php/regex: separate feed data

<description>&lt;img src='http://example.com/Pic_018_70x70.gif'&gt;&lt;/img&gt;&lt;br /&gt;This is the content of the desc开发者_运维问答ription.</description>

If I have images coming in the description field of a feed, how can I separate the image into a variable and strip the noise and have the description left too?

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This will give you the value of the img src attribute from the string in your question, and give you the text:

$sxml = new SimpleXMLElement(html_entity_decode($str));
$images = $sxml->xpath('//@src');
$text = $sxml->xpath('//description');

echo $images[0];  // http://example.com/Pic_018_70x70.gif
echo $text[0];    // This is the content of the description.

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You could also use simplexml

$xml = simplexml_load_string($string);
$description = $xml->description;