[MySqli扩展]①③--评论系统、表单输入过滤

Paste_Image.png

http://img.mukewang.com/down/55fa763b0001745800000000.rar

index.php

<?php

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
    <title>Document</title>
    <link rel="stylesheet" type="text/css" href="style/style.css" />
</head>
<body>
<h1>慕课网评论系统</h1>
<div id='main'>
    <?php
//    foreach($comments as $val){
//        echo $val->output();
//    }
    ?>
    <div id='addCommentContainer'>
        <form id="addCommentForm" method="post" action="">
            <div>
                <label for="username">昵称</label>
                <input type="text" name="username" id="username" required='required' placeholder='请输入您的昵称'/>

                <label for="face">头像</label>
                <div id='face'>
                    <input type="radio" name="face" checked='checked' value="1" />![](img/1.jpg)   
                    <input type="radio" name="face"  value="2" />![](img/2.jpg)   
                    <input type="radio" name="face"  value="3" />![](img/3.jpg)   
                    <input type="radio" name="face"  value="4" />![](img/4.jpg)   
                    <input type="radio" name="face"  value="5" />![](img/5.jpg)   
                </div>
                <label for="email">邮箱</label>
                <input type="email" name="email" id="email" required='required' placeholder='请输入合法邮箱'/>

                <label for="url">个人博客</label>
                <input type="url" name="url" id="url" />

                <label for="content">评论内容</label>
                <textarea name="content" id="content" cols="20" rows="5" required='required' placeholder='请输入您的评论...'></textarea>
                <input type="submit" id="submit" value="发布评论" />
            </div>
        </form>
    </div>
</div>
<script type="text/javascript" src="script/jquery.min.js"></script>
<script type="text/javascript" src="script/comment.js"></script>
</body>
</html>

doAction.php

<?php
header("Content-type:text/html;charset=utf-8");
require_once 'connect.php';
require_once 'comment.class.php';
?>

connect.php

<?php
$mysqli = new mysqli('localhost', 'root', '', 'imoocComment');
if ($mysqli->errno) {
    die('CONNECT ERROR ' . $mysqli->error);
} else {
    $mysqli->set_charset('UTF8');
}

cpmment.class.php

<?php

class Comment
{
    private $data = array();

    function __construct($data)
    {
        $this->data = $data;
    }

    /**
     * 检测用户输入的数据
     * @param $arr
     * @return bool
     */
    public static function validate(&$arr)
    {
        if (!(filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL))) {
            $errors['email'] = '请输入合法邮箱';
        }
        if (!(filter_input(INPUT_POST, 'url', FILTER_VALIDATE_URL))) {
            $url = "";
        }
        if (!(filter_input(INPUT_POST, 'content', FILTER_CALLBACK, array('options' => 'Comment::validate_str')))) {
            $errors['content'] = "请输入合法内容";
        }
        if (!(filter_input(INPUT_POST, 'username', FILTER_CALLBACK, array('options' => 'Comment::validate_str')))) {
            $errors['username'] = "请输入合法用户名";
        }
        $options = array(
            'min_range' => 1,
            'max_range' => 5
        );
        if (!(filter_input(INPUT_POST, 'face', FILTER_VALIDATE_INT, $options))) {
            $errors['face'] = "请输入合法头像";
        }
        if (!empty($errors)) {
            $arr = $errors;
            return false;
        }
        $arr = $data;
        $arr['email'] = strtolower(trim($arr['email']));
        return true;

    }

    /**
     * 过滤用户输入的特殊字符
     * @param $str
     * @return bool|string
     */
    public static function validate_str($str)
    {
        if (mb_strlen($str, 'UTF8') < 1) {
            return false;
        }
        //nl2br 将\n转换成br
        //htmlspecialchars 把一些预定义的字符转换为 HTML 实体
        //ENT_QUOTES单引号也转义
        $str = nl2br(htmlspecialchars($str, ENT_QUOTES));
        return $str;

    }
}
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