php - Can you please help me see the regular rules for a crawler to capture the data it needs?

Question

A. The html of the page to be crawled: {code...} B. The crawling rule I wrote: {code...} $reg_list = "/&lt;div\s*topClassName\='top1'\s *topSwitch\='on'\s*productId\='(\d+)'\s*productName\='[\x7f-\xff]+'\s*class\='productP...

黄舟 · Answer

It’s time to use the symfony/dom-crawler method again. DOM Dafa is good, if you retreat from the rules, you will stay safe

composer.json

{
    "require": {
        "symfony/css-selector": "^3.2",
        "symfony/dom-crawler": "^3.2"
    }
}

a.php


    

        
            
                
                    
                        
                            
                                
                            
                        
                    
                
            

            
                
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EOT;

$dom = new Crawler();

$dom->addHtmlContent($str2, 'UTF-8');

$imgSrc = $dom->filter('td.imgp')->filter('img')->attr('src');

$productName = $dom->filter('td.propList')->filter('p.productName>a')->text();

$productProp6 = $dom->filter('td.propList')->filter('p.productProp6>.propValue')->text();

$productProp4 = $dom->filter('td.propList')->filter('p.productProp4>.propValue')->text();

var_dump($imgSrc);
echo '
';
var_dump($productName);
echo '
';
var_dump($productProp6);
echo '
';
var_dump($productProp4);
echo '
';

Output

巴扎黑 · Answer

DOM is naturally a better choice, but it’s not necessarily impossible to do it with regular methods.

/alt=\'(?P[^\']+)\'(?:.+?)?src=\'(?P[^\']+)\'(?:.+?)?主营：(?:.+?)?\'>(?P[^<]+)(?:.+?)?地址：(?:.+?)?\'>(?P[^<]+)/s

php - Can you please help me see the regular rules for a crawler to capture the data it needs?

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