如何检查结果是否从MySQL查询返回

Question

我的代码在XAMPP服务器上运行，该服务器连接到db.php的数据库。

<?php
require 'db.php';
session_start();

$first_name = $_SESSION['first_name'];
$last_name = $_SESSION['last_name'];
$email = $_SESSION['email'];
$active = $_SESSION['active'];
if(isset($_GET['email']) && !empty($_GET['email']) AND isset($_GET['hash']) && !empty($_GET['hash']))
{
    $email = $mysqli->escape_string($_GET['email']); 
    $hash = $mysqli->escape_string($_GET['hash']); 

    $mysqli->query("SELECT * FROM users WHERE email='$email' AND hash='$hash' AND active='1'");
    if (@@ROWCOUNT <> 1) {
        $_SESSION['message'] = "Account has already been activated";

        echo '<script type="text/javascript">
           window.location = "/html/rtl/profile.php"
      </script>';
    }
}

我正在尝试在PHP中使用if语句来查看我的MySQL搜索是否返回结果，但是它不起作用。 我该怎么做？

Answer 1

尝试这个：

$query = $mysqli->query("SELECT * FROM users WHERE email='$email' AND hash='$hash' AND active='1'");
if($query->num_rows<>1) {
   //Rest of the code
}