通过我的表单提交一些内容后，我得到欢迎部分，然后是 mysql 连接错误，因为 mysql 已关闭，当我打开它时它消失，然后是布尔错误。 “警告：mysqli_query() 期望参数 1 为 mysqli，布尔值在 C:\xampp\htdocs\welcome.php 第 25 行给出”
<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>
最有可能的是，您在 mysqli_connect 中出现连接错误。凭据错误或 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();
}
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