Abstract: 把新闻信息，用户信息存放在文件中，用对文件的读写，实现用户的登录注册以及对新闻的增删改查。

一、目录结构

###目录结构：

| index.php //初始化页面

|——– data //文件存放目录

| news.db //存放新闻信息文件

| users.db //存放用户信息文件

|——— lib //脚本存放目录

| login.html // 用户登录界面

| checklogin.php //处理用户登录信息

| logup.html //用户注册界面

| checkSignUp.php //处理用户注册信息

| addNews.php //添加新闻界面

| del.php //删除新闻界面

| upload.php //上传头像界面

| getpasswd.php //修改密码界面

| checkpass.php //对hgetpasswd.php发送的数据进行处理

|——– css //用户登录和注册界面的css目录

| login.css //用户登录的css

| logup.css //用户注册的css

|——– upload //用户上传头像目录

|——– basedir //存放页面头部尾部和一些公共函数

| header.php //页面头部

| footer.php //页面尾部

| function.php //定义了一些公共函数

二、新闻界面 index.php

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<?php
session_start();
?>
<html>
<head>
    <meta charset="UTF-8">
    <title>news</title>
</head>
<body>
<br>
<!--区分普通用户和管理员用户-->
<?php
	if(isset($_SESSION['uname'])){
    	echo <<<EOF
    	<div>
        	<img src="../images/logo.png" height="100px" width="100px" style="float: left">
    	</div>
    	<div style="float: right">
        	<img src='../upload/headimg.jpg' height="60px" width="60px">
        <br>
        <a href="../logout.php">注销用户</a>
    	</div>
EOF;
}
?>
<h1 align="center">ICQ新闻中心</h1>
<hr>
<table align="center">
    <tr>
        <th>热度</th>
        <th>标题</th>
        <th>作者</th>
        <th>时间</th>
    </tr>
    <?php
        //用只读方式打开news.db文件
        $fhandle = fopen("./data/news1.db", "r");
        //设置一个计数器，小于3时，每个文章标题下面增加图片和简介
        $top3Cnt=1;
        while(!feof($fhandle)) {
            $fline = fgets($fhandle);
            $data = explode('||', $fline);
            @$title = base64_decode($data[1]);
            @$content = base64_decode($data[2]);
            @$date = $data[3];
            @$author = base64_decode($data[4]);
            @$hot = $data[5];
            @$imgUrl = $data[6];
            echo <<<EOF
        <tr align="center">
            <td>$hot</td>
            <td><a href="myl.php">$title</a></td>
            <td>$author</td>
            <td>$date</td>
        </tr>
EOF;
        //新闻前三个显示图片和简介  
        if($top3Cnt<=3){
            $tmpContent = mb_substr(base64_decode($data[2]), 0,50);
            echo <<<EOF
            <tr>
                <td><img src="$imgUrl" height="80" width="80"></td>
                <td colspan='4'><b>内容简介：</b>$tmpContent</td>
            </tr>
EOF;
        }
        $top3Cnt++;
        }
    ?>
</table>
</body>
</html>

普通用户显示界面：

管理员用户显示界面：

三、用户登录和用户注册

1.login.html

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>登录页面</title>
    <link rel="stylesheet" type="text/css" href="css/login.css">
</head>
<body>
<div class="box"> 
    <div class="top">
        <h1>登录</h1>
    </div>
    <form action="checklogin.php" method="post">
        
        <input type="text" name="username" placeholder="手机号/邮箱/用户名">
        <br>
        <input type="password" name="password" placeholder="密码">
        <br>
        <input class="input_code" type="text" name="verifycode" placeholder="验证码">
        <img class="verifycode" src="https://passport.360.cn/captcha.php?m=create&app=i360&scene=login&userip=&level=default&sign=8820a4&r=1564540365&border=none&_=1564540365972">
        <br>
        <a class="signup" href="logup.html">注册账号</a>
        <a class="getpass" href="./tmp/getpasswd.php">忘记密码</a>
        <br>
        <input class="login" type="submit" name="submit" value="登录">
    </form>
</div>
</body>
</html>

2.checklogin.php

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<?php
    session_start();
?>
<html>
<head>
    <title>
        登录
    </title>
</head>
<body>
<?php
$fhandle = fopen('./data/users.db', 'r');
while(!feof($fhandle)) {
    $InMes = fgets($fhandle);
    $mesArray = explode('||', $InMes);
    if(count($mesArray)!=2){
        continue;
    }
    if(trim($mesArray[0])==$_POST['username'] && trim($mesArray[1])==$_POST['password']){
        $_SESSION['uname'] = $_POST['username'];
        echo "正在进入后台";
        echo <<<EOF
        <script>location.href="./data/addNews.php"</script>
EOF;
        $flag=0;
        break;
    }
    $flag = 1;
}
if($flag==1){
    echo "<script>alert('账号或密码错误！重新输入。')</script>";
    echo "<script>history.back()</script>";
}
?>
</div>
</body>
</html>

登录成功界面：

登录失败界面：

3. checklogup.php

logup.html与login.html程序接近

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<?php
session_start();
$fhandle = fopen('./data/users.db', 'a+');
$userMes = array();
$storeMes = array();
@$userMes[0] = $_POST['username'];
@$userMes[1]=$_POST['password'];
@$userMes[2]=$_POST['checkpasswd'];
if(strcmp($userMes[1], $userMes[2])!=0){
    echo "<script>alert('两次输出密码不同！请重新输入！')</script>";
    echo "<script>history.back()</script>";
}
else {
    $storeMes[0] = $userMes[0];
    $storeMes[1] = $userMes[1];
    $inMes = implode('||', $storeMes);
    if (count($userMes) == 3) {
        fputs($fhandle, $inMes . "\n");
        fclose($fhandle);
        echo "<script>alert('用户注册成功')</script>";
        echo "<script>location.href='login.html'</script>";
        $_SESSION['uname'] = $_POST['username'];
    }
}
?>

用户注册失败：

用户注册成功：

四、新闻的增删改查

1. 添加新闻 addNews.php

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<!--添加头部信息-->
<?php include '../basedir/header.php'; include '../basedir/function.php';?>
<div align="center">
    <?php
        if($_SESSION['uname']==NULL) {
            echo "<script>alert('请登录'); location.href='../login.html'</script>";
            die("请登录");
        }
    ?>
    <a href="upload.php">上传头像</a>       &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="del.php">删除新闻</a>      &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="getpasswd.php">修改密码</a>
</div>
<br><br><br>
<div align="center">
    <form action="addNews.php" method="post">
        <?php
            if($_SESSION['uname']==NULL)
                echo "<script>alert('请登录'); location.href='../login.html'</script>";
                die("请登录");
        ?>
        <input type="text" name="title" placeholder="文章标题"><br>
        <br>
        <input type="number" name="hot" placeholder="热度"><br>
        <br>
        <input type="text" name="imgUrl"><br>
        <br>
        <textarea name="content" cols="100" rows="50" placeholder="文章内容"></textarea><br>
        <input type="submit" name="submit" value="提交">
    </form>
</div>
<?php
    $fhandle = fopen('../data/news2.db', 'a');
    $t = time();
    $arrMes = array();
    @$arrMes[0] = computerId('../data/news2.db')+1;
    @$arrMes[1] = base64_encode($_POST['title']);
    @$arrMes[2] = base64_encode($_POST['content']);
    @$arrMes[3] = date("Y-m-d", $t);
    @$arrMes[4] = base64_encode($_SESSION["username"]);
    @$arrMes[5] = $_POST['hot'];
    @$arrMes[6] = $_POST['imgUrl'];
    if (count($arrMes) == 7) {
        $writeMes = implode('||', $arrMes);
        $fline = fputs($fhandle, $writeMes."\n");
        if ($fline != flase) {
            echo "<script>alert(\"新闻添加成功！\")</script>";
            echo "<a href='../index.php'>点击查看</a>";
        }
    }
    fclose($fhandle);
?>
<!--添加尾部信息-->
<?php include "../basedir/footer.php";?>

添加新闻页面：

2. 删除新闻 del.php

思路：每条新闻对应一个id号，通过输入id判断要删除的新闻，程序循环读取文件每一行数据，再通过字符串函数把id号取出，若id不匹配把每行数据push到一个数组里面，若相等则跳过。然后再通过for循环把存入数据的数组以w格式重新写入文件即可。

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<?php include '../basedir/header.php'; include '../basedir/function.php';?>
    <?php
    if($_SESSION['uname']==NULL)
        echo "<script>alert('请登录'); location.href='../login.html'</script>";
    ?>
    <div align="center">
        <a href="upload.php">上传头像</a>       &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
        <a href="../data/addNews.php">添加新闻</a>      &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
        <a href="getpasswd.php">修改密码</a>
        <br><br><br>
        <form action="del.php" method="post">
            <input type="text" name="id" placeholder="请输入要删除文章的编号">
            <input type="submit" name="submit" value="提交">
        </form>
        <a href="../index.php" target="_blank">点击查看</a>
    </div>
<table>
    <table align="center">
        <tr>
            <th>标号</th>
            <th>标题</th>
            <th>作者</th>
        </tr>
        <?php
            $f = fopen('../data/news1.db', 'r');
            while(!feof($f)){
                $fline = fgets($f);
                $data = explode('||', $fline);
                @$artId = $data[0];
                @$title = base64_decode($data[1]);
                @$author = base64_decode($data[4]);
                echo <<<EOF
                <tr align="center">
                    <td>$artId</td>
                    <td>$title</td>
                    <td>$author</td> 
                </tr>
EOF;
            }
        ?>
</table>

<?php
    @$id = $_POST['id'];
    $fhandle = fopen('../data/news1.db', 'r');
    $transArr = array();
    while(!feof($fhandle)){
        $fline = fgets($fhandle);
        $tmpLine = explode('||', $fline);
        if($tmpLine[0] == $id){
            continue;
        }
        array_push($transArr, $tmpLine);
    }
    fclose($fhandle);
    for($i=0; $i<count($transArr); $i++) {
        echo "<br>";
    }
    echo "<br>";

    $fhandle = fopen('../data/news1.db', 'w');
    for($i=0; $i<count($transArr); $i++) {
        if(count($transArr[$i])==7) {
            $transArr[$i][0] = $i + 1;
            $str = implode('||', $transArr[$i]);
            if($str=="\n"){
                continue;
            }
            fputs($fhandle, $str);
        }
    }
    if(isset($_POST['id'])) {
        if (count($transArr) == computerId('../data/news1.db')) {
            echo "<script>alert('删除成功'); location.href='../tmp/del.php';</script>";
        }
    }
    fclose($fhandle);
?>
<?php include "../basedir/footer.php";?>

添加好新闻后，点击删除新闻可以进入删除新闻界面

3. 修改密码

getpasswd.php

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<?php include '../basedir/header.php'; include '../basedir/function.php';?>
<div align="center">
    <?php
    if($_SESSION['uname']==NULL) {
        echo "<script>alert('请登录'); location.href='../login.html'</script>";
        die("请登录");
    }
    ?>
    <a href="upload.php">上传头像</a>       &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="../data/addNews.php">添加新闻</a>      &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="del.php">删除新闻</a>
    <br><br><br>
    <form action="checkpass.php" method="post">
        <label>输入旧密码：</label><input type="text" name="oldpasswd">
        <label>输入新密码：</label><input type="text" name="newpasswd">
        <label>确认密码：</label><input type="text" name="checknewpasswd">
        <input type="submit" name="submit" value="提交">
    </form>
</div>
<?php include "../basedir/footer.php";?>

checkpass.php

思路：先把每行数据读出存到一个数组里，用户名匹配成功后，先判断oldpass是否正确，不正确则返回，重新输入，若匹配成功，再判断newpasswd和checknewpasswd是否一致，不一致返回，重新输入，一致的话，把该用户的密码改成新密码后入栈。最后处理完的数据写入文件中。

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<?php
    session_start();
    if($_SESSION['uname']==NULL) {
        echo "<script>alert('请登录'); location.href='../login.html'</script>";
        die("请登录");
    }
    if($_POST['oldpasswd']==NULL && $_POST['newpasswd']==NULL && $_POST['checknewpasswd']==NULL){
        echo "<script>alert(\"密码不能为空\"); history.back();</script>";
    }
    $tmparr = array();
    $userPasswd = array();
    $oldpass = $_POST['oldpasswd'];
    $newpass = $_POST['newpasswd'];
    $checknew = $_POST['checknewpasswd'];
    $fhandle = fopen('../data/user1.db', 'r');
    while(!feof($fhandle)) {
        $line = fgets($fhandle);
        $lineArr = explode('||', $line);
        if ($lineArr[0] == $_SESSION['uname']) {
            $userPasswd[0] = $lineArr[0];
            $userPasswd[1] = $newpass."\n";
            $checkold = $lineArr[1];
            array_push($tmparr, $userPasswd);
            continue;
        }
        array_push($tmparr, $lineArr);
    }
    fclose($fhandle);
    if(trim($checkold)!=$oldpass){
        echo "<script>alert(\"密码不正确！\")</script>";
    }else {
        if ($newpass == $checknew) {
            $fhandle = fopen('../data/user1.db', w);
            for ($i = 0; $i < count($tmparr); $i++) {
                $str = implode('||', $tmparr[$i]);
                echo $str;
                echo "<br>";
                fputs($fhandle, $str);
            }
            fclose($fhandle);
            echo "<script>alert(\"密码修改成功，请重新登录！\")</script>";
            //echo "<script>location.href='../logout.php'</script>";

        }else{
            echo "<script>alert(\"新密码不匹配，请重新输入！\")</script>";
        }
    }
?>

修改密码界面：

密码修改后登出账号，重新登录。

五、上传头像 upload.php

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<?php include '../basedir/function.php'; include '../basedir/header.php'; ?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>上传图片</title>
</head>
<body>
<?php
if($_SESSION['uname']==NULL)
    echo "<script>alert('请登录'); location.href='../login.html'</script>";
?>
<div align="center">
    <a href="del.php">删除新闻</a>       &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="../data/addNews.php">添加新闻</a>      &nbsp  &nbsp  &nbsp  &nbsp  &nbsp
    <a href="getpasswd.php">修改密码</a>
    <br><br><br>
    <form action="upload.php" method="post" enctype="multipart/form-data">
        <label>文件名：</label>
        <input type="file" name="file" ><br>
        <input type="text" name="title"><br>
        <input type="submit" name="submit" value="提交">
    </form>
</div>
</body>
</html>
<?php
if(isset($_POST['submit'])){
    $name       = $_FILES['file']['name'];
    $temp_name  = $_FILES['file']['tmp_name'];
    if(isset($name)){
        if(!empty($name)){
            $location = "../upload/";
            $path = $location . $name;
            if(move_uploaded_file($temp_name, $location.$name)){
                $_SESSION['headImg'] = $path;
                echo 'File uploaded successfully';
                echo <<<EOF
                <div align="center">
                    <img src=$path>   
                </div>
EOF;
            }
        }
    }  else {
        echo 'You should select a file to upload !!';
    }
}
?>
<?php include '../basedir/footer.php'?>

上传头像界面：

六、退出账号 logout.php

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<?php
session_start();
session_destroy();
echo "<script>alert('账号已退出'); location.href='login.html'</script>"
?>

在任何一个界面点击注销账号均能成功退出，重新返回用户登录界面

点击确定，返回用户登录界面。

七、问题与总结

  1. 目前的代码有些冗余，比如删除新闻和修改密码，都是把需要的信息读取出来，然后稍作处理再写回文件，可以在function.php文件里写一个函数，需要时直接调用函数就行；删除新闻界面和初始化界面都有展示新闻的功能，也可可以通过一个函数来实现展示。
  2. 对写入文件的内容判断不严谨，会把\n写入，文件内容间有空行时，统计总的id数会把空行也给统计进去，进而导致删除新闻时，不成功。把空行删完以后，才会执行成功。目前对文件操作\n理解不深，正在寻找方法解决。
  3. 代码移植性差，需要修改地方较多。