PHP link MySQL database most simple login

<?php
Header ("Content-type:text/html;charset=utf-8");
$account = $_post[' account '];
$password = $_post[' password ');
Echo '
<form action= "login.php" method= "POST" >
Accounts: <input type= "text" name= "account" ><br><br>
Password: <input type= "password" name= "password" ><br><br>
<input type= "Submit" value= "Login" >
</form>
‘;
function login ($account, $password) {
$conn = mysql_connect ("localhost", "root", "root");
$result = mysql_db_query ("Database", "SELECT * from < table name > WHERE account = ' $account ' and PASSWORD = ' $password '", $con n);
$row = Mysql_fetch_row ($result);
if ($row! = null) {
Judge set up jump next page
Echo ' <script language= "javascript" >location.href= "test1/index.php" </script> ";
}else{
Echo ' Login failed ';
}
Mysql_free_result ($result);
Mysql_close ($conn);
}
Login ($account, $password);
?>

PHP link MySQL database most simple login