Обрезка аватара под квадратный вид

 
function usrImageNOdb($user_id, $small='small', $usr_imageurl, $usr_is_deleted, $width='', $height='', $custom_cls=''){
    if ($user_id == -1) { return '<img border="0" class="usr_img_small" src="/images/messages/update.jpg" />';	}
    if ($user_id == -2) { return '<img border="0" class="usr_img_small" src="/images/messages/massmail.jpg" />'; }
    if ($usr_imageurl){
        if($usr_is_deleted){
            if ($small=='small'){
                return '<img border="0" class="usr_img_small" width="64px" height="64px" src="/images/users/avatars/small/noprofile.jpg" />';
            } else {
                return '<img border="0" class="usr_img'.$custom_cls.'" width="'.$width.'" height="'.$height.'" src="/images/users/avatars/noprofile.jpg" />';
            }
        } else {
            if ($usr_imageurl && @file_exists($_SERVER['DOCUMENT_ROOT'].'/images/users/avatars/'.$usr_imageurl)){
                if ($small=='small'){
                    return '<img border="0" class="usr_img_small" width="64px" height="64px" src="/images/users/avatars/small/'.$usr_imageurl.'" />';
                } else {
                    return '<img border="0" class="usr_img'.$custom_cls.'" width="'.$width.'" height="'.$height.'" src="/images/users/avatars/'.$usr_imageurl.'" />';
                }
                } else {
                if ($small=='small'){ return '<img border="0" class="usr_img_small" width="64px" height="64px" src="/images/users/avatars/small/nopic.jpg" />';
                } else { return '<img border="0" class="usr_img'.$custom_cls.'" width="'.$width.'" height="'.$height.'" src="/images/users/avatars/nopic.jpg" />'; }
            }
        }
    } else {
            if ($small=='small'){ return '<img border="0" class="usr_img_small" width="64px" height="64px" src="/images/users/avatars/small/nopic.jpg" />';
            } else { return '<img border="0" class="usr_img'.$custom_cls.'" width="'.$width.'" height="'.$height.'" src="/images/users/avatars/nopic.jpg" />'; }
    }
}