Prueba a ver esto:
Código PHP:
Ver original<?php
if(empty($_POST["username"]) || empty($_POST["password"])){ echo "Campos requeridos"
} else {
$username = $_POST["username"];
$password = $_POST["password"];
$sql="SELECT * FROM users WHERE username='$username' AND password='$password'"; $result = mysql_query($sql);
if ($count == 1) {
$_SESSION["username"] = $username;
$_SESSION["loggedIn"] = true;
header("Location:pagina.php"); } else {
echo "un mojón";
}
}
?>
Ya me dirás a ver que tal.