php增删改查,自己写的demo
1.链接数据库通用方法:conn.php
<?php //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"); ?>
<?php 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"; } ?>
<?php include("conn.php");//引入链接数据库<div class="code" style="position:relative; padding:0px; margin:0px;"><pre name="code" class="html"><?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); $rs=mysql_fetch_array($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($sql); echo "<script> alert('更新成功'); location.href='index.php'"; echo"更新成功"; } ?>
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<?php include("conn.php");//引入链接数据库 if(!empty ($_GET['id'])){ $sql="select * from news where id='".$_GET['id']."'"; $query=mysql_query($sql); $rs=mysql_fetch_array($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 "<script> alert('更新成功'); location.href='index.php'"; echo"更新成功"; } ?>
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