fancy ciscolab entry

<?php
//GLOBAL

global $RUNNING, $USER_IN_SESSION, $username, $password;
$RUNNING = true;
$USER_IN_SESSION = false;
$username = null;
$password = null;

function art(){
    echo "

      :::::::: ::::::::::: ::::::::   ::::::::   ::::::::          :::            :::     :::::::::
    :+:    :+:    :+:    :+:    :+: :+:    :+: :+:    :+:         :+:          :+: :+:   :+:    :+:
   +:+           +:+    +:+        +:+        +:+    +:+         +:+         +:+   +:+  +:+    +:+
  +#+           +#+    +#++:++#++ +#+        +#+    +:+         +#+        +#++:++#++: +#++:++#+
 +#+           +#+           +#+ +#+        +#+    +#+         +#+        +#+     +#+ +#+    +#+
#+#    #+#    #+#    #+#    #+# #+#    #+# #+#    #+#         #+#        #+#     #+# #+#    #+#
######## ########### ########   ########   ########          ########## ###     ### #########

Commands:

/login      /logout     /checkloginstatus       /exit\n\n
";
}
function splash() {
    echo "
                                .:xxxxxxxx:.
                             .xxxxxxxxxxxxxxxx.
                            :xxxxxxxxxxxxxxxxxxx:.
                           .xxxxxxxxxxxxxxxxxxxxxxx:
                          :xxxxxxxxxxxxxxxxxxxxxxxxx:
                          xxxxxxxxxxxxxxxxxxxxxxxxxxX:
                          xxx:::xxxxxxxx::::xxxxxxxxx:
                         .xx:   ::xxxxx:     :xxxxxxxx
                         :xx  x.  xxxx:  xx.  xxxxxxxx
                         :xx xxx  xxxx: xxxx  :xxxxxxx
                         'xx 'xx  xxxx:. xx'  xxxxxxxx
                          xx ::::::xx:::::.   xxxxxxxx
                          xx:::::.::::.:::::::xxxxxxxx
                          :x'::::'::::':::::':xxxxxxxxx.
                          :xx.::::::::::::'   xxxxxxxxxx
                          :xx: '::::::::'     :xxxxxxxxxx.
                         .xx     '::::'        'xxxxxxxxxx.
                       .xxxx                     'xxxxxxxxx.
                     .xxxx                         'xxxxxxxxx.
                   .xxxxx:                          xxxxxxxxxx.
                  .xxxxx:'                          xxxxxxxxxxx.
                 .xxxxxx:::.           .       ..:::_xxxxxxxxxxx:.
                .xxxxxxx''      ':::''            ''::xxxxxxxxxxxx.
                xxxxxx            :                  '::xxxxxxxxxxxx
               :xxxx:'            :                    'xxxxxxxxxxxx:
              .xxxxx              :                     ::xxxxxxxxxxxx
              xxxx:'                                    ::xxxxxxxxxxxx
              xxxx               .                      ::xxxxxxxxxxxx.
          .:xxxxxx               :                      ::xxxxxxxxxxxx::
          xxxxxxxx               :                      ::xxxxxxxxxxxxx:
          xxxxxxxx               :                      ::xxxxxxxxxxxxx:
          ':xxxxxx               '                      ::xxxxxxxxxxxx:'
            .:. xx:.                                   .:xxxxxxxxxxxxx'
          ::::::.'xx:.            :                  .:: xxxxxxxxxxx':
  .:::::::::::::::.'xxxx.                            ::::'xxxxxxxx':::.
  ::::::::::::::::::.'xxxxx                          :::::.'.xx.'::::::.
  ::::::::::::::::::::.'xxxx:.                       :::::::.'':::::::::
  ':::::::::::::::::::::.'xx:'                     .'::::::::::::::::::::..
    :::::::::::::::::::::.'xx                    .:: :::::::::::::::::::::::
  .:::::::::::::::::::::::. xx               .::xxxx :::::::::::::::::::::::
  :::::::::::::::::::::::::.'xxx..        .::xxxxxxx ::::::::::::::::::::'
  '::::::::::::::::::::::::: xxxxxxxxxxxxxxxxxxxxxxx :::::::::::::::::'
    '::::::::::::::::::::::: xxxxxxxxxxxxxxxxxxxxxxx :::::::::::::::'
        ':::::::::::::::::::_xxxxxx::'''::xxxxxxxxxx '::::::::::::'
             '':.::::::::::'                        `._'::::::''


    \n";
}
art();
$users = array("user1" => "1234", "user2" => "5678", "user3" => "abcd", "user4" => "efgh",
                "user5" => "ijkl", "user6" => "mnop", "ZunderPacis" => "broCode", "JoeBiden" => "freePalestine");
function login($username, $password, $users){
    global $USER_IN_SESSION;
    if (array_key_exists($username, $users)) {
        if ($password == $users[$username]) {
            echo "Login successful.\n";
            $USER_IN_SESSION = true;
        }
        else {
            echo "Incorrect password.\n";
        }
        //echo "Username exists in \$users.\n";
    } else {
        echo "Username does not exist in \$users.\n";
    }
}
function logout() {
    global $USER_IN_SESSION, $username, $password;
        if ($USER_IN_SESSION == true) {
            $username = NULL;
            $password = NULL;
            $USER_IN_SESSION = false;
        }
        else {
            echo "Already logged out!\n";
        }
}
function isLoggedIn($username){
    global $USER_IN_SESSION;
    if ($USER_IN_SESSION == true) {
        echo "{$username} is currently logged in.\n";
    }
    else {
        echo "No one is currently logged in.\n";
    }
}
while($RUNNING == true) {
  global $USER_IN_SESSION;
  if ($USER_IN_SESSION != true) {
     fwrite(STDOUT, "[~cisco-lab]$ ");
        $user_input = readline();
  }
  else {
      fwrite(STDOUT, "{$username}@cisco-lab:~$ ");
        $user_input = readline();
  }

  //user actions
  switch ($user_input) {
    case "/exit":
        $RUNNING = false;
        break;
    case "/login":
        global $USER_IN_SESSION;
        if ($USER_IN_SESSION == false) {
            echo "Enter Username: ";
            $username = readline();
            echo "Enter Password: ";
            $password = readline();

            login($username, $password, $users);
        }
        elseif ($USER_IN_SESSION == true) {
            echo "Already logged in as '{$username}'.\n";
        }
        break;
    case "/logout":
        global $USER_IN_SESSION;
        if ($USER_IN_SESSION == true) {
            echo "{$username} logged out.\n";
        }
        logout();
        break;
    case "/checkloginstatus":
        global $USER_IN_SESSION;
        if ($USER_IN_SESSION == true) {
            isLoggedIn($username);
        }
        else {
            echo "No user is currently logged in.\n";
        }
        break;
    case "/help":
        echo "___________________________________________________\n\n/login\t\t\tLogin\n/logout\t\t\tTo logout\n/checkloginstatus\tTo check login status\n/exit\t\t\tTo exit\n___________________________________________________\n\n";
        break;
    //debug
    case "/info":
        global $username, $password;
        echo "\n\$user: {$username}\n";
        echo "\$password: {$password}\n";
        echo $USER_IN_SESSION ? '$USER_IN_SESSION: true' : '$USER_IN_SESSION: false';
        echo "\n\n";
        break;
    case "/splash":
        splash();
    default:
        //echo "'{$user_input}' is not recognized as an internal or external command, For more information on a specific command, type /help.\n";
  }
}
?>