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PHP data access add, delete, modify and check operations_php skills
PHP data access add, delete, modify and check operations_php skills
a small exercise in adding, deleting, modifying and checking, let’s practice it
1. view the news page-----main page
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>查看新闻</title>
</head>
<body>
<h1 id="查看新闻">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>
2. publish news page-----add content
<html>
<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 id="center-发布新闻-center"><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>
processing after submitting content:
<?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！";
}
3. deletion of content
<?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";
}
?>
4. modify the news page----modify the news content and submit it for viewing
<html>
<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 id="center-修改新闻-center"><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>
process after submitting the modified content:
<?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!";
}
the above is the entire content of this article. i hope it will be helpful to everyone in learning php programming.
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