資料庫連線

<?php
header("Content-Type: text/html;charset=utf-8");
$conn=mysqli_connect("localhost:3306","root","root","mydb") or die("連線失敗");
?>

form表單

<?php
    include("conn.php");
if (mysqli_connect_errno($conn))
    {
echo "連線 MySQL 失敗: " . mysqli_connect_error();
}
if(!empty($_POST['sub'
 
])){
$username=$_POST['username'];
$password=$_POST['password'];
echo  $sql="insert into weblog(username,password) values('$username','$password')";
mysqli_query($conn,"$sql");
echo "註冊成功";
}
?><form action="add.php" method="POST" >
賬號：<input type="text" name="username"><br>
密碼：<input 
 
type="password" name="password"><br>
    <input type="submit" name="sub" value="註冊">
</form>