php增删改查示例自己写的demo-php手册-PHP中文网

php增删改查示例自己写的demo

php中文网

发布： 2016-06-06 20:27:46

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增删改查是对数据库最基本的操作，下面详细为大家介绍下如何连接数据库以及增删改查等等相关知识，感兴趣的朋友可以参考下

1.链接数据库通用方法：conn.php

复制代码代码如下:

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//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:

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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

复制代码代码如下:

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include("conn.php");//引入链接数据库

<?php <BR>include("conn.php");//引入链接数据库 <BR>if(!empty ($_GET['id'])){ <BR>$sql="select * from news whereid']."'"; <BR>$query=mysql_query($sql); <BR>$rs=mysql_fetch_array($query); <BR>} <BR>if(!empty($_POST['sub'])){ <BR>$title=$_POST['title']; <BR>$con=$_POST['con']; <BR>$hid=$_POST['hid']; <BR>$sql="update news set title='$title',contents='$con' where limit 1 "; <BR>mysql_query($sql); <BR>echo "<script> alert('更新成功'); location.href='index.php'</script>"; <BR>echo"更新成功"; <BR>} <BR>?> <BR><form action="edit.php" method="post"> <BR><input type="hidden" value="<?php echo $rs['id']?>"/> <BR>标题: <input type="text" value="<?php echo $rs['title']?>"><br> <BR>内容: <textarea rows="5" cols="50"><?php echo $rs['contents']?></textarea><br> <BR><input type="submit" value="发表"> <BR></form>

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

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4，改 edit.php页面

<?php <BR>include("conn.php");//引入链接数据库 <BR>if(!empty ($_GET['id'])){ <BR>$sql="select * from news whereid']."'"; <BR>$query=mysql_query($sql); <BR>$rs=mysql_fetch_array($query); <BR>} <BR>if(!empty($_POST['sub'])){ <BR>$title=$_POST['title']; <BR>$con=$_POST['con']; <BR>$hid=$_POST['hid']; <BR>$sql="update news set title='$title',contents='$con' where limit 1 "; <BR>mysql_query($sql); <BR>echo "<script> alert('更新成功'); location.href='index.php'</script>"; <BR>echo"更新成功"; <BR>} <BR>?> <BR><form action="edit.php" method="post"> <BR><input type="hidden" value="<?php echo $rs['id']?>"/> <BR>标题: <input type="text" value="<?php echo $rs['title']?>"><br> <BR>内容: <textarea rows="5" cols="50"><?php echo $rs['contents']?></textarea><br> <BR><input type="submit" value="发表"> <BR></form>

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5.查，，列表页面

<a href="add.php">添加内容</a> <BR><hr> <BR><hr> <BR><form> <BR><input type="text" /> <BR><input type="submit" value="搜索"/> <BR></form> <BR><?php <BR>include("conn.php");//引入链接数据库 <BR>if(!empty($_GET['keys'])){ <BR>$w=" title like '%".$_GET['keys']."%'"; <BR>}else{ <BR>$w=1; <BR>} <BR>$sql="select * from news where $w order by id desc"; <BR>$query=mysql_query($sql); <BR>while($rs=mysql_fetch_array($query)){ <BR>?> <BR><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> <BR><li><?php echo $rs['dates'] ?></li> <BR><p><?php echo $rs['contents'] ?></p> <BR><hr> <BR><?php <BR>} <BR>?> <BR>

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