php is used to realize adding subtracting multiplying and dividing calculator

  • 2020-12-07 03:59:20
  • OfStack

Use php to add, subtract, multiply and divide calculator. The code is simple!
 
<?php 
header("content-type:text/html;charset=utf-8"); 
session_start(); 
?> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" dir="ltr"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 
<title> Simple computer </title> 
</head> 
<body> 
<form action="jisuan.php" method="post"> 
 The first 1 The number of <input type="text" value="" name="num1"><br /> 
 Calculation of symbols <select name="oper"> 
<option value="+">+</option> 
<option value="-">-</option> 
<option value="*">*</option> 
<option value="/">/</option> 
</select><br /> 
 The first 2 The number of <input type="text" value="" name="num2"><br /> 
<input type="submit" value=" The calculation results "><br /> 
</form> 
</body> 
</html> 
<?php 
$num1=$_POST['num1']; 
$num2=$_POST['num2']; 
$oper=$_POST['oper']; 
$rs=0; 
switch($oper){ 
case "+": 
$rs=$num1+$num2; 
break; 
case "-": 
$rs=$num1-$num2; 
break; 
case "*": 
$rs=$num1*$num2; 
break; 
case "/": 
$rs=$num1/$num2; 
break; 
default: echo " You have not entered correctly "; 
} 
$_SESSION['rs']=$rs; 
echo ' The calculated results are as follows: '.$_SESSION['rs']; 
?> 

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