PHP + MYSQL + Bash <3

#!/bin/bash

# Written by Paulo @ http://github.com/raggesilver
# To compile: shc -f file_name.sh -o output_name

YELLOW='\033[1;33m'
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m'

showLogo() {
    clear
    figlet -c PimScript
    sleep 3
    clear
}

getParams() {
    while [ "$1" != "" ]; do
        case $1 in

            -t | --target ) shift
                            echo -e "${YELLOW}Warning ping target manually overwritten to: \"$1\"${NC}"
                            target=$1
                            ;;

            *)  echo "Unknown option $1."
                exit -1

        esac
        shift
    done
}

checkInternetConnection() {
    wget -q --tries=5 --timeout=20 --spider "$target"
    if [[ ! $? -eq 0 ]]; then
        echo -e "${RED}This script requires internet connection!${NC}"
        exit 1
    fi
}

checkDependencies() {
    status=`dpkg -s figlet`
    if [[ ! "$status" == *"Status: install ok installed"* ]]; then
        zenity --warning --title "Dependencies" --text "PimSript Login depends on figlet to work. Please install it."
        sudo -K
        # PASSWD="$(zenity --password --title=Authentication --text='Install figlet')\n"
        gksu "apt-get install -y figlet"
        if [[ ! $? -eq 0 ]]; then exit 1; fi
    fi
}

printCenter() {
    COLUMNS=$(tput cols)
    while [ "$1" != "" ]; do
        text=$1
        printf "%*s\n" $(((${#text}+$COLUMNS)/2)) "$text"
        shift
    done
}

register() {
    clear
    printCenter "*~.REGISTER.~*"
    echo -n "Username> "
    read username
    echo -n "Password> "
    read -s password
    echo ""
    echo -n "Confirm password> "
    read -s confpassword
    if [[ "$password" != "$confpassword" ]]; then echo -e "\n${RED}Passwords don't match.${NC}"; sleep 3; register; return; fi
    echo ""
    password=`echo $password | md5sum | awk '{print $1}'`
    echo `curl "localhost/shell_app/register.php?username=$username&password=$password" -s`
    doLogin
}

doLogin() {
    if [[ $# -le 0 ]]; then
        clear
        printCenter "*~.LOGIN.~*" "type register as username to register"
    fi
    echo -n "Username> "
    read username
    if [[ "$username" == "register" ]]; then register; return; fi
    echo -n "Password> "
    read -s password
    echo ""
    password=`echo $password | md5sum | awk '{print $1}'`
    response=$(curl "localhost/shell_app/index.php?username=$username&password=$password" -s)
    case $response in

        0) echo -e "${GREEN}Logged in, welcome \e[1m\e[93m\e[5m$username\e[0m!${NC}";;

        1) echo -e "\nPlease fill in all the fields\n"; doLogin "false";;

        2) echo -e "\nIncorrect credentials\n"; doLogin "false";;

        *) echo "Unknown response from server. > $response"

    esac
}

params=$@

target="http://google.com"

getParams $getParams

checkInternetConnection
con=$?

checkDependencies

showLogo

doLogin

exit