卷曲多重网址无法执行

Question

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我写的follwing代码用curl执行多个url。

首先在阵列中存储网址。

并执行我使用foreach。

但我不知道为什么不能从网址获取数据？

$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); 
} 

决赛：

网址：

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

没有表行发现

Answer 1

好了，问题是，你正在做一个HEAD请求。这是这条线所做的：curl_setopt($ch, CURLOPT_NOBODY, 1);（基本上删除身体）。此外，在文件的后面，您还可以拨打curl_setopt($ch, CURLOPT_HEADER, 1);，它返回服务器返回的标题。看看你的代码，它看起来像你实际上只想从你请求的URI获取XML，而不是标题。所以删除这两行，你应该得到你期望的XML