PHP MySQLi 增删改查

1：登陆页面

 //前端显示部分

 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 "http://www.w3.org/1999/xhtml">

 "Content-Type" content="text/html; charset=utf-8" />
 无标题文档



 管理员登陆
 "dlyz.php" method="post">
 用户名："text" name="user" value="请输入您的工号" />

 密  码："password" name="psd" />

 "submit" value="登录" />
 "submit" value="注册新用户" formaction="zhuc.php"/>

//php对提交登陆信息的处理

 $user = $_POST["user"];
 $psd = $_POST["psd"];


 //造对象
 $db = new MySQLi("localhost","root","","newssystem");

 //判断是否出错
 !mysqli_connect_error() or die("连接失败！！");

 //写sql语句

 $sql = "select psd from yonghu where user='{$user}'";


 //执行SQL语句

 $result = $db-> query($sql);
 $v = $result->fetch_row();
 if($psd==$v[0])
 {
 header("location:fabuxinwen.php");
 }
 else
 {
 echo"您输入的用户名或密码不正确，请重新输入！！";
 }

2：注册页面

 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 "http://www.w3.org/1999/xhtml">

 "Content-Type" content="text/html; charset=utf-8" />
 无标题文档



 欢迎注册


 "zhucyz.php"method="post">
 用户名："text" name="user" value="请输入您的工号"/>

 密  码："password" name="psd" />

 "submit" value="提交" />








 $user = $_POST["user"];
 $psd = $_POST["psd"];


 //造对象
 $db = new MySQLi("localhost","root","","newssystem");

 //判断是否出错
 !mysqli_connect_error() or die("连接失败！！");

 //写sql语句

 $sql = "insert into yonghu values('{$user}','{$psd}')";

 //执行SQL语句

 $result = $db-> query($sql);

 if($result)
 {
 header("location:dl.php");
 }
 else
 {
 echo"很抱歉，注册失败！！";
 }

3：登陆进去以后，是发布页面，可以发布和查看

 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 "http://www.w3.org/1999/xhtml">

 "Content-Type" content="text/html; charset=utf-8" />
 无标题文档



 "width:100%; text-align:center" >
 发布新闻
 "post">
 "hidden" name="newsid"/>
 "margin:0 auto; text-align:left" >

 标题："text" style="width:400px" name="title" />


 作者：
 "text" style="width:400px" name="Author" />


 来源："text" style="width:400px" name="source"/>


 内容：
 "auto" rows="auto" style="width:400px; height:400px" name="content">




 $time = date('y-m-d h:i:s');

 echo "";
 ?>

 "submit" value="提交" formaction="tijiao.php"/>

 "submit" value="查看" formaction="chakan.php"/>

  

  

  

  

   

 $title = $_POST["title"];
 $Author = $_POST["Author"];
 $source = $_POST["source"];
 $content = $_POST["content"];

 //造对象
 $db = new MySQLi("localhost","root","","newssystem");

 //判断是否出错
 !mysqli_connect_error() or die("添加失败！！");

 //写sql语句

 $sql = "insert into news(title,Author,source,content) values('{$title}','{$Author}','{$source}','{$content}')";


 //执行SQL语句

 $result = $db-> query($sql);

 if($result)
 {
 header("location:fabuxinwen.php");
 }
 else
 {
 echo"很抱歉，添加失败！！";
 }

4：查看页面

 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 "http://www.w3.org/1999/xhtml">

 "Content-Type" content="text/html; charset=utf-8" />
 无标题文档



 "70%" border="1px" cellpadding="0" cellspacing="0" style="text-align:center">

 编号
 标题
 作者
 来源
 日期
 删除
 修改




 $db=new mysqli("localhost","root","","newssystem");
 !mysqli_connect_error() or die("连接错误");
 $sql="select * from news";
 $result=$db->query($sql);
 while($attr=$result->fetch_row())
 {
 echo "

 {$attr[0]}
 {$attr[1]}
 {$attr[2]}
 {$attr[3]}
 {$attr[5]}
 " return confirm('确定删除')\" href='scchuli.php?newsid={$attr[0]}'>删除
 'xiugai.php?newsid={$attr[0]}'>修改

 ";
 }

 ?>

5：在查看页面可以进行修改和删除

 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 "http://www.w3.org/1999/xhtml">

 "Content-Type" content="text/html; charset=utf-8" />
 无标题文档




 $id = $_GET["newsid"];

 $db=new mysqli("localhost","root","","newssystem");
 !mysqli_connect_error() or die("连接错误");
 $sql="select * from news where newsid='{$id}'";
 $result=$db->query($sql);
 $attr=$result->fetch_row();
 ?>
 "width:100%; text-align:center" >
 修改新闻
 "xgchuli.php" method="post">
 "hidden" name="newsid" echo "value='{$attr[0]}'";?>/>
 "margin:0 auto; text-align:left" >

 标题："text" style="width:400px" name="title" echo "value='{$attr[1]}'";?>/>


 作者：
 "text" style="width:400px" name="Author" echo "value='{$attr[2]}'";?>/>



 来源："text" style="width:400px" name="source" echo "value='{$attr[3]}'";?>/>



 内容：
 "auto" rows="auto" style="width:400px; height:400px" name="content">echo "{$attr[4]}";?>





 $time = date('y-m-d h:i:s');

 echo "";
 ?>

 "chakan.php">"button" title="查看" value="查看" />"submit" title="修改" value="修改"/>

  

  

  

  

  

  

  

   

  

  

$id=$_POST["newsid"];  

$title=$_POST["title"];  

$Author=$_POST["Author"];  

$source=$_POST["source"];  

$content=$_POST["content"];  

$time=$_POST["time"];  

  

$db = new MySQLi("localhost","root","","newssystem");  

  

!mysqli_connect_error() or die("连接失败");  

  

$sql="update news set title='{$title}',Author='{$Author}',source='{$source}',content='{$content}',time='{$time}' where newsid='{$id}' ";  

  

$result=$db->query($sql);  

if ($result)  

{  

header("location:chakan.php");  

}  

else  

{  

echo "修改失败";  

}  

//删除数据

 $id=$_GET["newsid"];

 $db=new mysqli("localhost","root","","newssystem");

 !mysqli_connect_error() or die("连接失败");

 $sql="delete from news where newsid='{$id}'";

 $result=$db->query($sql);

 if ($result)
 {
 header("location:chakan.php");
 }
 else
 {
 echo "删除失败";
 }

6：修改页面

 $title = $_POST["title"];
 $Author = $_POST["Author"];
 $source = $_POST["source"];
 $content = $_POST["content"];

 //造对象
 $db = new MySQLi("localhost","root","","newssystem");

 //判断是否出错
 !mysqli_connect_error() or die("添加失败！！");

 //写sql语句

 $sql = "insert into news(title,Author,source,content) values('{$title}','{$Author}','{$source}','{$content}')";


 //执行SQL语句

 $result = $db-> query($sql);

 if($result)
 {
 header("location:fabuxinwen.php");
 }
 else
 {
 echo"很抱歉，添加失败！！";
 }