php+mysql实现简单的增删改查功能

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>

以上所述就是本文的全部内容了，希望大家能够喜欢.