Question

我正在尝试使用函数向类中的公共变量添加值。我不确定该怎么做。我目前的PHP代码如下：

class Truck {
public $Odometer = 0;
public $Model = 'Triton';
public $Price;
public $Horsepower;

public function __construct() {
  $this->Price = 30;
}
public function __construct() {
  $this->Horsepower = 205;
}
public function ShowOdometer() {
  echo "Odometer: ".$this->Odometer;
}
public function ShowModel() {
  echo "Model: ".$this->Model;
}
public function ShowPrice() {
  echo "Cost: ".$this->Price;
}
public function ShowHorsepower() {
  echo "Horsepower: ".$this->Horsepower
}
}

我试图通过一种方法为$ Price和$ Horsepower添加一个整数值。我试图使用__construct（），虽然这给了我一个致命的错误：Cannot redeclare Truck::__construct().

Answer 1

您在constructor内定义了两个class，因此错误为Fatal error: Cannot redeclare Truck::__construct()。试试 -

class Truck {
public $Odometer = 0;
public $Model = 'Triton';
public $Price;
public $Horsepower;

public function __construct() {
  $this->Price = 30;
  $this->Horsepower = 205;
}
public function ShowOdometer() {
  echo "Odometer: ".$this->Odometer;
}
public function ShowModel() {
  echo "Model: ".$this->Model;
}
public function ShowPrice() {
  echo "Cost: ".$this->Price;
}
public function ShowHorsepower() {
  echo "Horsepower: ".$this->Horsepower
}
}

PHP - 为类中的变量添加值

1 个答案: