Код:
sort( $images );
$offset = $perpage * abs( $page - 1 );
$count = count( $images );
$limit = ( ($offset + $perpage) > $count ) ? $count:$offset + $perpage;
for ( $i = $offset; $i < $limit; $i++ ) {
$size = getimagesize('kartinki/'.$images[$i]);
$content .= "\n<img src='".HTTP_HOME_URL."/kartinki/{$images[$i]}' {$size[3]} alt='' />";
}