php教程:简单计算器代码案例
运行代码:
- <?php
- if(isset($_POST['submit'])){
- $left = $_POST['left'];
- $right =$_POST['right'];
- if($left =='' || !is_numeric($left) || $right =='' || !is_numeric($right)){
- echo '请输入数字';
- }else{
- switch($_POST['fuhao']){
- case '1':
- $sub = $left + $right;
- break;
- case '2':
- $sub = $left - $right;
- break;
- case '3':
- $sub = $left * $right;
- break;
- default:
- $sub = $left / $right;
- }
- }
- }
- ?>
- <form action="" method="post">
- <input type="text" name="left" value="<?php echo $left ?>">
- <select name="fuhao" id="">
- <option value="1" selected>+</option>
- <option value="2">-</option>
- <option value="3">*</option>
- <option value="4">/</option>
- </select>
- <input type="text" name="right" value="<?php echo $right ?>">
- <input type="submit" value="=" name="submit">
- <input type="text" value="<?php echo $sub ?>">
- </form>
复制代码
|
|