PHP Tutorials. Application Example 1

Tutorials | Application Example Php/mysql SHOPPING cart Program
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if (! $session &&! $scid) {
$session = MD5 (Uniqid (rand ());
Setcookie ("SCID", "$session", Time () + 14400);
}/* Last number are expiration time in seconds, 14400 sec = 4 hrs * *

Class Cart {
function Check_item ($table, $session, $product) {
$query = "SELECT * from $table WHERE session= ' $session ' and product= ' $product '";
$result = mysql_query ($query);

if (! $result) {
return 0;
}

$numRows = mysql_num_rows ($result);

if ($numRows = = 0) {
return 0;
} else {
$row = Mysql_fetch_object ($result);
return $row->quantity;
}
}

function Add_item ($table, $session, $product, $quantity) {
$qty = $this->check_item ($table, $session, $product);
if ($qty = = 0) {
$query = "INSERT into the $table (session, product, quantity) VALUES";
$query. = "(' $session ', ' $product ', ' $quantity ')";
mysql_query ($query);
} else {
$quantity + + $qty;
$query = "UPDATE $table SET quantity= ' $quantity ' WHERE session= ' $session ' and ';
$query. = "product= ' $product '";
mysql_query ($query);
}
}

function Delete_item ($table, $session, $product) {
$query = "DELETE from $table WHERE session= ' $session ' and product= ' $product '";
mysql_query ($query);
}

function modify_quantity ($table, $session, $product, $quantity) {
$query = "UPDATE $table SET quantity= ' $quantity ' WHERE session= ' $session '";
$query. = "and product= ' $product '";
mysql_query ($query);
}

function Clear_cart ($table, $session) {
$query = "DELETE from $table WHERE session= ' $session '";
mysql_query ($query);
}

function Cart_total ($table, $session) {
$query = "SELECT * from $table WHERE session= ' $session '";
$result = mysql_query ($query);
if (mysql_num_rows ($result) > 0) {
while ($row = Mysql_fetch_object ($result)) {
$query = "Select Price from inventory WHERE product= ' $row->product '";
$invResult = mysql_query ($query);
$row _price = mysql_fetch_object ($invResult);
$total + + ($row _price->price * $row->quantity);
}
}
return $total;
}

function display_contents ($table, $session) {
$count = 0;
$query = "SELECT * from $table WHERE session= ' $session ' ORDER by id";
$result = mysql_query ($query);
while ($row = Mysql_fetch_object ($result)) {
$query = "SELECT * FROM inventory WHERE product= ' $row->product '";
$result _INV = mysql_query ($query);
$row _inventory = mysql_fetch_object ($result _inv);
$contents ["Product"] [$count] = $row _inventory->product;
$contents ["Price"] [$count] = $row _inventory->price;
$contents ["Quantity"] [$count] = $row->quantity;
$contents ["Total"] [$count] = ($row _inventory->price * $row->quantity);
$contents ["description"] [$count] = $row _inventory->description;
$count + +;
}
$total = $this->cart_total ($table, $session);
$contents ["final"] = $total;
return $contents;
}

function Num_items ($table, $session) {
$query = "SELECT * from $table WHERE session= ' $session '";
$result = mysql_query ($query);
$num _rows = mysql_num_rows ($result);
return $num _rows;
}

function Quant_items ($table, $session) {
$quant = 0;
$query = "SELECT * from $table WHERE session= ' $session '";
$result = mysql_query ($query);
while ($row = Mysql_fetch_object ($result)) {
$quant + + $row->quantity;
}
return $quant;
}
}
?>

/*
This section contains a description of how to create the tables on your MySQL server.

# MySQL Dump 6.0
#
# Host:localhost Database:kmartshopper
#--------------------------------------------------------
# Server Version 3.22.25

#
# Table structure for table ' inventory '
#
CREATE TABLE Inventory (
Product Tinytext not NULL,
Quantity Tinytext not NULL,
ID int (4) DEFAULT ' 0 ' not NULL auto_increment,
Description Tinytext not NULL,
Price float (10,2) DEFAULT ' 0.00 ' is not NULL,
Category char (1) DEFAULT ' not NULL,
KEY ID (ID),
PRIMARY KEY (ID),
KEY Price
);

#
# Table structure for table ' shopping '
#
CREATE TABLE Shopping (
Session Tinytext not NULL,
Product Tinytext not NULL,
Quantity Tinytext not NULL,
Card Tinytext not NULL,
ID int (4) DEFAULT ' 0 ' not NULL auto_increment,
KEY ID (ID),
PRIMARY KEY (ID)
);
*/

Example
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Include ("shoppingcart.php");
$cart = new Cart;
$mysql _link = mysql_connect ("localhost", "Wwwrun", "");
$mysql _select_db ("Kmartshopper", $mysql _link)/* Heh, use whatever database name to put the 2 tables under in place of km Artshopper *
?>
/* Call functions like $cart->add_item and such, the Code. */