将食人反应数据推送到数组中，并将其传递以在laravel中查看 [英] Push the guzzle response data to array and pass it to view in laravel

问题描述

我可以通过控制器使用以下方法从网址中抓取数据:

I have the following method from my controller to scrap a data from a url:

    public function fetchFromUrl(Request $request)
    {
        $a =[];
        $goutteClient = new Client();
        $guzzleClient = new GuzzleClient([
            'timeout' => 60,
            'verify' => false
        ]);
        $goutteClient->setClient($guzzleClient);
        $crawler = $goutteClient->request('GET', 'https://html.duckduckgo.com/html/?q=Laravel');

        $crawler->filter('.result__title .result__a')->each(function ($node) use($a){
             $parts = parse_url(urldecode($node->attr('href')));
             parse_str($parts['query'], $params);
             $url = $params['uddg']; 
             array_push($a, $url);
                
            dump($url);
            //$title = $node->text();
        });
        dump($a);
        //return view('view')->withDatas($a);
    }

执行上述方法后，我想将提取的数据$url推送到数组$ a并将其传递给视图.但是我得到的只是一个空数组.

With the above method execution I want to push the extracted data $url to the array $a and pass it to the view. But all I get is an empty array.

我也想将$title推送到新数组并执行相同的操作.但是第一个无法正常工作，因此我已将其注释掉.

I also want to push $title to new array and do the same. But the first one is not working so I've commented it out.

推荐答案

$a数组正在多个范围内使用.当在内部范围"内使用时， (在each()中)将其复制到函数中.目的是在内部范围"内通过引用利用$a阵列.这是通过使用&符号&

The $a array is being utilized within multiple scopes. When used within the "inner scope" (within each()) it is copied into the function. The intent is to utilize the $a array by reference within the "inner scope". This is completed by utilizing the ampersand &

$crawler->filter($filter_string)
        ->each(function($node) use ($a) {
...

可以替换为:

$crawler->filter($filter_string)
        ->each(function($node) use (&$a) {

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