What is wrong with regex pattern that I created:

$link_image_pattern = '/\<a\shref="([^"]*)"\>\<img\s.+\><\/a\>/';
preg_match_all($link_image_pattern, $str, $link_images);

What I'm trying to do is to match all the links which has images inside of them. But when I try to output $link_images it contains everything inside the first index:

<pre>
  <?php print_r($link_images); ?>
</pre>

The markup looks something like this:

Array ( [0] => Array ([0] => "

<p>&nbsp;</p>

<p><strong><a href="url">Title</a></strong></p>

<p>Desc</p>

<p><a href="{$image_url2}"><img style="background-image:none;padding-left:0;padding-right:0;display:inline;padding-top:0;border-width:0;" title="image" border="0" alt="image" src="{$image_url2}" width="569" height="409"></a></p>

But when outputting the contents of the matches, it simply returns the first string that matches the pattern plus all the other markup in the page like this:

<a href="{$image_url}"><img style="background-image:none;padding-left:0;padding-right:0;display:inline;padding-top:0;border-width:0;" title="image" border="0" alt="image" src="{$image_url}" width="568" height="347"></a></p>

    <p>&nbsp;</p>

    <p><strong><a href="url">Title</a></strong></p>

    <p>Desc</p>

    <p><a href="{$image_url2}"><img style="background-image:none;padding-left:0;padding-right:0;display:inline;padding-top:0;border-width:0;" title="image" border="0" alt="image" src="{$image_url2}" width="569" height="409"></a></p>")