Tride

urlencode() {
# urlencode <string>

   local length="${#1}"
      for (( i = 0; i < length; i++ )); do
      local c="${1:i:1}"
      case $c in
         [a-zA-Z0-9.~_-]) printf "$c" ;;
         *) printf '%%%02X' "'$c"
      esac
   done
}


# Define main params :

user=<userid>
key=<cléFreeMobile>
# Encode URL for send :
message=$(urlencode "$*")

# Send message
curl -k "https://smsapi.free-mobile.fr/sendmsg?user=$user&pass=$key&msg=$message"