Question

如果“查询结果为= 1”，我应该更换“代码验证？” 我尝试了很多使用num_rows的方法，但它不起作用。

我的PHP代码：

    $con=mysqli_connect("localhost","mbrconsu_un394x","y1cz9,rd+hf6","mbrconsu_mmx");

    if (mysqli_connect_errno($con))
    {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }

    $usuario = $con->real_escape_string($_GET['usuario']);
    $senha = $con->real_escape_string($_GET['senha']);

        $query = mysqli_query($con, "SELECT * FROM 'login' WHERE usuario = '$usuario' AND senha='$senha'");

        if(CODE TO VERIFY IF QUERY RESULT ROW IS = 1){
            while($row = mysqli_fetch_assoc($query)){
                $db_username = $row['usuario'];
                $db_password = $row['senha'];
            }
            if($usuario == $db_username && $senha == $db_password){
                return true;
            }
            } else {
            return false;
        }

    mysqli_close($con);
?>

Answer 1

$query->num_rows;

或

mysqli_num_rows($query);

Answer 2

您也可以使用此SQL查询：

Select count(*) from table

Answer 3

你可以做到

with

您也可能希望将用户名和密码保存在一个文件中作为常量

Answer 4

您可以使用：

$stmt=$mysqli->prepare("select `id` from `agahicustomer` where `city`=?");
    $stmt->bind_param("s",$cityid);
    $stmt->execute();
    $stmt->store_result();
    $stmt->bind_result($id);
    return $stmt->affected_rows;
    $stmt->close();

PHP，MySQLi - 如何计算查询结果行？

4 个答案: