preg_replace内容返回

my data in mysql contains (in row):

text text text text
<img border="0" src="http://img713.imageshack.us/img713/3397/image22232822360.jpg" /><br />
<br />
OMG BIG TEXT<br />
<br />
text text text etc.

It's possbile remove any/everyting content and only leave:

<img border="0" src="http://img713.imageshack.us/img713/3397/image22232822360.jpg" />

If yes, how should it look like ?

preg_match('/<img([^>]*)>/i',$string, $match);

$match[0] will have your value;