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  • PHP做的简单计算器

    使用php做的简易计算器

    能够进行+,-,*,/运算.

    如下图

    <?php 
        if (isset($_POST['button'])) {
            $num1 = $_POST['num1'];
            $num2 = $_POST['num2'];
            $op = $_POST['op'];
            switch ($_POST['op']) {
                case '+':    
                    $result = $num1 + $num2;
                    break;
                case '-':    
                    $result = $num1 - $num2;
                    break;
                case '*':    
                    $result = $num1 * $num2;
                    break;
                case '/':    
                    $result = $num1 / $num2;
                    break;
            }
            echo <<<str
            <script type="text/javascript">
                 window.onload=function(){
                     document.getElementById('num1').value = '$num1';
                     document.getElementById('op').value = '$op';
                     document.getElementById('num2').value = '$num2';
                 document.getElementById('result').value = '$result';
         }
         </script>
    str;
        }
    
     ?>
    
    <body>
    <form method="post" action="">
        <input type="text" name="num1" id="num1">
        <select name="op" id="op">
            <option value="+">+</option>
            <option value="-">-</option>
            <option value="*">*</option>
            <option value="/">/</option>
        </select>
        <input type="text" name="num2" id="num2">
        <input type="submit" name="button" value="=">
        <input type="text" name="result" id="result">
    </form>
    </body>
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  • 原文地址:https://www.cnblogs.com/wjw9/p/10962739.html
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