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php增删改查示例自己写的demo_PHP教程

时间:2021-07-01 10:21:17 帮助过:30人阅读

1.链接数据库通用方法:conn.php
代码如下:

//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






  • }
    ?>






    www.bkjia.comtruehttp://www.bkjia.com/PHPjc/313655.htmlTechArticle1.链接数据库通用方法:conn.php 代码如下:

    ?php //第一步:链接数据库 $conn=@mysql_connect("localhost:3306","root","root")or die ("mysql链接失败...

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