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【codekk源码解析】【soot源码】【surging源码】php计算器源码_php简单计算器代码

时间:2024-12-26 14:38:53 来源:kodi 源码输出 杂音 作者:fs shell源码

1.如何用PHP做的计算器吗

php计算器源码_php简单计算器代码

如何用PHP做的计算器吗

       <?计p简codekk源码解析php/

**

        * Created by PhpStorm.

        * User: ITAK

        * Date: /3/3

        * Time: :

        */

        error_reporting(E_ALL & ~E_NOTICE); if(isset($_POST['submit'])){ $ok = true; $error = "出现的问题:<br>"; if($_POST['num1'] == ""){ $ok = false; $error = $error."第一个数字不能为空<br>";

        } else{ if(!is_numeric($_POST['num1'])){ $ok = false; $error = $error."第一个数字不是数字<br>";

        }

        } if($_POST['num2'] == ""){ $ok = false; $error = $error."第二个数字不能为空<br>";

        } else{ if(!is_numeric($_POST['num2'])){ $ok = false; $error = $error."第二个数字不是数字<br>";

        }

        }

        } if($ok){ $sum = ""; $fuhao = $_POST['fuhao']; if($fuhao == '+') $sum = $_POST['num1'] + $_POST['num2']; if($fuhao == '-') $sum = $_POST['num1'] - $_POST['num2']; if($fuhao == '*') $sum = $_POST['num1'] * $_POST['num2']; if($fuhao == '/') $sum = $_POST['num1'] / $_POST['num2']; if($fuhao == '%') $sum = $_POST['num1'] % $_POST['num2'];

        } echo "<br>";?><html>

        <head>

        <meta charset="UTF-8">

        <title>简单计算器</title>

        </head>

        <body>

        <table border="0" width="" align="center">

        <form action="cal.php" method="post">

        <caption><h1>简单计算器</h1></caption>

        <tr>

        <td>

        <input type="text" size="5" name="num1" value="<?php echo $_POST['num1'] ?>"/>

        </td>

        <td>

        <select name="fuhao">//下拉列表 <option <?php if($_POST['fuhao']=="+") echo "selected"?>

        value="+"> + </option>

        <option <?php if($_POST['fuhao']=="-") echo "selected"?>

        value="-"> - </option>

        <option <?php if($_POST['fuhao']=="*") echo "selected"?>

        value="*"> * </option>

        <option <?php if($_POST['fuhao']=="/") echo "selected"?>

        value="/"> / </option>

        <option <?php if($_POST['fuhao']=="%") echo "selected"?>

        value="%"> % </option>

        </select>

        </td>

        <td>

        <input type="text" name="num2" size="5" value="<?php echo $_POST['num2'] ?>"/>

        </td>

        <td>

        = </td>

        <td>

        <input type="text" name="res" size="5" value="<?php echo $sum ?>"/>

        </td>

        </tr>

        <tr align="center">

        <td>

        <input type="submit" value="计算" name="submit">

        </td>

        </tr>

        <br>

        <tr>

        <td colspan="4">

        <?php

        if($ok){ echo "结果为: { $_POST['num1']} { $_POST['fuhao']} { $_POST['num2']} = { $sum}";} else{ echo $error;} ?>

        </td>

        </tr>

        </form>

        </table>

        </body></html>

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