Asm 05 Instructions

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CS4028 Assignment 05 – PHP

Goetz Botterweck, Lero, University of Limerick

1 Invoice Form

1.1 Overview

In this assignment your objective is to create a web

form and corresponding action (both in PHP) which

can be used to generate simple invoices sent out

by the fictitious Limerick Laptop, Ltd.

 form.php – Web form where an

employee can enter the details of a sale,

i.e., which laptop model was sold with

what options.

 form-action.php – PHP Script called

from form.php as a form action (action

attribute of <form>) when the submit

button is pressed. Generates an invoice

(including price calculations).

This main functionality is augmented with a very

simple settings page that allows to set the

preferred currency.

 settings.php – Minimal form to pick a

currency from EUR, GBP, or SEK.

 settings-action.php – Form action

called from settings.php (action attribute

of <form>). Saves the chosen value in the

PHP session variable

_SESSION["currency"].

1.2 form.php

 The form should provide fields for the

following data:

o Name

o Address (text area, 2 lines á 50

characters)

o City

o Country (dropdown), can be

Ireland, UK, Sweden

o (ZIP codes are not supported)

o Choose one model out of: X13,

X15, P5000

o Choose one OS out of: Win10,

Ubuntu

o Optional features (can choose

none, one, or both): Touch Display,

SSD

1.3 form-action.php

 Rules for price calculation

X13

base price 1300 EUR

X15

base price 1500 EUR

P5000

base price 1800 EUR

Win10

0 EUR, i.e., included in

the base price

Ubuntu

- 180 EUR (reduction)

Touch Display

+ 250 EUR

Upgrade to SSD

+ 300 EUR

 The output of form-action.php should

look somewhat like this:

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 The sender address of Limerick Laptops is

fixed.

 The address under "Bill To" is composed

from the input in the first input fields.

o Note that you might have to

convert carriage returns entered in

the textarea (using the [Enter] key)

into line breaks.

 The "Options" lines only show up if the

particular options were actually chosen.

 Total shows the total price calculated from

the sum of all chosen options.

1.4 Session variable

 Introduce session handling by extending

every PHP script with a few lines.

 The session variable

_SESSION["currency"] will have the

value EUR, GBP, or SEK.

 Default is EUR.

1.5 settings.php

 This form will allow to pick one of EUR,

GBP, or SEK from a list of radio buttons.

 It should look somewhat like this:

1.6 settings-action.php

 This script is called from settings.php as a

form action.

 It stores the chosen currency value in the

session variable _SESSION["currency"]

and gives some feedback message that it

has done so. It will then provide a link to

jump back to form.php.

 The output should look somewhzat like

this:

 Note that navigating to settings.php,

then to settings-action.php, and

finally back to form.php will cause the loss

of data entered into the invoice form so

far, unless additional measures are taken

(e.g., saving the data in session variables).

We ignore that for this simplified example.

1.7 Augment form.php to include

currency

 Expand form.php to show the currently

set currency in the footer.

 The footer of form.php should also

provide a link to jump to settings.php.

 That should look somewhat like this (see

footer at the bottom of the page):

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1.8 Augment form-action.php

 If the currency is set to a value different

from EUR, use the following conversion

factors to calculate a converted total.

o 1 EUR = 0.89 GBP

o 1 EUR = 9.83 SEK

 Use round() to round the converted

total.

 Show the converted total in an additional

column after the EUR total.

 If currency is EUR, then omit the additional

column.

 For instance, for currency SEK and the

input in the previous screenshot, the

output should look somewhat like this:

1.9 Other Notes

 You should handle the case that initially no

currency is defined.

Besides that, to simplify things, we make the

following assumptions:

 No input validation (checking for required

fields etc.)

 No sanitization of input (e.g., escaping

special characters)

 We assume form-action.php just generates

a document without changing data. Hence,

it is appropriate to use GET as a HTTP

method. This avoids annoying confirmation

dialogs by the web browser during testing

("Do you really want to resubmit the same

data?").