查找和存储(regex、php)

$tags = array('foo', 'bar', 'profile-blah');
$found = preg_grep('~^profile~', $tags);
if($found)
   $profile_name = substr(end($found), strlen('profile-'));

function find_profile_name($posttags) {
   foreach($posttags as $tag)
      if(preg_match('~^profile-(.+)~', $tag->slug, $m))
          return $m[1];
   return null; // no profile-... found
}