php增删改查示例自己写的demo_php实例

//第一步：链接数据库 
$conn=@mysql_connect("localhost:3306","root","root")or die ("mysql链接失败"); 
//第二步: 选择指定的数据库，设置字符集 
@mysql_select_db("php_blog",$conn) or die ("db链接失败".mysql_error()); 
mysql_query('SET NAMES UTF8')or die ("字符集设置错误"); 
?> 
 
2.增加 add.php 
 代码如下:

include("conn.php");//引入链接数据库 
if(!empty($_POST['sub'])){ 
$title=$_POST['title']; 
$con=$_POST['con']; 
echo $sql="insert into news(id,title,dates,contents) value (null,'$title',now(),'$con')" ; 
mysql_query($sql); 
echo"插入成功"; 
} 
?> 
 
 
3.删除del.php 
 代码如下:

include("conn.php");//引入链接数据库
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); 
$rs=mysql_fetch_array($query); 
} 
if(!empty($_POST['sub'])){ 
$title=$_POST['title']; 
$con=$_POST['con']; 
$hid=$_POST['hid']; 
$sql="update news set title='$title',contents='$con' where id='$hid' limit 1 "; 
mysql_query($sql); 
echo ""; 
echo"更新成功"; 
} 
?> 

 
if(!empty($_GET['del'])){ $d=$_GET['del']; $sql="delete from news where id ='$d'"; } $query=mysql_query($sql); echo "删除成功"; ?>
 
 

 
4，改 edit.php页面 
 

 
 
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); 
$rs=mysql_fetch_array($query); 
} 
if(!empty($_POST['sub'])){ 
$title=$_POST['title']; 
$con=$_POST['con']; 
$hid=$_POST['hid']; 
$sql="update news set title='$title',contents='$con' where id='$hid' limit 1 "; 
mysql_query($sql); 
echo ""; 
echo"更新成功"; 
} 
?> 

 
5.查，列表页面
添加内容 
 
 
 
include("conn.php");//引入链接数据库 
if(!empty($_GET['keys'])){ 
$w=" title like '%".$_GET['keys']."%'"; 
}else{ 
$w=1; 
} 
$sql="select * from news where $w order by id desc"; 
$query=mysql_query($sql); 
while($rs=mysql_fetch_array($query)){ 
?> 
标题:"> ">编辑｜｜">删除
 
 
 
 
} 
?>