PHP 访问未声明的静态属性
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/27670284/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
PHP Access to Undeclared Static Property
提问by Yaakov Schectman
I've made a class in PHP and I'm getting a Fatal Error(Title) on the line marked with an asterisk(*)
我已经在 PHP 中创建了一个类，但在标有星号 (*) 的行上出现了致命错误 (Title)
class monster{
private $id = 0;
private $name = "";
private $baseLevel = 0;
private $attack = 0;
private $defense = 0;
private $baseEXP = 0;
private $dropType = 0;
private $dropNum = 0;
function __construct($a, $b, $c, $d, $e, $f, $g, $h){
* self::$id=$a;
self::$name = $b;
self::$baseLevel = $c;
self::$attack = $d;
self::$defense = $e;
self::$baseEXP = $f;
self::$dropType = $g;
self::$dropNum = $h;
}
}
I can't figure out what's causing it, also, the following class(same file) is returning the same error.
我无法弄清楚是什么导致了它，而且，以下类（同一文件）返回相同的错误。
class item{
private $id = 0;
private $name = "";
private $type = 0; #0-weapon, 1-armor, 2-charm, 3-ability
private $ability = 0;
private $desc = "";
private $cost = 0;
function __construct($a, $b, $c, $d, $e, $f){
self::$id=$a;
self::$name=$b;
self::$type=$c;
self::$ability=$d;
self::$desc=$e;
self::$cost = $f;
}
}
Do you happen to know what's causing the error or how I can fix it?
您是否知道导致错误的原因或我如何修复它？
回答by Dmitri Kadykov
You should declare your properties with keyword static, e.g.
您应该使用关键字 static 声明您的属性，例如
static private $id = 0;
回答by Ryan Printup
Use $this->instead of self::
使用$this->代替self::
Selfis for static members and $thisis for instance variables.
Self用于静态成员，$this用于实例变量。
