将新值插入 php mysql DB

Question

花点时间看一下我的代码，我无法将变量 dbentry 放入数据库中。

受保护的函数 moveFile($file) {

    $filename = isset($this->newName) ? $this->newName : $file['name'];
    $success = move_uploaded_file($file['tmp_name'], $this->destination . $filename);
    if ($success) {
        $result = $file['name'] . ' was uploaded successfully';
        if (!is_null($this->newName)) {
            $result .= ', and was renamed ' . $this->newName;
            $dbentry = $this->newName;
                echo "$dbentry";

                        $mysqli = new mysqli("localhost", "DBNAME", "PASSWORD", "USERNAME"); 
                        // Check connection
                        if($mysqli === false){
                            die("ERROR: Could not connect. " . $mysqli->connect_error);
                        } 
                        // attempt insert query execution
                        $sql = "INSERT INTO files (file_name) VALUES ('$dbentry')";
                        if($mysqli->query($sql) === true){
                            echo "Records inserted successfully.";
                        } else{
                            echo "ERROR: Could not  execute " . $mysqli->error;
                        }
                        // Close connection
                        $mysqli->close();

                //
        }
        $result .= '.';
        $this->messages[] = $result;
    } else {
        $this->messages[] = 'Could not upload ' . $file['name'];
    }
}

Answer 1

根据documentation 创建连接的人：

$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'my_db');

你确定你的论点顺序正确吗？

那么官方检查连接状态的方法是：

if ($mysqli->connect_error) {
    die('Connect Error (' . $mysqli->connect_errno . ') '
            . $mysqli->connect_error);
}