PHP 类不存储引用 [英] PHP class not storing reference

问题描述

如何将引用传递给对象构造函数，并允许该对象更新该引用?

How do I pass a reference to an object constructor, and allow that object to update that reference?

class A{
    private $data;
    function __construct(&$d){
        $this->data = $d;
    }
    function addData(){
        $this->data["extra"]="stuff";
    }
}

// Somewhere else
$arr = array("seed"=>"data");
$obj = new A($arr);
$obj->addData();

// I want $arr to contain ["seed"=>"data", "extra"=>"stuff"]
// Instead it only contains ["seed"=>"data"]

推荐答案

您必须将其存储在任何地方作为参考.

You must store it everywhere as a reference.

function __construct (&$d) {
    $this->data = &$d; // the & here
}

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