常量表达式包含无效运算-不突出显示其他变量? [英] Constant expression contains invalid operations - Not highlighting other variable?

问题描述

我必须将Twig模板转换回网站的PHP，所以我们基本上是在模仿功能.我从PHP中得到一个错误，突出显示了我的类属性$ link，该属性包含其他变量数组.

I have to convert Twig template back into PHP for a site so we are basically mimicking the functionality. I'm getting an error from PHP highlighting my class property $link which contains an array of other variables.

常量表达式包含无效的操作

Constant expression contains invalid operations

我不明白为什么要突出显示此属性，而不是突出显示我的其他属性，直接位于名为$ downloadLink的下面.两者都是数组，除非我遗漏了一些东西.该错误最初并未突出显示，但直到后来我继续其余代码时才突出显示.

I don't understand why it is highlighting this property but not my other property directly underneath named $downloadLink. Both are arrays, unless I'm missing something. This error did not highlight initially but only later as I continued the rest of my code.

class Card {

public $title;
public $image;
public $text;

public $link = array(
    $url,
    $nale,
);

public $downloadLink = array(
    $url,
    $title,
    $type,
    $weight,
);



function __construct(string $title, string $image, string $text, array $link_arr, array $downloadLink_arr)
{
    $this->title = $title;
    $this->image = $image;
    $this->text = $text;
    $this->link->url = $link_arr[0];
    $this->link->nale = $link_arr[1];
    $this->downloadLink->url = $downloadLink_arr[0];   
    $this->downloadLink->title = $downloadLink[1];   
    $this->downloadLink->type = $downloadLink[2];   
    $this->downloadLink->weight = $downloadLink[3];   
}

}

推荐答案

这是PHP的基本知识.

This is a PHP basic stuff.

您不能使用变量来初始化变量，并且当变量是数组时，您将尝试使用对象分配.

You can't initialize variables with variables and you are trying to use Object assignments when your variable is an array.

<?php

class Card
{
    public $title;
    public $image;
    public $text;
    public $link = array();
    public $downloadLink = array();

    public function __construct(string $title, string $image, string $text, array $link_arr, array $downloadLink_arr)
    {
        $this->title = $title;
        $this->image = $image;
        $this->text = $text;
        $this->link['url'] = $link_arr[0];
        $this->link['nale'] = $link_arr[1];
        $this->downloadLink['url'] = $downloadLink_arr[0];
        $this->downloadLink['title'] = $downloadLink[1];
        $this->downloadLink['type'] = $downloadLink[2];
        $this->downloadLink['weight'] = $downloadLink[3];
    }
}

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