相关疑难解决方法(0)

这是我的代码:

include 'conn.php';
$conn = new Connection();
$query = 'SELECT EmailVerified, Blocked FROM users WHERE Email = ? AND SLA = ? AND `Password` = ?';
$stmt = $conn->mysqli->prepare($query);
$stmt->bind_param('sss', $_POST['EmailID'], $_POST['SLA'], $_POST['Password']);
$stmt->execute();
$result = $stmt->get_result();

我在最后一行得到错误:调用未定义的方法mysqli_stmt :: get_result()

这是conn.php的代码:

define('SERVER', 'localhost');
define('USER', 'root');
define('PASS', 'xxxx');
define('DB', 'xxxx');
class Connection{
    /**
     * @var Resource 
     */
    var $mysqli = null;

    function __construct(){
        try{
            if(!$this->mysqli){
                $this->mysqli = new MySQLi(SERVER, USER, PASS, DB);
                if(!$this->mysqli)
                    throw new Exception('Could not create connection using …

我已经在网上搜索了一个很好的例子,但我找不到任何东西.

我试图扩展mysqli类来创建一个帮助类,它将抽象出一些复杂性.我想要完成的主要事情之一是使用准备好的陈述.

我真的不知道从哪里开始,或者如何在一个类中正确处理输入和输出.另一个问题是,在使用预准备语句时,我无法将数据作为数组输出.

我真的可以用一个简单的例子来指出我正确的方向.

谢谢!

可能重复:
动态绑定mysqli_stmt参数然后绑定结果(PHP)

任何人都可以帮助我如何在PHP上创建动态bind_result.我的查询字段不知道自动态创建以来有多少字段(例如,根据日期范围创建年份字段).下面是我的脚本,并突出显示问题在哪里.

public function getMarketingReports($datefrom,$dateto)
    {
        $yearfrom = date("Y", strtotime($datefrom));
        $yearto = date("Y", strtotime($dateto));

        //create year fields
        $concatYear = "";
        for($year=$yearfrom;$year<=$yearto;$year++){
            $concatYear .= "SUM(IF(c.datecreated='".$year."',IF(LOWER(c.fullTimeEployeeType)='basic hour rate', c.fullTimeEployeeTypeAmount*2080 , c.fullTimeEployeeTypeAmount),0)) ".$year.",";
        }


        $reportdata = array();
        $db = Connection::Open();
        $stmt = $db->stmt_init();
        if($stmt->prepare("SELECT p.Code `PositionCode`,
                                  p.name `PositionName`,
                                  l.value `Location`,
                                  ".$concatYear."
                                  SUM(b.field205) `TotalEmployees`
                             FROM c1 c
                            INNER JOIN b1 b
                               ON c.registrationid=b.id
                            INNER JOIN positions p
                               ON c.positionid=p.id
                            INNER JOIN lookupvalues l
                               ON c.location=l.id
                            WHERE c.`status`!=2
                              AND c.datecreated BETWEEN ? AND ? …