dailybird/add.php

## add.php
<?php

date_default_timezone_set('PRC');

$filename = 'messages.txt';
$username = $_POST['username'] ?? null;
$title = $_POST['title'] ?? null;
$content = $_POST['content'] ?? null;

if(!is_null($username) && !is_null($title) && !is_null($content)){
    $username = strip_tags($username);
    $title = strip_tags($title);
    $content = strip_tags($content);
    $time = date('Y/m/d H:i:s', time());

    $origin = file_get_contents($filename);
    if(strlen($origin) > 0){
        $messages = unserialize($origin);
    }else{
        $messages = [];
    }
    $content = compact('username', 'title', 'content', 'time');

    array_push($messages, $content);

    if(file_put_contents($filename, serialize($messages))){
        echo "<script>alert('添加成功');</script>";
        echo "<script>window.location.href = './index.php';</script>";
    }else{
        echo "<script>alert('添加失败，意外错误');</script>";
    }
}

?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>留言板 - 创建</title>

    <meta name="description" content="Source code generated using layoutit.com">
    <meta name="author" content="LayoutIt!">

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>

<div class="container">
    <div class="row">
        <div class="col-md-12">
            <div class="jumbotron well">
                <h2>
                    留言板 - 创建
                </h2>
                <p>
                    Say something
                </p>
            </div>
            <form role="form" action="add.php" method="post">
                <div class="form-group">

                    <label for="username">
                        用户名
                    </label>
                    <input type="text" class="form-control" name="username" required>
                </div>
                <div class="form-group">
                    <label for="title">
                        标题
                    </label>
                    <input type="text"  class="form-control" name="title" required>
                </div>

                <div class="form-group">

                    <label for="content">
                        内容
                    </label>
                    <textarea type="content" class="form-control" name="content" rows="10" required></textarea>
                </div>

                <button type="submit" class="btn btn-primary">
                    提交
                </button>

                <a type="submit" class="btn btn-default" href="./index.php">
                    查看留言
                </a>
            </form>
        </div>
    </div>
</div>

</body>
</html>

## delete.php
<?php
/**
 * Created by PhpStorm.
 * User: dailybird
 * Date: 17/4/8
 * Time: 下午7:44
 */

date_default_timezone_set('PRC');
$filename = 'messages.txt';

$id = $_GET['id'];

$messages = file_get_contents($filename);
$messagesArr = unserialize($messages);
unset($messagesArr[$id]);
if(file_put_contents($filename, serialize($messagesArr))){
    echo "<script>alert('删除成功');</script>";
    echo "<script>window.location.href = './index.php';</script>";
}else{
    echo "<script>alert('删除失败，未知错误');</script>";
    echo "<script>window.location.href = './index.php';</script>";
}

## edit.php
<?php
    date_default_timezone_set('PRC');
    $filename = 'messages.txt';

    $username = $_POST['username'] ?? null;
    $title = $_POST['title'] ?? null;
    $content = $_POST['content'] ?? null;
    $id = $_POST['id'] ?? null;

    if(!is_null($username) && !is_null($title) && !is_null($content) && !is_null($id)){
        $username = strip_tags($username);
        $title = strip_tags($title);
        $content = strip_tags($content);
        $time = date('Y/m/d H:i:s', time());

        $origin = file_get_contents($filename);
        if(strlen($origin) > 0){
            $messages = unserialize($origin);
            if(!is_null($messages[$id])){
                $messages[$id] = [
                    'username' => $username,
                    'title' => $title,
                    'content' => $content,
                    'time' => $time,
                ];
                if(file_put_contents($filename, serialize($messages))){
                    echo "<script>alert('编辑成功');</script>";
                    echo "<script>window.location.href = './index.php';</script>";
                }
            }
        }

        echo "<script>alert('所编辑内容不存在');</script>";
        echo "<script>window.location.href = './index.php';</script>";
    }else{
        // 未提交数据
        $id = $_GET['id'];

        if(is_null($id)){
            echo "<script>alert('所编辑内容不存在');</script>";
            echo "<script>window.location.href = './index.php';</script>";
        }

        if(file_exists($filename)){
            $messages = file_get_contents($filename);
            $messagesArr = unserialize($messages);

            $message = $messagesArr[$id];
        }

        if(is_null($message)){
            $message = [
                'username' => '',
                'title' => '',
                'content' => ''
            ];
        }
    }


//    if(file_put_contents($filename, serialize($messagesArr))){
//        echo "<script>alert('删除成功');</script>";
//        echo "<script>window.location.href = './index.php';</script>";
//    }else{
//        echo "<script>alert('删除失败，未知错误');</script>";
//        echo "<script>window.location.href = './index.php';</script>";
//    }

?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>留言板 - 编辑</title>

    <meta name="description" content="Source code generated using layoutit.com">
    <meta name="author" content="LayoutIt!">

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>

<div class="container">
    <div class="row">
        <div class="col-md-12">
            <div class="jumbotron well">
                <h2>
                    留言板 - 编辑
                </h2>
                <p>
                    Say something
                </p>
            </div>
            <form role="form" action="edit.php" method="post">
                <input type="hidden" name="id" value="<?php echo $id;?>">
                <div class="form-group">

                    <label for="username">
                        用户名
                    </label>
                    <input type="text" class="form-control" name="username" value="<?php echo $message['username'];?>">
                </div>
                <div class="form-group">

                    <label for="title">
                        标题
                    </label>
                    <input type="text" class="form-control" name="title" value="<?php echo $message['title'];?>">
                </div>

                <div class="form-group">

                    <label for="content">
                        内容
                    </label>
                    <textarea type="content" class="form-control" name="content" rows="10"><?php echo $message['username'];?></textarea>
                </div>

                <button type="submit" class="btn btn-primary">
                    编辑完成
                </button>

                <a type="submit" class="btn btn-default" href="./index.php">
                    查看留言
                </a>
            </form>
        </div>
    </div>
</div>

</body>
</html>

## index.php
<?php
    header('Content-type:text/html; charset=urf-8');
    $filename = 'messages.txt';
    if(file_exists($filename)){
        $messages = file_get_contents($filename);
        if(strlen($messages) > 0){
            $messagesArr = unserialize($messages);
        }else{
            $messagesArr = [];
        }
    }
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>留言板</title>

    <meta name="description" content="Source code generated using layoutit.com">
    <meta name="author" content="LayoutIt!">

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>

<div class="container">
    <div class="row">
        <div class="col-md-12">
            <div class="jumbotron well">
                <h2>
                    留言板
                </h2>
                <p>
                    Say something
                </p>
            </div>
            <table class="table table-bordered table-hover">
                <thead>
                <tr>
                    <th width="15%">
                        编号
                    </th>
                    <th width="15%">
                        用户
                    </th>
                    <th width="15%">
                        标题
                    </th>
                    <th width="20%">
                        时间
                    </th>
                    <th width="20%">
                        内容
                    </th>
                    <th width="15%">
                        操作
                    </th>
                </tr>
                </thead>
                <tbody>
                <?php $i = 0; foreach ($messagesArr as $index => $message):?>
                <tr>
                    <td>
                        <?php echo intval(++$i);?>
                    </td>
                    <td>
                        <?php echo $message['username'];?>
                    </td>
                    <td>
                        <?php echo $message['title'];?>
                    </td>
                    <td>
                        <?php echo $message['time'];?>
                    </td>
                    <td>
                        <?php echo $message['content'];?>
                    </td>
                    <td>
                        <a href="./edit.php?id=<?php echo $index; ?>">编辑</a>
                        <a onclick="if(!confirm('确认删除？')) return false;" href="./delete.php?id=<?php echo $index; ?>">删除</a>
                    </td>
                </tr>
                <?php endforeach?>

                </tbody>
            </table>
            <a type="button" class="btn btn-primary btn-block" href="./add.php">
                我要留言
            </a>
        </div>
    </div>
</div>


</body>
</html>
	<?php

	date_default_timezone_set('PRC');

	$filename = 'messages.txt';
	$username = $_POST['username'] ?? null;
	$title = $_POST['title'] ?? null;
	$content = $_POST['content'] ?? null;

	if(!is_null($username) && !is_null($title) && !is_null($content)){
	$username = strip_tags($username);
	$title = strip_tags($title);
	$content = strip_tags($content);
	$time = date('Y/m/d H:i:s', time());

	$origin = file_get_contents($filename);
	if(strlen($origin) > 0){
	$messages = unserialize($origin);
	}else{
	$messages = [];
	}
	$content = compact('username', 'title', 'content', 'time');

	array_push($messages, $content);

	if(file_put_contents($filename, serialize($messages))){
	echo "<script>alert('添加成功');</script>";
	echo "<script>window.location.href = './index.php';</script>";
	}else{
	echo "<script>alert('添加失败，意外错误');</script>";
	}
	}

	?>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<title>留言板 - 创建</title>

	<meta name="description" content="Source code generated using layoutit.com">
	<meta name="author" content="LayoutIt!">

	<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

	</head>
	<body>

	<div class="container">
	<div class="row">
	<div class="col-md-12">
	<div class="jumbotron well">
	<h2>
	留言板 - 创建
	</h2>
	<p>
	Say something
	</p>
	</div>
	<form role="form" action="add.php" method="post">
	<div class="form-group">

	<label for="username">
	用户名
	</label>
	<input type="text" class="form-control" name="username" required>
	</div>
	<div class="form-group">
	<label for="title">
	标题
	</label>
	<input type="text" class="form-control" name="title" required>
	</div>

	<div class="form-group">

	<label for="content">
	内容
	</label>
	<textarea type="content" class="form-control" name="content" rows="10" required></textarea>
	</div>

	<button type="submit" class="btn btn-primary">
	提交
	</button>

	<a type="submit" class="btn btn-default" href="./index.php">
	查看留言
	</a>
	</form>
	</div>
	</div>
	</div>

	</body>
	</html>
	<?php
	header('Content-type:text/html; charset=urf-8');
	$filename = 'messages.txt';
	if(file_exists($filename)){
	$messages = file_get_contents($filename);
	if(strlen($messages) > 0){
	$messagesArr = unserialize($messages);
	}else{
	$messagesArr = [];
	}
	}
	?>

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<title>留言板</title>

	<meta name="description" content="Source code generated using layoutit.com">
	<meta name="author" content="LayoutIt!">

	<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

	</head>
	<body>

	<div class="container">
	<div class="row">
	<div class="col-md-12">
	<div class="jumbotron well">
	<h2>
	留言板
	</h2>
	<p>
	Say something
	</p>
	</div>
	<table class="table table-bordered table-hover">
	<thead>
	<tr>
	<th width="15%">
	编号
	</th>
	<th width="15%">
	用户
	</th>
	<th width="15%">
	标题
	</th>
	<th width="20%">
	时间
	</th>
	<th width="20%">
	内容
	</th>
	<th width="15%">
	操作
	</th>
	</tr>
	</thead>
	<tbody>
	<?php $i = 0; foreach ($messagesArr as $index => $message):?>
	<tr>
	<td>
	<?php echo intval(++$i);?>
	</td>
	<td>
	<?php echo $message['username'];?>
	</td>
	<td>
	<?php echo $message['title'];?>
	</td>
	<td>
	<?php echo $message['time'];?>
	</td>
	<td>
	<?php echo $message['content'];?>
	</td>
	<td>
	<a href="./edit.php?id=<?php echo $index; ?>">编辑</a>
	<a onclick="if(!confirm('确认删除？')) return false;" href="./delete.php?id=<?php echo $index; ?>">删除</a>
	</td>
	</tr>
	<?php endforeach?>

	</tbody>
	</table>
	<a type="button" class="btn btn-primary btn-block" href="./add.php">
	我要留言
	</a>
	</div>
	</div>
	</div>


	</body>
	</html>