裏面調用一個函數功能laravel 5.4

Question

我以前的問題是這個parse the html data to array data in php

參照此Answer，我是想同樣的事情在laravel。它的實施給我的錯誤一樣DOMXPath::query(): Unable to call handler hasClasses()然後，我使用類似下面

我laravel代碼：

function hasClasses($attrValue, $requiredClasses) 
{ 
    $requiredClasses = explode(' ', $requiredClasses); 
    $classes = preg_split('~\s+~', $attrValue, -1, PREG_SPLIT_NO_EMPTY); 

    return array_diff($requiredClasses, $classes) ? false : true; 
} 


function getScrapedata($keyword = 'laravel') 
{ 
    $client = new Client(); 
    $client->setHeader('user-agent', "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/6.0.472.63 Safari/534.3"); 
    $crawler = $client->request('GET', 'http://duckduckgo.com/?q=' . $keyword); 
    $string = $crawler->filter('div#links.results')->html(); 

    $dom = new \DOMDocument; 
    $state = libxml_use_internal_errors(true); 
    $dom->loadHTML($string); 
    libxml_use_internal_errors($state); 

    $xp = new \DOMXPath($dom); 
    $xp->registerNamespace('php', 'http://php.net/xpath'); 
    $xp->registerPhpFunctions('hasClasses'); 

    $mainDivClasses = 'result results_links results_links_deep web-result'; 
    $childDivClasses = 'links_main links_deep result__body'; 

    $divNodeList = $xp->query('//div[php:functionString("' . $this->hasClasses('class', $mainDivClasses) . '")] 
           /div[php:functionString("' . $this->hasClasses('class', $mainDivClasses) . '")]'); 

    $array_data = []; 
    foreach ($divNodeList as $divNode) { 
     $array_data[] = [ 
      trim($xp->evaluate('string(./h2/a[@class="result__a"])', $divNode)), 
      trim($xp->evaluate('string(.//a[@class="result__snippet"])', $divNode)), 
      trim($xp->evaluate('string(.//a[@class="result__url"])', $divNode)), 
     ]; 
    } 

    dd($array_data); 
} 

因此然後開始給我另一個錯誤此DOMXPath::query(): Unable to call handler()

所以實際的錯誤是在這裏：

$divNodeList = $xp->query('//div[php:functionString("'.$this->hasClasses('class',$mainDivClasses).'")] 
           /div[php:functionString("'.$this->hasClasses('class',$mainDivClasses).'")]'); 

有人可以幫我了這一點。如何完全調用函數？你能解決這個

Answer 1

的一種方法是改變你的hasClasses方法是：

static function hasClasses($attrValue, $requiredClasses) 

那麼你應該能夠做到：

$divNodeList = $xp->query('//div[php:functionString("' . static::class . '::hasClasses", @class, "' . $mainDivClasses . '")] 
        /div[php:functionString("' . static::class . '::hasClasses", @class, "' . $childDivClasses . '")]'); 

希望這有助於！