将SimpleXMLElement对象[内容]元素合并到一个变量中

Question

Hello I have the following php code, from the output $doc I want to take all the [content] items and put them together for use in a tag cloud. How can I extract all the [content] items into one variable?

$ch = curl_init("http://api.sysomos.com/hb/v1/heartbeat/rss?startid=0&hbrss=DUpnCTqppKjx4q1U6FXd5SWOPFUa2ltLm1haXJAYi1hbmQtcS5jby51aw..&maxC=6&max=30&hid=2535&  fTs=me&dRg=7&tab=beats&scO=Recency&");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, 0);
$data = curl_exec($ch);
curl_close($ch);
$doc = new SimpleXmlElement($data, LIBXML_NOCDATA);
print_r($doc);

Answer 1

Without further clarification, it seems you're having trouble getting the string value of the individual <content> nodes? If so, consider the following:

$str = '
<xml>
  <content>content1</content>
  <somethingElse>DOH!</somethingElse>
  <content>content2</content>
  <content>content3</content>
</xml>
';

$doc = new SimpleXMLElement($str);
$vals = array();
foreach ($doc->content as $content) {
  $vals[] = (string) $content;
}

print_r($vals);

This will output:

Array
(
    [0] => content1
    [1] => content2
    [2] => content3
)

UPDATE

As per your comment, you could use the same tactic above with an additional implode call like so:

$vals = implode('', $vals);
echo $vals; // outputs: content1content2content3

Or, modify the original loop to do:

$vals = '';
foreach ($doc->content as $content) {
  $vals .= (string) $content;
}
echo $vals; // outputs: content1content2content3