class ShoppingCart {
function ShoppingCart ( $populate='session' ) {
// it can populate itself from a session or a request
$this->count = 0;
$this->items = array();
if ( $populate == 'session' ) $this->restore();
elseif ( $populate == 'request' ) $this->populate_from_request();
}
function add_item( $array, $qty = 1 ) {
$this->count = $this->count + $qty;
$this->items[ $this->count ] = new cart_item( $array );
}
function save() {
$array =& $_SESSION[ 'cart' ];
$count = 0;
foreach ( $this->items as $item ) {
$count = $count + 1;
$array[ $count ] =& $item->info;
}
}
function restore() {
if ( ! isSet( $_SESSION[ 'cart' ] ) or ! $_SESSION[ 'cart' ] ) return;
$array =& $_SESSION[ 'cart' ];
foreach ( $array as $store ) {
$this->add_item( $store );
}
}
function populate_from_request() {
if ( ! $_REQUEST[ 'prod' ] ) return;
$proto = new cart_item();
foreach ( $_REQUEST[ 'proud' ] as $index => $value ) {
if ( $_REQUEST[ 'quantity' ][ $index ] ) {
$store = array();
foreach ( $proto->fields as $field ) {
$store[ $field ] = $_REQUEST[ $field ][ $index ];
}
$this->add_item( $store );
}
}
}
function show_cart() {
$count = 0;
foreach ( $this->items as $item ) {
$item->display_line_item( sprintf( '[%02s]', $count ) );
$count++;
}
}
function total() {
$sum = 0;
foreach ( $this->items as $item ) {
$sum += $item->total();
}
return sprintf( "%.2f", $sum );
}
function print_html() {
// do your display as customer html
}
}class cart_item extends {
var $fields = array( 'pname',
'number',
'quantity',
'pricing' );
function cart_item( $store=false,
$product=false ) {
$this->info = array();
$this->product = $product;
if ( $store ) {
$this->info[ 'pname' ] = $store[ 'pname' ];
$this->info[ 'number' ] = $store[ 'number' ];
$this->info[ 'quantity' ] = $store[ 'quantity' ];
$this->info[ 'pricing' ] = $store[ 'pricing' ];
}
}
function total() {
return sprintf( "%.2f", $this->info[ 'quantity' ] * $this->info[ 'pricing' ] + $this->info[ 'setupcost' ] );
}
function display_line_item( $suffix=' )
{
// print some crap
}
}