php+mysql实现简单的增删改查功能
程序员文章站
2023-02-19 13:08:58
列表代码
列表代码
<?php
$con = mysql_connect("localhost:3306","root","");
if (!$con) {
die('could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
$result = mysql_query("select * from user");
echo "<table border='1'>
<tr>
<th>username</th>
<th>password</th>
</tr>";
while($row = mysql_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['username'] . "</td>";
echo "<td>" . $row['password'] . "</td>";
echo "</tr>";
}
echo "</table>";
mysql_close($con);
?>
删除
<?php
$con = mysql_connect("localhost","root","");
if (!$con) {
die('could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
mysql_query("delete from user where username = '$_post[username]'");
mysql_close($con);
?>
添加
<?php
$con = mysql_connect("localhost:3306","root","");
if (!$con) {
die('could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
$sql = "insert into user (username,password)
values
('$_post[username]','$_post[password]')";
if (!mysql_query($sql,$con)) {
die('error: ' . mysql_error());
}
echo "1 record added";
mysql_close($con);
?>
修改
<?php
$con = mysql_connect("localhost","root","");
if (!$con) {
die('could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
mysql_query("update user set password = '$_post[password]' where username = '$_post[username]'");
mysql_close($con);
?>
<html>
<head>
<title>用php向数据库中实现简单的增删改查</title>
</head>
<body>
<br />
<h1>insert:</h1>
<form action="insert.php" method="post">
username:<input type="name" name="username"/>
<br />
password:<input type="password" name="password"/>
<input type="submit" value="submit"/>
</form>
<br /><hr /><br />
<h1>delete</h1>
<form action="delete.php" method="post">
username:<input type="name" name="username" />
<br />
are you sure?<input type="submit" value="sure" />
</form>
<br /><hr /><br />
<h1>update</h1>
<form action="update.php" method="post">
username:<input type="name" name="username"/>
<br />
you want to change your password into:<input type="password" name="password"/>
<input type="submit" value="submit"/>
</form>
<br /><hr /><br />
</body>
</html>
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