$link = mysqli_connect('localhost', 'root', '', 'wow') or die('pizdes');
if (!empty($_POST['name']) && !empty($_POST['pass'])) {
$login = htmlspecialchars($_POST['name']);
$password = md5($_POST['pass']);
$sel = "SELECT * FROM user_counter
WHERE count
= '".$login.'"';
$query = mysqli_query($link, $sel);
$numrows = mysqli_num_rows($query);
var_dump($query);
if ($numrows == 0) {
$sql = "INSERT INTO user_counter
(count
, password
) VALUES ('$login', '$password')";
$result = mysqli_query($link, $sql);
var_dump($numrows);
if ($result) {
echo "ok";
}else{
echo "problem";
}
там одинарные кавычки, вроде