Question

我正试图从Alexa排名网址中获取xml数据

http://data.alexa.com/data?cli=10&dat=s&url=google.com

这个单独的url工作正常，但是当我在数组中获得多个url并循环遍历foreach时，它仅显示数组中最后一个url的数据。我正在使用的代码是

$list = file_get_contents("sites.txt");
$urls = explode ("\n", $list);


foreach ($urls as $url) {
echo $url;echo "<br />";
$uri = 'http://data.alexa.com/data?cli=10&dat=s&url=';
$uri .= $url;
$xml = simplexml_load_file($uri,"SimpleXMLElement",LIBXML_NOCDATA);

print_r($xml); 
if (isset($xml->SD[1])){
$data = (int) $xml->SD[1]->POPULARITY->attributes()->TEXT;
print_r($data);
}
else {echo "Not Found";echo "<br />";}  

}

sites.txt包含

google.com
facebook.com
archive.com
adjustedreality.com
adkforum.com

结果是

google.com 
SimpleXMLElement Object ( [@attributes] => Array ( [VER] => 0.9 [URL] => 404 [HOME] => 0 [AID] => = [IDN] => ) [0] => ) Not Found
facebook.com 
SimpleXMLElement Object ( [@attributes] => Array ( [VER] => 0.9 [URL] => 404 [HOME] => 0 [AID] => = [IDN] => ) [0] => ) Not Found
archive.com 
SimpleXMLElement Object ( [@attributes] => Array ( [VER] => 0.9 [URL] => 404 [HOME] => 0 [AID] => = [IDN] => ) [0] => ) Not Found
adjustedreality.com 
SimpleXMLElement Object ( [@attributes] => Array ( [VER] => 0.9 [URL] => 404 [HOME] => 0 [AID] => = [IDN] => ) [0] => ) Not Found
adkforum.com
SimpleXMLElement Object ( [@attributes] => Array ( [VER] => 0.9 [URL] => adkforum.com/ [HOME] => 0 [AID] => = [IDN] => adkforum.com/ ) [SD] => Array ( [0] => SimpleXMLElement Object ( [@attributes] => Array ( [TITLE] => A [FLAGS] => [HOST] => adkforum.com ) [0] => ) [1] => SimpleXMLElement Object ( [POPULARITY] => SimpleXMLElement Object ( [@attributes] => Array ( [URL] => adkforum.com/ [TEXT] => 2054938 [SOURCE] => panel ) ) [REACH] => 
SimpleXMLElement Object ( [@attributes] => Array ( [RANK] => 2100659 ) ) [RANK] => SimpleXMLElement Object ( [@attributes] => Array ( [DELTA] => +800368 ) ) ) ) ) 2054938

sites.txt包含2个或200个url无关紧要，它将仅显示列表/数组中最后一个url的数据。

Answer 1

由于文件中可能包含其他奇数字符（包括\ r，空格等），因此最好使用trim() ...

清理URL。

$uri .= trim($url);

simplexml_load_file不会使用数组获取数据

1 个答案: