每当我将数据插入数据库时​​，我都会看到数据需要的空白区域

Question

我对此主题有疑问。事情如下，我目前是面向对象的PHP编程的初学者，我在编码时遇到了一个问题。当我开始INSERT INTO'dB name'时它起作用了。但问题是每当我去PHPmyAdmin时，我都会看到空白区域，我的数据应该是。

<?php
ini_set("display_errors", "On");
error_reporting(E_ALL);



class DBinject{


 public $naamroute;
 public $soortroute;
 public $tijdsduur;
 public $lengteroute;


public function setroutename($routename){
    if(!is_string($routename) || empty($routename)){
        return false;
    }
    $this->naamroute = $routename;
}
public function setroute($route){
    if(!is_string($route) || empty($route)){
        return false;
    }
    $this->soortroute = $route;
}
public function settimelength($timelength){
      if(!is_string($timelength) || empty($timelength)){
          return false;
    }
    $this->tijdsduur = $timelength;
}
public function setroutelength($routelength){
    if(!is_string($routelength) || empty($routelength)){
        return false;
    }
    $this->routelengte = $routelength;
} 

public function Opslaan(){ 

    $conn = new mysqli("localhost", "root", "root", "fietsroutes");

    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } else {
        echo"Connected succesfully.";
    }


    $query = "INSERT INTO fietsroutes (naamroute, soortroute, tijdsduur, lengteroute)
    VALUES('$this->naamroute', '$this->soortroute', '$this->tijdsduur', '$this->lengteroute')";
    $result = $conn->query($query);

    return $result;
    }
}



 $conn = new DBinject();

    $conn->setnaamroute($_POST['routename']); 
    $conn->setsoortroute($_POST['route']); 
    $conn->settijdsduur($_POST['timelength']);
    $conn->setlengteroute($_POST['routelength']);

 $conn->Opslaan();

?>

凸块

Answer 1

您实际上从未在您提供的代码中为变量('$this->naamroute', '$this->soortroute', '$this->tijdsduur', '$this->lengteroute')提供任何值，因此您实际上是将空值放入数据库。

Answer 2

您的表名和数据库名是否相同？正如你所说的那样，你正在解雇＆＃34; INSERT INTO＆＃39; dB名称＆＃39;＆＃34;所以请尝试INSERT INTO＆＃39; table-name＆＃39;我认为这是问题..