mysql php链接mysql并保存email和username的范例代码

<?php
 //opens connnection to mysql server

$dbc = mysql_connect('localhost','root','');
if (!dbc){
    die('Not Connected:' . mysql_error());
    }
//select a database

$db_selected = mysql_select_db("rivals",$dbc);
if(!$db_selected)
{
    die("can't connect :" . mysql_error());
}

$query = "UPDATE `database` SET email='something' WHERE username='rivals'";
$result = mysql_query($query, $dbc) or die(mysql_error());

$username = $_GET['username'];
$email = $_GET['email'];
$password = $_GET['password'];
$insert = "INSERT INTO `database` (`username`, `email`, `password`) VALUES ('$username', '$email', '$password')";

if(isset($username) && isset($email) && isset($password)){
$addnew = mysql_query($insert, $dbc) or die(mysql_error());
}

if($addnew){
echo "Username [".$username."] with Email Address [".$email."] and password[".$password."]<br><br>";
}

// just a message
echo "it's done"
?>