PHP script output not shown in Firefox

Question

The output following HTML doesn't show the output of echo from the PHP script on Firefox. What is the problem?

<!DOCTYPE html>
<html>  
<body>  
<form method="post">  
Enter First Number:  
<input type="number" name="number1" /><br><br>  
Enter Second Number:  
<input type="number" name="number2" /><br><br>  
<input  type="submit" name="submit" value="Add">  
</form>  
<?php  
    if(isset($_POST['submit']))  
    {  
        $number1 = $_POST['number1'];  
        $number2 = $_POST['number2'];  
        $sum =  $number1+$number2;     
echo "The sum of $number1 and $number2 is: ".$sum;   
}  
?>  
</body>  
</html>

This is the page that i see as i click on the Add button:

So basically nothing happens, and i get back to the original page.

I am using Firefox version 69.0.1 on Debian and using XAMPP as my local testing server.

Works for me in firefox. What version, what os, what is the output in ff? — Brett Gregson, Oct 01 '19 at 07:48
What do you see if you do "view page source"? As far as I can tell by looking at the code, I don't see any reason for it not to work. — M. Eriksson, Oct 01 '19 at 07:49
Also NEVER call anything in a form "submit" if you ever want JavaScript to interact with the submit event — mplungjan, Oct 01 '19 at 07:54

score 0 · Answer 1 · answered Oct 01 '19 at 07:56

Works good for me in Firefox. Using XAMPP As Server

Try Changing your HTML code to the following:

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<form method="post">
    Enter First Number:
    <input type="number" name="number1" /><br><br>
    Enter Second Number:
    <input type="number" name="number2" /><br><br>
    <input  type="submit" name="submit" value="Add">
</form>
<?php
if(isset($_POST['submit']))
{
    $number1 = $_POST['number1'];
    $number2 = $_POST['number2'];
    $sum =  $number1+$number2;
    echo "The sum of $number1 and $number2 is: ".$sum;
}
?>
</body>
</html>

This is not an answer. What did you change that made OPs problem go away? Also never call anything "submit" in a form — mplungjan, Oct 01 '19 at 07:56

PHP script output not shown in Firefox

1 Answers1