Question

通过我的表单提交内容后，我得到了欢迎部分，然后是mysql连接错误，因为mysql已关闭，当我打开它然后布尔错误时它会消失。＆＃34;警告：mysqli_query（）要求参数1为mysqli，在第25行和第34行的C：\ xampp \ htdocs \ welcome.php中给出布尔值;

<html>
<body>
Welcome <?php echo $_POST["name"]; ?><br>
Your email address is: <?php echo $_POST["email"]; ?><br>
Your password is <?php echo $_POST["password"]; ?><br>
You have purchased the <?php echo $_POST["sub_type"]; ?>
<?php
$mysqli_host = "localhost";
$mysql_username = "root";
$mysql_password = "123";
$site_db = "test";
$info_name = $_POST["name"];
$info_pass = $_POST["password"];
$info_email = $_POST["password"];
$sub_type = $_POST["sub_type"];

$con=mysqli_connect($mysqli_host,$mysql_username,$mysql_password,$site_db);
// Checks connection to twitch webpanel database and inserts registreation info
if (mysqli_connect_errno());
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

mysqli_query($con,"INSERT INTO Users (Username, Password, Email, Subcription)
VALUES ('$info_name', '$info_pass', '$info_email', '$sub_type')");

?>

</body>
</html>

Answer 1

最有可能的是，mysqli_connect中存在连接错误。错误的凭据或MySQL已关闭。

if (mysqli_connect_errno())
{
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
    //you need to exit the script, if there is an error
    exit();
}

Answer 2

if (mysqli_connect_errno());
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit(); // **this is missing**
}
mysqli_query($con,"INSERT INTO Users (Username, Password, Email, Subcription)
VALUES ('$info_name', '$info_pass', '$info_email', '$sub_type')");

Answer 3

这是你的错误：

if (mysqli_connect_errno());

最后应该没有分号。

同样根据文档，您应该使用它来检查连接错误：

if (mysqli_connect_error())

但正如我在评论中所说，我建议使用PDO而不是mysqli。并确保正确转义插入数据库的值并使用pbkdf2或scrypt加密密码。

警告：mysqli_query（）要求参数1为mysqli boolean

3 个答案: