path_contains () {
    needle=$1;
    shift;
    old_ifs=$IFS
    IFS=:
    set -f
    set -- $PATH
    set +f
    IFS=$old_ifs

    for haystack in "$@"; do
        [ "$needle" = "$haystack" ] && return 0; ##success                                               
    done;
    return 1;
}