php 之 数据访问 增删改查练习题
练习题内容：
一、查看新闻页面-----主页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>查看新闻</title>
</head>
<body>
<h1>查看新闻</h1>
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>id</td>
<td>title</td>
<td>author</td>
<td>source</td>
<td>content</td>
<td>date</td>
<td>update</td>
<td>delete</td>
</tr>
<?php
$db=new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("连接失败！");
$sql="select * from news";
$result=$db->query($sql);
$arr=$result->fetch_all();
foreach ($arr as $v)
{
echo "<tr>
<td>{$v[0]}</td>
<td>{$v[1]}</td>
<td>{$v[2]}</td>
<td>{$v[3]}</td>
<td>{$v[4]}</td>
<td>{$v[5]}</td>
<td><a href='Update.php?newsid={$v[0]}'>update</a></td>
<td><a href='Delete.php?newsid={$v[0]}'>delete</a></td>
</tr>";
}
?>
</table>
<br>
<br />
<div class="xw"><a href="xinwen.php">发布新闻</a></div>
</body>
</html>
二、发布新闻页面-----添加内容：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>发布新闻</title>
<style>
.xw
{
margin-top:10px;
margin-left:400px;
border:thick;
}
.a
{
float:left;
}
</style>
</head>
<body>
<h1><center>发布新闻</center></h1>
<form action="AddChu.php" method="post">
<div class="xw">标题：<input type="text" name="title" style="width:400px"></div>
<div class="xw">作者：<input type="text" name="author"></div>
<div class="xw">来源：<input type="text" name="source"></div>
<div class="xw">内容:
<textarea rows="10" cols="80" name="content"></textarea></div>
<div class="a"><input type="submit" value="提交" style="margin-left:600px;"></div>
<div class="a"><a href="ChaKan.php"><input type="button" value="查看" style="margin-left:6px;"></a></div>
</form>
</body>
</html>
提交内容后的处理：
<?php
$newsid=$_POST["newsid"];
$title=$_POST["title"];
$author=$_POST["author"];
$source=$_POST["source"];
$content=$_POST["content"];
$time=date("Y-m-d",time());
$db=new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("联系失败!");
$sql="insert into news values('{$newsid}','{$title}','{$author}','{$source}','{$content}','{$time}')";
$result=$db->query($sql);
if($result)
{
header ("location:xinwen.php");
}
else
{
echo "添加新闻失败！";
}
三、删除内容处理：
<?php
$newsid=$_GET["newsid"];
$db=new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("连接失败!");
$sql="delete from news where newsid='{$newsid}'";
$result=$db->query($sql);
if($result)
{
header ("location:ChaKan.php");
}
else
{
echo "删除数据失败";
}
?>
四、修改新闻页面----修改新闻内容后提交查看：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>修改新闻</title>
<style>
.xw
{
margin-top:10px;
margin-left:400px;
border:thick;
}
.a
{
float:left;
}
</style>
</head>
<body>
<h1><center>修改新闻</center></h1>
<?php
$newsid = $_GET["newsid"];
$db = new MySQLi("localhost","root","","mydb");
$sinfo = "select * from news where newsid='{$newsid}'";
$r = $db->query($sinfo);
$arr = $r->fetch_row(); //这个人的所有信息
?>
<form action="UpdateChu.php" method="post">
<div class="xw"><input type="hidden" name="newsid" value="<?php echo $arr[0] ?>"></div>
<div class="xw">标题：<input type="text" name="title" style="width:400px" value="<?php echo $arr[1] ?>"></div>
<div class="xw">作者：<input type="text" name="author" value="<?php echo $arr[2] ?>"></div>
<div class="xw">来源：<input type="text" name="source" value="<?php echo $arr[3] ?>"></div>
<div class="xw">内容:
<textarea rows="10" cols="80" name="content"><?php echo $arr[4] ?></textarea></div>
<div class="a"><input type="submit" value="修改" style="margin-left:600px;"></div>
<div class="a"><a href="ChaKan.php"><input type="button" value="查看" style="margin-left:6px;"></a></div>
</form>
</body>
</html>
提交修改内容后进行处理：
<?php $newsid=$_POST["newsid"]; $title=$_POST["title"]; $author=$_POST["author"]; $source=$_POST["source"]; $content=$_POST["content"]; $time=date("Y-m-d",time()); $db=new MySQLi("localhost","root","","mydb"); !mysqli_connect_error() or die("联系失败!"); $sql="update news set title='{$title}',author='{$author}',source='{$source}',content='{$content}',time='{$time}' where newsid='{$newsid}'"; $result=$db->query($sql); if($result) { header ("location:Update.php"); } else { echo "修改数据失败!"; }
