PHP echo不打印A1 + A2 + A3的$ sum。谁知道为什么？我正在使用xampp。 [英] The PHP echo dont print out the $sum of A1+A2+A3. Anybody knowing why? I am using xampp.

问题描述

<DOCTYPE html>

   <title>Test
  <meta charset="UTF-8"/>

<center>
    <table border="1"><tbody><tr><td>Your name</td><td></td></tr><tr><td>Your E-mail address</td><td></td></tr><tr><td>Your E-mail address</td><td></td></tr></tbody></table>
   


</center>

---------------------------------------- --------------



PHP文件名为adding.php

------------------------------------------------------

The PHP file called adding.php

<?php  
if(isset($_POST['submit']))  
{
	$A1 = $_POST['A1'];
	$A2 = $_POST['A2'];
        $A3 = $_POST['A3'];  
  $sum = $A1+$A2+$A3;     

	echo "The sum is ".$sum;
	echo "Test";
}  
?>

< b>我尝试过的事情：



我已经完全不知所措了。谷歌一小时提示，但没有运气。

What I have tried:

I have don all that i can think off. Google an hour for hints, but with no luck.

推荐答案

_POST [' submit']））
{

_POST['submit'])) {

A1 =

A1 =

_POST [' A1'];

_POST['A1'];

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