类内的PHP全局变量作用域 [英] PHP global variable scope inside a class

问题描述

我有以下脚本

myclass.php

myclass.php

<?php

$myarray = array('firstval','secondval');

class littleclass {
  private $myvalue;

  public function __construct() {
    $myvalue = "INIT!";
  }

  public function setvalue() {
    $myvalue = $myarray[0];   //ERROR: $myarray does not exist inside the class
  }
}

?>

有没有一种方法可以通过简单的声明使$ myarray在littleclass内部可用？如果可能的话，我不想将其作为参数传递给构造函数。

Is there a way to make $myarray available inside the littleclass, through simple declaration? I don't want to pass it as a parameter to the constructor if that was possible.

此外，我希望您实际上可以使全局变量对php类可见某种程度上，但这是我第一次遇到这个问题，所以我真的不知道。

Additionally, I hope that you actually CAN make global variables visible to a php class in some manner, but this is my first time facing the problem so I really don't know.

推荐答案

include 全局$ myarray 在 setvalue（）函数的开头。

include global $myarray at the start of setvalue() function.

public function setvalue() {
    global $myarray;
    $myvalue = $myarray[0];
}

更新：

如评论中所述，这是一种不好的做法，应该避免。

更好的解决方案是： https://stackoverflow.com/a/17094513/3407923 。

UPDATE:
As noted in the comments, this is bad practice and should be avoided.
A better solution would be this: https://stackoverflow.com/a/17094513/3407923.

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