警告：mysql_fetch_array（）期望参数1是资源，布尔值 [英] Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean

问题描述

// Grab User submitted information
$user = $_POST["username"];
$pass = $_POST["password"];

include("db.php");
session_start();
$_SESSION['username']=$_POST['username'];
$username=$_SESSION['username'];
// Select the database to use
mysql_select_db("ivivc",$link);

$result = mysql_query("SELECT username, password FROM $username WHERE username = $user");

$row = mysql_fetch_array($result);

if($row["username"]==$user && $row["password"]==$pass)
    echo"You are a validated user.";
else
    echo"Sorry, your credentials are not valid, Please try again.";
?>

推荐答案

用户 =

user =

_POST [ username];

_POST["username"];

pass =

pass =

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