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:<?phpif(!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.".";}?>这是我的课: <?php 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);我不擅长 OOP PHP，我不确定为什么会出现这个错误.我从别处提取了这段代码，唯一改变的是 @new mysqli 参数.任何人都可以帮助我了解出了什么问题吗?I'm not great with OOP PHP and I'm not sure why this error is being raised. I pulled this code from elsewhere and the only thing I changed was the @new mysqli parameters. Can anyone help me to understand what is going wrong?推荐答案可能在某处你有 DBconnection->close(); 然后一些查询尝试执行.Probably somewhere you have DBconnection->close(); and then some queries try to execute .提示:在__destruct()中插入...->close();有时是错误的)(因为__destruct是事件，之后需要执行查询)Hint: It's sometimes mistake to insert ...->close(); in __destruct() (because __destruct is event, after which there will be a need for execution of queries) 这篇关于mysqli::query(): 无法获取 mysqli的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！