Question

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我编写了以下代码来执行curl的多个URL。

数组中的第一个商店网址。

并执行我使用foreach。

但我不知道为什么无法从网址获取数据？

$urls = array(
"http://emalls.ir/%D9%84%DB%8C%D8%B3%D8%AA-%D9%82%DB%8C%D9%85%D8%AA_%D9%84%D9%86%D8%B2-%D8%AF%D9%88%D8%B1%D8%A8%DB%8C%D9%86-%D9%81%DB%8C%D9%84%D9%85-%D8%A8%D8%B1%D8%AF%D8%A7%D8%B1%DB%8C~Category~643",
"http://emalls.ir/%D9%84%DB%8C%D8%B3%D8%AA-%D9%82%DB%8C%D9%85%D8%AA_%D9%84%D9%86%D8%B2-%D8%AF%D9%88%D8%B1%D8%A8%DB%8C%D9%86-%D9%81%DB%8C%D9%84%D9%85-%D8%A8%D8%B1%D8%AF%D8%A7%D8%B1%DB%8C~Category~643",
 );
    $browsers = array(

   "standard" => array (
    "user_agent" => "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13",
    "language" => "en-us,en;q=0.5"
    ),
 );

 foreach ($urls as $url) {

echo "URL: $url\n";

foreach ($browsers as $test_name => $browser) {

    $ch = curl_init();

    // set url
    curl_setopt($ch, CURLOPT_URL, $url);

    // set browser specific headers
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            "User-Agent: {$browser['user_agent']}",
            "Accept-Language: {$browser['language']}"
        ));

    // we don't want the page contents
    curl_setopt($ch, CURLOPT_NOBODY, 1);

    // we need the HTTP Header returned
    curl_setopt($ch, CURLOPT_HEADER, 1);

    // return the results instead of outputting it
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_ENCODING, 'UTF-8');

    $page = curl_exec($ch);
    $dom = new DOMDocument('1.0', 'utf-8');
    libxml_use_internal_errors(true);
    @$dom->loadHTML(mb_convert_encoding($page, 'HTML-ENTITIES', 'UTF-8'));
    libxml_clear_errors();
    $xpath = new DOMXpath($dom);


    $data = array();
 $table_rows = $xpath->query("//table[@id='grdprice']/tr"); // target the   row (the browser rendered <tbody>, but actually it really doesnt have one)

   if($table_rows->length <= 0) { // exit if not found
echo 'no table rows found';
exit;
 }

 foreach($table_rows as $tr) { // foreach row
  $row = $tr->childNodes;
  if($row->item(0)->tagName != 'th') { // avoid headers
    $data[] = array(


                     'title'  =>  trim($row->item(0)->nodeValue),
                     'sensor' =>  trim($row->item(2)->nodeValue),


      );
  }
 }

}

echo'<pre>';
print_r($data);
 }

最后：

URL：

http://emalls.ir/%D9%84%DB%8C%D8%B3%D8%AA-%D9%82%DB%8C%D9%85%D8%AA_%D9%84%D9%86%D8%B2-%D8%AF%D9%88%D8%B1%D8%A8%DB%8C%D9%86-%D9%81%DB%8C%D9%84%D9%85-%D8%A8%D8%B1%D8%AF%D8%A7%D8%B1%DB%8C~Category~643

找不到表格行

Answer 1

好的，问题是您正在执行HEAD请求。这就是这一行：curl_setopt($ch, CURLOPT_NOBODY, 1);（基本上删除了主体）。此外，稍后在文件中，您还会调用curl_setopt($ch, CURLOPT_HEADER, 1);，它将返回服务器返回的标头。查看您的代码，看起来您实际上只想从您要请求的URI中获取XML，而不是标头。所以删除这两行，你应该得到你期待的XML

Curl Multi url无法执行

1 个答案: