for ($channel_data) {
    s@\[@<lftsqbrk/>@g;
    s@\]@<rtsqbrk/>@g;
    s@\(@<lftbrk/>@g;
    s@\)@<rtbrk/>@g;
    s@\+@<plus/>@g;
    s@\?@<ques/>@g;
    s@\&apos;@<apos/>@g;
    s@\$@<dollar/>@g;
}