PHP計算器webrowser

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我一直在PHP中的面向對象編程計算器顯示的代碼，但是我有一個問題：每當我將它保存在Firefox中運行它，它這樣表示PHP計算器webrowser

棧代碼溢出要我添加一些說明，以便等等等等等等等等

的我一直使用的代碼是

<html> 
<body> 
<?php 
$page = $GET['page']; 

class calc{ 
    var $number1; 
    var $number2; 

     function add($number,$number2) 
     { 
      $result = $number1 + $number2; 
      echo("The sum of $number1 and $number2 is $result<br><br>"); 
      echo("$number1 + $number 2 = $result"); 
      exit; 
      } 

     function subtract($number1,$number2) 
     { 
      $result = $number1 - $number2; 
      echo("$number1 subtract $number2 is $result<br><br>"); 
      echo("$number1 - $number2 = $result"); 
      exit; 
      } 

     function multiply($number1,$number2) 
     { 
      $result = $number1 * $number2; 
      echo("$number1 multiplied by $number2 is $result<br><br>"); 
      echo("$number1 * $number2 = $result"); 
      exit; 
      } 

     function divide($number1,$number2) 
     { 
      $result = $number1/$number2; 
      echo("$number1 divided by $number2 is $result<br><br>"); 
      echo("$number1/$number2 = $result"); 
      exit; 
      } 
      } 
      $calc = new calc(); 
      ?> 

<title>php object oriented calculator</title> 
<form name="calc" action="?page=calc" method="POST"> 
Number 1: <input type=text name=value1><br> 
Number 2: <input type=text name=value2><br> 
Operation: <input type=radio name=oper value="add">Addition <input type=radio name=oper value="subtract">Subtraction <input type=radio name=oper value="divide">Division <input type=radio name=oper value="multiply">Multiplication</input><br> 
<input type=submit value="Calculate"> 
</form> 

<?php 
if($page == "calc"){ 
$number1 = $_POST['value1']; 
$number2 = $_POST['value2']; 
$oper = $_POST['oper']; 
    if(!$number1){ 
     echo("You must enter number 1!"); 
     exit; 
     } 
     if(!$number2){ 
      echo("You must enter number 2!"); 
      exit; 
      } 
     if(!$oper){ 
      echo("You must select an operation to do with the numbers!"); 
      exit; 
      } 
     if(!eregi("0-9", $number1)){ 
      echo("Number 1 MUST be numbers!"); 
      exit; 
      } 
     if(!eregi("0-9", $number2)){ 
      echo("Number 2 MUST be numbers!"); 
      exit; 
      } 
     if($oper == "add"){ 
      $calc->add($number1,$number2); 
      } 

     if $oper =="subtract"){ 
      $calc->subtract($number1,$number2); 
      } 
     if $oper = "multiply"){ 
      $calc->multiply($number1,$number2); 
      } 
     if $oper = "divide"){ 
      $calc->divide($number1,$number2); 
      } 
      } 
?> 
</body> 
</html>

來源

2013-07-23 user2611495

將相關代碼粘貼到此處，而不是pastebin。 –

將代碼放入標籤！ –

您沒有在代碼中的起始<？php標記，也沒有在代碼的最後一行結束？>標記。 – Maximus2012