首页 / 网页编程 / PHP / php增删改查示例自己写的demo
1.链接数据库通用方法:conn.php 复制代码 代码如下: <?php //第一步:链接数据库 $conn=@mysql_connect("localhost:3306","root","root")or die ("mysql链接失败"); //第二步: 选择指定的数据库,设置字符集 @mysql_select_db("php_blog",$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 复制代码 代码如下: <?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"; } ?> <form action="add.php" method="post"> 标题: <input type="text" name="title"><br> 内容: <textarea rows="5" cols="50" name="con"></textarea><br> <input type="submit" name="sub" value="发表"> </form> 3.删除del.php 复制代码 代码如下: <?php include("conn.php");//引入链接数据库<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"</script>"; echo"更新成功"; } ?> <form action="edit.php" method="post"> <input type="hidden" name="hid" value="<?php echo $rs["id"]?>"/> 标题: <input type="text" name="title" value="<?php echo $rs["title"]?>"><br> 内容: <textarea rows="5" cols="50" name="con"><?php echo $rs["contents"]?></textarea><br> <input type="submit" name="sub" value="发表"> </form></pre><br> if(!empty($_GET["del"])){ $d=$_GET["del"]; $sql="delete from news where id ="$d""; } $query=mysql_query($sql); echo "删除成功"; ?><p></p> <pre></pre> <br> 4,改 edit.php页面 <p></p> <p><br> </p> <p></p><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"</script>"; echo"更新成功"; } ?> <form action="edit.php" method="post"> <input type="hidden" name="hid" value="<?php echo $rs["id"]?>"/> 标题: <input type="text" name="title" value="<?php echo $rs["title"]?>"><br> 内容: <textarea rows="5" cols="50" name="con"><?php echo $rs["contents"]?></textarea><br> <input type="submit" name="sub" value="发表"> </form></pre><br> 5.查,列表页面<pre name="code" class="html"><a href="add.php">添加内容</a> <hr> <hr> <form> <input type="text" name="keys" /> <input type="submit" name="subs" value="搜索"/> </form> <?php include("conn.php");//引入链接数据库 if(!empty($_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)){ ?> <h2>标题:<a href="view.php?id=<?php echo $rs["id"] ?>"><?php echo $rs["title"] ?></a> <a href="edit.php?id=<?php echo $rs["id"] ?>">编辑</a>||<a href="del.php?del=<?php echo $rs["id"] ?>">删除</a></h2> <li><?php echo $rs["dates"] ?></li> <p><?php echo $rs["contents"] ?></p> <hr> <?php } ?> </pre><br> <p></p> <p><br> </p>
收藏该网址