php - 已建立 MySQL 连接但查询失败

Question

我正在尝试创建一个登录页面。 连接成功但查询未获取所需结果。 登录页面通过post方法向action_page.php发送数据。

Action_page.php

<?php
$servername = "localhost:3306";
$username = "root";
$password = "";
$dbname = "MyDB";

$con = mysqli_connect($servername, $username, $password, $dbname);

// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$uname = $_POST['uname'];
$pass = $_POST['psw'];
$sql = "SELECT * FROM Users WHERE uname=".$uname." AND pass=".$pass;
echo "<br/>$sql<br/>";

//$result = $con->query($sql);

echo var_dump($con->query($sql));

$con->close();

?>

有人可以帮忙吗!

Answer 1

You can use single quote for the inserted variable inside double quote :)

$sql = "SELECT * FROM Users WHERE uname='$uname' AND pass='$pass'";