php实现数据粘性例子

　　例子??

<meta charset="utf-8">
<?php
/**
 * Created by PhpStorm.
 * User: huangjiaming
 * Date: 16/7/18
 * Time: 下午5:15
 */
if(isset($_POST[‘submit‘])) {
    @$fan = $_POST[‘fan‘];
    @$email = $_POST[‘email‘];
    $output_form = false;

    if (empty($fan) && empty($email)) {
        echo "邮箱和反馈不能为空";
        $output_form = true;
    }
    if (!empty($fan) && empty($email)) {
        echo "邮箱不能为空";
        $output_form = true;
    }
    if (!empty($email) && empty($fan)) {
        echo "反馈不能为空";
        $output_form = true;
    }
}
else{
    $output_form = true;
}
if($output_form) {
    ?>

    <form action="<?php echo $_SERVER[‘PHP_SELF‘] ?>" method="post">
        <label for="email"> 邮箱：</label>
       <input type="text" id="email" name="email" value="<?php echo @$email; ?>" /><br/>
        <label for="fan"> 反馈：</label>
        <input type="text" id="fan" value="<?php echo @$fan; ?>" name="fan" />
        <input type="submit" value="sure" name="submit">
    </form>

    <?php

}
    ?>