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php-15002050125
/
cal.php

<?php
/**
 * Created by PhpStorm.
 * User: User
 * Date: 2017/9/20
 * Time: 9:06
 */
?>
<html>
<body>
<form action="test.php" method="post">
    <input type="text" name="first" />
    <select name="s">
        <option value="+">+</option>
        <option value="-">-</option>
        <option value="*">*</option>
        <option value="%">%</option>
        <option value="/">/</option>s
    </select>
    <input type="text" name="second" />
    <input type="submit" value="计算" />
</form>
</body>
</html>