PHP留言小练习

<link rel="stylesheet" href="css/main.css">
<div class="g-wrap">
    <div class="m-top">
        <a class="mt-link" href="add.php">留言</a>
        <div class="mt-search">
            <form action="" name="keys">
                <input type="text" name="keys">
                <input type="submit" value="搜索">
            </form>
        </div>
    </div>
    <div class="m-con">
        <ul class="m-infor">
            <?php
                include("conn.php");//引入数据库
                if(!empty($_GET[‘keys‘])){
                    $w = " `title` like ‘%".$_GET[‘keys‘]."%‘ ";
                }
                else{
                    $w = 1;
                }
                $sql = "select * from `news` where $w order by id desc limit 10";//倒序显示10条,where 1表示没有任何条件和不写一样
                $query = mysql_query($sql);//执行sql语句并返回资源
                //$rs = mysql_fetch_array($query);//返回双重数组，下标和键名都有，每执行一次得到一条
                while( ($rs = mysql_fetch_array($query)) != false ){
            ?>
            <li class="mi-list">
                <h3 class="ml-top">
                    <a href="view.php?id=<?php echo $rs[‘id‘]; ?>">
                        <?php echo $rs[‘title‘]; ?>
                    </a>
                </h3>
                <div class="ml-cen">
                    <?php echo iconv_substr($rs[‘contents‘],0,10,"gbk"); ?>...
                </div>
                <div class="ml-bot">
                    <span class="mb-l"><?php echo $rs[‘dates‘]; ?></span>
                    <div class="mb-r">
                        <a href="edit.php?id=<?php echo $rs[‘id‘]; ?>">编辑</a>
                        <a href="del.php?del=<?php echo $rs[‘id‘]; ?>">删除</a>
                    </div>
                </div>
            </li>
            <?php
                }
            ?>
        </ul>
    </div>
</div>

<link rel="stylesheet" href="css/main.css">
<?php 
    include("conn.php");//引入链接数据库
    if( !empty($_POST["sub"]) ){//第一次返回真empty($_POST["sub"])这里也可以用其他值判断
        $title = $_POST[‘title‘];
        $con = $_POST[‘con‘];
    
        $sql = "insert into `news` (`id`,`title`,`dates`,`contents`,`hits`) values (null,‘$title‘,now(),‘$con‘,0)";
    
        mysql_query($sql);//执行sql语句
    
        $url = "./index.php";
        
        echo "<script>location.href=‘".$url."‘;</script>";
        //print_r($sql);
    }
?>
<div class="g-wrap">
    <div class="m-form">
        <form action="add.php" method="post">
            <ul>
                <li>
                    <label for="">标题：</label>
                    <input type="text" name="title">
                </li>
                <li>
                    <label for="">内容：</label>
                    <textarea id="" cols="30" rows="10" name="con"></textarea>
                </li>
                <li>
                    <input type="submit" name="sub" value="发表">
                </li>
            </ul>
        </form>
    </div>
</div>

<link rel="stylesheet" href="css/main.css">
<?php
    include("conn.php");
    if( !empty($_GET[‘id‘]) ){
        $sql = "select * from news where `id`=‘".$_GET[‘id‘]."‘";
        $query = mysql_query($sql);//执行sql语句
        
        $rs = mysql_fetch_array($query);
        //print_r($rs);
    }
    //执行update语句
    if(!empty($_POST["sub"])){//第一次返回真empty($_POST["sub"])这里也可以用其他值判断 这里只有点提交的时候才执行嘛
    
        $title = $_POST[‘title‘];
        $con = $_POST[‘con‘];
        $hid = $_POST[‘hid‘];//这里也可以通过get获取值与之对应起来
        $sql = "update `news` set `title`=‘$title‘,`contents`=‘$con‘ where id=‘$hid‘ limit 1 ";
    
        mysql_query($sql);//执行sql语句
    
        //echo "更新成功";
        echo "<script>alert(‘更新成功！‘);location.href=‘index.php‘;</script>";
    }
?>
<div class="g-wrap">
    <div class="m-form">
        <form action="edit.php" method="post">
            <input type="hidden" name="hid" value="<?php echo $rs[‘id‘]; ?>">
            <ul>
                <li>
                    <label for="">标题：</label>
                    <input type="text" name="title" value="<?php echo $rs[‘title‘]; ?>">
                </li>
                <li>
                    <label for="">内容：</label>
                    <textarea id="" cols="30" rows="10" name="con"><?php echo $rs[‘contents‘]; ?></textarea>
                </li>
                <li>
                    <input type="submit" name="sub" value="发表">
                </li>
            </ul>
        </form>
    </div>
</div>

<?php
    include("conn.php");
    
    if(!empty($_GET[‘del‘])){//empty()当为空时返回真
        $d = $_GET[‘del‘];
        $sql = "delete from `news` where `id`=‘$d‘";
        
        mysql_query($sql);//执行sql语句
        $url = "./index.php";
        echo "<script>alert(‘删除成功！‘);location.href=‘".$url."‘;</script>";
    }
?>

<link rel="stylesheet" href="css/main.css">
<?php
    include("conn.php");//引入链接数据库
    if(!empty($_GET[‘id‘])){
        $sql = "select * from news where `id`=‘".$_GET[‘id‘]."‘";
        $query = mysql_query($sql);//执行sql语句
        
        $rs = mysql_fetch_array($query);
        
        //print_r($rs);
        
        $sqlup = "update news set hits=hits+1 where `id`=‘".$_GET[‘id‘]."‘";
        mysql_query($sqlup);
        
    }
?>
<div class="g-wrap m-infor-details">
    <h1 class="mid-title"><?php echo $rs[‘title‘]; ?></h1>
    <p class="mid-con">
        <?php echo $rs[‘contents‘]; ?>
    </p>
    <div class="mid-bot">
        <span class="mid-b-l">时间：
            <?php echo $rs[‘dates‘]; ?>   
        </span>
        <span class="mid-b-r">点击量：
            <?php echo $rs[‘hits‘]; ?>
        </span>
    </div>
</div>

<?php
    //@不把错误暴露出来
    @mysql_connect("localhost:3306","root","123456") or die("mysql链接失败");
    @mysql_select_db("test") or die("db链接失败");
    
    //mysql_set_charset("gbk");//php5.2.3以上
    mysql_query("set names ‘gbk‘");
?>

*{
    margin: 0;
    padding: 0;
}
li{
    list-style-type: none;
}
body{
    background-color: #1B9102;
    font-size: 14px;
}
/*....................................index.html...........*/
.g-wrap{
    margin: 50px auto 0;
    width: 500px;
    min-height: 300px;
    box-shadow: 0 0 10px #fff;
}
.m-top{
    background-color: #d2d2d2;
    overflow: hidden;
}
.mt-link{
    float: left;
}
.mt-search{
    float: right;
    font-size: 0;
}
[type=submit]{
    cursor: pointer;
}
.mi-list{
    color: #adadad;
    padding-top: 20px;
    border-bottom: 1px dashed #fff;
}
.ml-top{
    color: #333;
}
.ml-cen{
    margin-top: 10px;
    font-size: 12px;
}
.ml-bot{
    height: 50px;
    line-height: 50px;
    margin-top: 10px;
}
.mb-l{
    float: left;
    color: pink;
}
.mb-r{
    float: right;
    cursor: pointer;
}
/*......................................add.html...........*/
.m-form{
    padding: 20px;
    box-sizing: border-box;
}
.m-form li{
    margin-bottom: 20px;
}
.m-form label{
    color: #fff;
    vertical-align: top;
}
/*......................................view.html...........*/
.m-infor-details{
    padding: 20px 20px 50px;
    box-sizing: border-box;
    position: relative
}
.mid-title{
    color: #fff;
    text-align: center;
}
.mid-con{
    color: #a9a9a9;
    font-size: 14px;
    margin-top: 20px;
    text-indent: 30px;
}
.mid-bot{
    position: absolute;
    right: 20px;
    bottom: 0;
    left: 20px;
    height: 50px;
    line-height: 50px;
    color: #fff;
}
.mid-b-l{
    float: left;
}
.mid-b-r{
    float: right;
}