简单的PHP计算器示例代码 发布时间：2023/10/11 使用表单输入两个数字和操作符，然后使用 switch 语句执行相应的操作，并在页面上显示结果。注意确保输入的数字是有效的，否则可能会导致错误。 <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>PHP Calculator</title> </head> <body> <form method="post"> <input type="text" name="num1" placeholder="Enter first number"> <select name="operator"> <option value="+">+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type="text" name="num2" placeholder="Enter second number"> <input type="submit" name="submit" value="Calculate"> </form> <?php if(isset($_POST['submit'])){ $num1 = $_POST['num1']; $num2 = $_POST['num2']; $operator = $_POST['operator']; switch ($operator) { case '+': $result = $num1 + $num2; break; case '-': $result = $num1 - $num2; break; case '*': $result = $num1 * $num2; break; case '/': $result = $num1 / $num2; break; default: $result = 0; break; } echo "<br>Result: " . $result; } ?> </body> </html>复制代码
