php - PHP bind_param 转换混淆

Question

我正在制作一个登录表单，我对如何使用绑定参数来选择数据感到很困惑。

我当前的代码如下所示：

$stmt = $mysqli_conn->query('SELECT * FROM user WHERE email = ? AND password = ?');
    $stmt->bind_param('ss', $emailclean, $passwordclean);

    $stmt->execute();

    $result = $stmt->get_result();
    if ($row = $result->fetch_assoc()) {
        $finalmessager['success'] = 'You are logged in';
        $_SESSION['finalmessagelog']= $finalmessager;
        $_SESSION['authenticateduser']= $emailclean;
        header('location:../index.php');
        unset($_SESSION['logErrors']);
    }

我不明白为什么这不起作用

Answer 1

我举个小例子：

<?php
$query = "SELECT * FROM user WHERE email = ? AND password = ?";
$stmt = $this->db->prepare($query);
$stmt ->bind_param("ss", $emailclean, $passwordclean); //both are strings
$stmt->execute();
$stmt->store_result();
$stmt->bind_result($column1, $column2); //you have to assign every column

    while($stmt->fetch())
{
    if($column1 == 1){ //first column is id? just guessing
      echo "its the id 1 yeah!";
    }
    echo "col1: $column1, col2: $column2 \n";
}

$stmt->close();