Also - check this out, this is how we now use the functions 
. (please, see the “sticky” Functions and function parameters thread in this forum section!)
:global urlEncode do={
:local output ""
:local input [:toarray $1]
:if ([:len $input] > 0) do={
:local input1 [:tostr [:pick $input 0]]
:for i from=0 to=([:len $input1] - 1) do={
:local char [:pick $input1 $i]
:local conversion {" "="%20";"-"="%2D";"("="%28";")"="%29";":"="%3A"}
:foreach old,new in=$conversion do={
:if ($char=$old) do={
:set $char $new;
}
}
:set output ($output . $char)
}
:set output [:tostr $output]
:set output [:toarray $output]
}
:return $output
}
Then you put it in “Functions” script, and - when needed - you do the same in the beginning of your script:
/system script run "Functions"
:global urlEncode
But then, using it is much simpler, for example:
:local original "This is a (simple) string";
:local result [$urlEncode $original];
:put "The original text is:";
:put $original;
:put "And the escaped result is:";
:put $result;
Or even:
:put "This is a quickly escaped string: $[$urlEncode "Escape this: text"] - simple, isn't it?";