PHP CURL和DOMDocument錯誤

Question

我想提取curl和DOMDocument的信息，我必須提取一個div層的所有鏈接。

但沒有顯示任何東西，我不明白，因爲沒有捲曲，如果它的作品。

function media_uri_request($url, $method='', $vars='') 
    { 
     $ch = curl_init(); 
     if ($method == 'post') 
     { 
     curl_setopt ($ch, CURLOPT_POST, 1); 
     curl_setopt ($ch, CURLOPT_POSTFIELDS, $vars); 
     } 

     curl_setopt ($ch, CURLOPT_URL, $url); 
     curl_setopt ($ch, CURLOPT_HEADER, false); 
     curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true); 
     curl_setopt ($ch, CURLOPT_FAILONERROR, false); 
     curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, true); 
     curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, false); 
     curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7"); 
     curl_setopt ($ch, CURLOPT_HTTPHEADER, array("REMOTE_ADDR: ".$_SERVER['REMOTE_ADDR'], "HTTP_X_FORWARDED_FOR: ".$_SERVER['REMOTE_ADDR'])); 
     curl_setopt ($ch, CURLOPT_COOKIEJAR, 'tmp/cookie.txt'); 
     curl_setopt ($ch, CURLOPT_COOKIEFILE, 'tmp/cookie.txt'); 
     curl_setopt ($ch, CURLOPT_MAXREDIRS, 10); 
     curl_setopt ($ch, CURLOPT_TIMEOUT, 0); 
     curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 0); 
     $buffer = curl_exec($ch); 
     curl_close ($ch); 

     if (isset($buffer) && filter_var($buffer, FILTER_SANITIZE_URL)) { 
     $urls = Array(); 

     $dom = new DOMDocument(); 
     @$dom->loadHTMLFile($buffer); 

     foreach($dom->getElementsByTagName('a') as $buffer) { 
      $urls[] = Array(
       'name' => $buffer->nodeValue, 
       'href' => $buffer->getAttribute('href'), 
       'title' => $buffer->getAttribute('title'), 
       'rel' => $buffer->getAttribute('rel'), 
       'id' => $buffer->getAttribute('id'), 
      ); 
     } 
     return $urls; 
    } 
    } 

當前顯示我頁面上的所有鏈接，但我只需要一個div的id並獲取此鏈接。

<div id="something"> 
<a href="anylink">sometitle</a> 
<a href="anylink">sometitle</a> 
<a href="anylink">sometitle</a> 
<a href="anylink">sometitle</a> 
</div> 

你能幫助我嗎？

Answer 1

更換

foreach($dom->getElementsByTagName('a') as $buffer) { 

與

foreach($dom->getElementById('something')->getElementsByTagName('a') as $buffer) { 

這樣做，你先找到它的id div和再搜索其子女的鏈接。閱讀DOMDocument :: getElementById（）瞭解更多信息。

有一種不同的方式：

$xpath = new DOMXPath($dom); 
$elements = $xpath->query("//*[@id=something]"); 
if ($elements->length > 0) { 
    foreach ($elements->item(0)->getElementsByTagName('a') as $buffer) { 

此外，使用@$dom->loadHTML($buffer); - 你從一個字符串加載HTML，而不是從一個文件。