从 PHP 中的类创建对象会导致对象具有相同的数据

Question

我的课程有问题。我写了一个班级项目。当我从这个类创建对象时，创建一个没有问题，但是更多的对象会导致使用上一个对象的数据初始化所有以前的对象。

这就是我创建对象的方式：

$a = new Item(1, 111, 123, "Laptop", "NOT HP ProBook 450 G1, E9Y47EA", "kom.", 1, 20500, 25000, 18, 12, 1);

因此，如果我将其打印到屏幕上，一切都会好起来的，ti 将给出以下信息：

Item: | 00001 | Laptop___________________ NOT HP ProBook 450 G1, E9Y47EA____________________ | Units: kom. Availability: 0001 - 20.500,00 - 25.000,00 || G: 12 months

但如果我创建另一个 Item 对象：

$b = new Item(2, 222, 456, "DESKTOP", "blah", "kom.", 2, 41000, 46000, 18, 12, 1);

当回应他们时，我得到：

Item: | 00002 | DESKTOP__________________ blah______________________________________________ | Units: kom. Availability: 0002 - 41.000,00 - 46.000,00 || G: 12 months

Item: | 00002 | DESKTOP__________________ blah______________________________________________ | Units: kom. Availability: 0002 - 41.000,00 - 46.000,00 || G: 12 months

如您所见，看起来它们都使用相同的数据进行了初始化。

任何人，有什么想法吗？

提前致谢！

require_once("item.interface.php");
require_once("../conf/numberFormat.config.php");

//class item

class Item implements iItem
{
private static $id; //int
private static $cipher; //int
private static $serialNumber; //big int
private static $name; //string
private static $description; //text
private static $unit; //measurment unit
private static $quantity; //int
private static $price; //double
private static $recomendedPrice; //double
private static $vat; //tiny int
private static $guarantee; //tiny int
private static $warehouse; //small int

//formatting
private static $decimalPoint;
private static $decimals;
private static $thousandSeparator;

public function Item($id, $cipher, $serialNumber, $name, $description, $unit,       $quantity, $price, $recomendedPrice,
    $vat, $guarantee, $warehouse)
{
    self::$id = $id;
    self::$cipher = $cipher;
    self::$serialNumber = $serialNumber;
    self::$name = $name;
    self::$description = $description;
    self::$unit = $unit;
    self::$quantity = $quantity;
    self::$price = $price;
    self::$recomendedPrice = $recomendedPrice;
    self::$vat = $vat;
    self::$guarantee = $guarantee;
    global $decimalPoint;
    self::$decimalPoint = $decimalPoint;
    global $decimals;
    self::$decimals = $decimals;
    global $thousandSeparator;
    self::$thousandSeparator = $thousandSeparator;
    self::$warehouse = $warehouse;
}

//set methods
public function setId($id)
{
    self::$id = $id;
}

public function setCipher($cipher)
{
    self::$cipher = $cipher;
}

public function setSerialNumber($serialNumber)
{
    self::$serialNumber = $serialNumber;
}

public function setName($name)
{
    self::$name = $name;
}

public function setDescription($description)
{
    self::$description = $description;
}

public function setUnit($unit)
{
    self::$unit = $unit;
}

public function setQuantity($quantity)
{
    self::$quantity = $quantity;
}

public function setPrice($price)
{
    self::$price = $price;
}

public function setRecomendedPrice($recomendedPrice)
{
    self::$recomendedPrice = $recomendedPrice;
}

public function setVat($vat)
{
    self::$vat = $vat;
}

public function setGuarantee($guarantee)
{
    self::$guarantee = $guarantee;
}

public function setWarehouse($warehouse)
{
    self::$warehouse = $warehouse;
}

//get methods
public function getId()
{
    return self::$id;
}

public function getCipher()
{
    return self::$cipher;
}

public function getSerialNumber()
{
    return self::$serialNumber;
}

public function getName()
{
    return self::$name;
}

public function getDescription()
{
    return self::$description;
}

public function getUnit()
{
    return self::$unit;
}

public function getQuantity()
{
    return self::$quantity;
}

public function getPrice()
{
    return self::$price;
}

public function getRecomendedPrice()
{
    return self::$recomendedPrice;
}

public function getVat()
{
    return self::$vat;
}

public function getGuarantee()
{
    return self::$guarantee;
}

public function getWarehouse()
{
    return self::$warehouse;
}

//other methods
public function toString()
{
    global $ITEM;
    return ucfirst($ITEM).": | " . sprintf("%05d", self::$id) . " | " . STR_PAD(self::$name, 25, "_") .
        " <i>" . STR_PAD(self::$description, 50, "_") . "</i> | Units: ".self::$unit." Availability: " .
        sprintf("%04d", self::$quantity) . " - " . self::formatPrice(self::$price) .
        " - " . self::formatPrice(self::$recomendedPrice) . " || G: " . self::$guarantee .
        " months";
}

public function toHTML()
{
    return false;
}

private function formatPrice($input)
{
    return number_format($input, self::$decimals, self::$decimalPoint, self::$thousandSeparator);
}
}

Answer 1

这是由于您的属性（变量）是静态的。

阅读类属性

http://www.php.net/manual/en/language.oop5.properties.php