heb deze foutmelding:

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\login.php on line 14

en dit script:

<?php

$username = $_POST['username'];
$password = $_POST['password'];

if ($username&&$password)
{

$query = mysql_connect("localhost","root","") or die("Couldn't connect!");
mysql_select_db("phplogin") or die("Couldn't find db");

$query = mysql_query ("SELECT * FROM user WHERE username='$username'");

$numrows = mysql_num_rows($query);

if ($numrows!==0)
{
// code to login

}
else
die("That user doesn't exist!");

}
else
die("please enter any username or password");
?>