使用简单的html dom的php webscraping在输出无序的html标签时不起作用

概述我想废弃网页的一些信息.它使用表格布局结构. 我想在嵌套表格布局中提取第三个表格,其中包含一系列嵌套表格.每个发布一个结果.但代码不起作用 include('simple_html_dom.php');$url = 'http://exams.keralauniversity.ac.in/Login/index.php?reslt=1';$html = file_get_contents($u 我想废弃网页的一些信息.它使用表格布局结构.

我想在嵌套表格布局中提取第三个表格,其中包含一系列嵌套表格.每个发布一个结果.但代码不起作用

include('simple_HTML_dom.PHP');$url = 'http://exams.keralauniversity.ac.in/Login/index.PHP?reslt=1';$HTML = file_get_contents($url);$result =$HTML->find("table",2);echo $result;

我使用Curl来提取网站,但问题是它的标签是乱序的,因此无法使用简单的dom元素提取它.

function curl($url) {            $ch = curl_init();  // Initialising cURL            curl_setopt($ch,CURLOPT_URL,$url);    // Setting cURL's URL option with the $url variable passed into the function            curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE); // Setting cURL's option to return the webpage data            $data = curl_exec($ch); // Executing the cURL request and assigning the returned data to the $data variable            curl_close($ch);    // Closing cURL            return $data;   // Returning the data from the function        }          function scrape_between($data,$start,$end){        $data = stristr($data,$start); // StripPing all data from before $start        $data = substr($data,strlen($start));  // StripPing $start        $stop = stripos($data,$end);   // Getting the position of the $end of the data to scrape        $data = substr($data,$stop);    // StripPing all data from after and including the $end of the data to scrape        return $data;   // Returning the scraped data from the function    }          $scraped_page  = curl($url);  // Executing our curl function to scrape the webpage http://www.example.com and return the results into the $scraped_website variable           $scraped_data = scrape_between($scraped_page,' </HTML>','</table></td><td></td></tr>   </table>');   echo $scraped_data; $myfile = fopen("newfile.HTML","w") or dIE("Unable to open file!");fwrite($myfile,$scraped_data);fclose($myfile);

如何刮取结果并保存pdf

解决方法 简单的HTML Dom无法处理该HTML.所以先切换到 this library,
然后做：

require_once('advanced_HTML_dom.PHP');$dom = file_get_HTML('http://exams.keralauniversity.ac.in/Login/index.PHP?reslt=1');$rows = array();foreach($dom->find('tr.Function_Text_normal:has(td[3])') as $tr){  $row['num'] = $tr->find('td[2]',0)->text;  $row['text'] = $tr->find('td[3]',0)->text;  $row['pdf'] = $tr->find('td[3] a',0)->href;  if(preg_match_all('/\d+/',$tr->parent->find('u',0)->text,$m)){    List($row['day'],$row['month'],$row['year']) = $m[0];  }  // uncomment next 2 lines to save the pdf  // $filename = preg_replace('/.*\//','',$row['pdf']);  // file_put_contents($filename,file_get_contents($row['pdf']));  $rows[] = $row;}var_dump($rows);

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