警告：mysql_fetch_array

Question

我收到以下错误：

警告：mysql_fetch_array() 期望参数 1 是资源，布尔值......

这是我的查询：

$result = mysql_query("SELECT * FROM users WHERE username = $user' AND password = '$pass'");
        while($row = mysql_fetch_array($result))
            {
                $expire = time()+60*60*24*30;
                setcookie("id", $row['id'], $expire);
                echo "Logged in. as <b>.".$row['username']."</b>";
            }

Answer 1

您似乎在 $user 的左侧缺少一个 ' （我已在此处添加）：

$result = mysql_query("SELECT * FROM users WHERE username = '$user' AND password = '$pass'");