XML data extraction of src="xyz" from description - php

Question

I am trying to incorporate my pin feed into my site. I have got it working but I need to amend what it shows as it's not quite working as intended.
What I need is to extract a certain piece of data from the description bit of the date.
This is the code I use to grab my XML feed:
<?php
$ch = curl_init("http://pinterest.com/1234/feed.rss");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, 0);
$data = curl_exec($ch);
curl_close($ch);
$doc = new SimpleXmlElement($data, LIBXML_NOCDATA);
if(isset($doc->channel))
{
parseRSS($doc);
}
function parseRSS($xml)
{
$cnt = 9;
for($i=0; $i<$cnt; $i++)
{
$url = $xml->channel->item[$i]->link;
$img = $xml->channel->item[$i]->description;
$title = $xml->channel->item[$i]->title;
echo '<p>'.$img.'</p>';
}
}
?>
The problem is that description looks like below and all I want is the src value from it:
<description><p><a href="/pin/1785432765530/"><img src="http://media-cache-ec1.pinterest.com/upload/27099622222548513383_qJV62266Pf_b.jpg"></a></p><p>What it takes to Google’s.</p></description>
Is there a way to just get src="http://media-cache-ec1.pinterest.com/upload/270996666522513383_qJV6666Pf_b.jpg" out of the description and store it in $img or another variable?

Answer 1

html_entity_decode and Simple HTML DOM parser could solve your problem.
(http://stackoverflow.com/questions/138313/how-to-extract-img-src-title-and-alt-from-html-using-php)

Answer 2

Some RegExp would help you (PHP Manual, Wikipedia)
eg.: .*(src=".*[^"]").*

Answer 3

thanks all i used
$cnt = 9;
for($i=0; $i<$cnt; $i++)
{
$url = $xml->channel->item[$i]->link;
$img = $xml->channel->item[$i]->description;
$title = $xml->channel->item[$i]->title;
$pattern = '/src="([^"]*)"/';
preg_match($pattern, $img, $matches);
$src = $matches[0];
unset($matches);
//echo $src;
echo '<p><img '.$src.'</img></p>';
}
}
?>
thanks for the tips