="<?php echo $_POST["second_num"];?>" SIZE = 6></P> 

<P><INPUT TYPE="submit" NAME="submit" VALUE="Calculate"></P> 

<P><INPUT TYPE="reset" VALUE="Clear"></P> 
</FORM>
<?php
$first_num = $_POST["first_num"];
$second_num = $_POST["second_num"];

echo $first_num."<br".$second_num;
?>

That should get you started.

[rls669]

Thanks, I'll give it a shot.