How to input another value with looping statement in PHP? - php

Question

Hello I am new to programming and I am having a hard time with this. Can someone please give me a tip or help with my code?
The user will be asked if they want to input another value and if they click the "yes button", a text field will show wherein the user will input another value. Or the button can redirect them to the process page again to input another value, something like that. It must be done using looping statement. I tried do while loop but it doesn't seem to work or maybe I am doing wrong. Any help or tip is appreciated.
This is my code on button:
<?php
if(isset($_POST['f-value'])):
$total=($_POST['f-value']-32)*5/9;
echo round($total, 3) . " celcius";
endif;
?>
<?php
if(isset($_POST['base'])):
$areat = 1/2 * $_POST['base'] * $_POST['height'];
echo "The Area of a Triangle is ";
echo round($areat, 3);
endif;
?>
<?php
if(isset($_POST['length'])):
$perimeter=($_POST['length']+$_POST['width'])*2;
echo "The Perimeter of the Rectangle is ";
echo round ($perimeter,4);
endif;
?>
<?php
if(isset($_POST['radius'])):
$Pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067;
$diameter= ($_POST['radius'] * 2);
$areac= $Pi * $_POST['radius'] * $_POST['radius'];
$circum= 2 * $Pi * $_POST['radius'];
echo "The Area of the Circle is ";
echo $_POST['radius'];
echo round($areac,3);
echo "<br>The Circumference of the Circle is ";
echo round($circum,3);
echo "<br>The Diameter of the Circle is ";
echo round($diameter,3);
endif;
?>
<form action="process.php" method="post">
Input again?: <input type="submit" value="Yes" name="yes">
<input type="submit" value="No" name="no">
</form>
This is my code on PHP process file:
<?php
function formFunction(){
if(isset($_POST['formula'])):
$selection=$_POST['formula'];
switch($selection):
case 'default':
echo "Please select a formula";
break;
case '1':?>
<form action="output.php" method="post">
Radius: <input type="text" name="radius">
<input type="submit" value="Compute">
</form>
<?php
break;
case '2':?>
<form action="output.php" method="post">
Fahrenheit: <input type="text" name="f-value">
<input type="submit" value="Compute">
</form>
<?php
break;
case '3':?>
<form action="output.php" method="post">
Base: <input type="text" name="base">
Height: <input type="text" name="height">
<input type="submit" value="Compute">
</form>
<?php break;
case '4':?>
<form action="output.php" method="post">
Length: <input type="text" name="length">
Width: <input type="text" name="width">
<input type="submit" value="Compute">
</form>
<?php break;
endswitch;
endif;}?>
<?php
//I tried looping here but doesn't seem to work fine. It works but it displays infinite loop or it doesn't display at all
?>

Answer 1

add these blocks of code in process.php
if(isset($_POST['yes'])) :
header("Location: https://file_path.php");
die();
endif;
if(isset($_POST['no'])):
echo "Thank You!";
endif;
here, in header write your file path where you want to redirect like if you are using localhost than header("Location: localhost/folder_name/file_name.php");
if still you have queries comment down i will help you out till i can