Php不执行mysqli的query方法,php – mysqli :: query()：无法获取mysqli

Warning: mysqli::query(): Couldn’t fetch mysqli in C:\Program Files (x86)\EasyPHP-DevServer-13.1VC9\data\localweb\my portable files\class_EventCalendar.php on line 43

以下是我的连接文件：

if(!isset($_SESSION))

{

session_start();

}

// Create array to hold error messages (if any)

$ErrorMsgs = array();

// Create new mysql connection object

$DBConnect = @new mysqli("localhost","root@localhost",

NULL,"Ladle");

// Check to see if connection errno data member is not 0 (indicating an error)

if ($DBConnect->connect_errno) {

// Add error to errors array

$ErrorMsgs[]="The database server is not available.".

" Connect Error is ".$DBConnect->connect_errno." ".

$DBConnect->connect_error.".";

}

?>

这是我的班级：

class EventCalendar {

private $DBConnect = NULL;

function __construct() {

// Include the database connection data

include("inc_LadleDB.php");

$this->DBConnect = $DBConnect;

}

function __destruct() {

if (!$this->DBConnect->connect_error) {

$this->DBConnect->close();

}

}

function __wakeup() {

// Include the database connection data

include("inc_LadleDB.php");

$this->DBConnect = $DBConnect;

}

// Function to add events to Zodiac calendar

public function addEvent($Date, $Title, $Description) {

// Check to see if the required fields of Date and Title have been entered

if ((!empty($Date)) && (!empty($Title))) {

/* if all fields are complete then they are

inserted into the Zodiac event_calendar table */

$SQLString = "INSERT INTO tblSignUps".

" (EventDate, Title, Description) ".

" VALUES('$Date', '$Title', '".

$Description."')";

// Store query results in a variable

$QueryResult = $this->DBConnect->query($SQLString);

我对OOP PHP不太满意,我不确定为什么会出现这个错误.我从其他地方提取了这个代码,我唯一改变的是@new mysqli参数.任何人都可以帮我理解出了什么问题吗？