Robustcart.php

Create a complete shoppingcart system with a few lines of code.

Usage

Argument	Description
First	Dictionary array with structure: “form element name value“ => “desired variable name/key used later when retreiving value“ See examples bellow
[
`username_key`	What your $_SESSION[‘thisvalue’] is for your username system, if you have one.
`save_dir`	Folder to save the users shoppingcart
`encrypt`	Encrypt shoppingcart file, if false: users shoppingcart file will be named as the users username
]

$_SESSION[‘cart’] = new Cart($nameToVariable, [Options for saving cart]);

Simply leave options empty if you do not want cart saved in a file!

Examples

<?php include('robustcart.php') ?>
<html>
...
<!-- Optional: Create an iframe and add target="votar" in the form
     to prevent page from refreshing each time the user adds an item to their cart -->
<iframe name="votar" style="display:none;"></iframe>
...
<form method="POST" target="votar">
  <p value="1034" name="articlenumber"> 1034 </p>
  <h1 value="Nuke" name="label"> Nuke </h1>
  <img value="img/uranB12_nuke.jpg" src="img/uranB12_nuke.jpg" name="image">
  <p value="Can be used as a toy or deadly weapon" type="text" name="description"> Can be used as a toy or deadly weapon </p>
  <button type="submit" name="add_to_cart"> Add To Cart </button>
</form>

$values = array(
  "articlenumber" => "articlenmb", 
  "label" => "label",
  "image" => "img",
  "description" => "desc"
);

Example

$_SESSION['cart'] = new Cart($values, ["username_key" => "username", "save_dir" => "users", "encrypt" => TRUE]);

$_SESSION[‘username’] is the username variable
Shoppingcart is stored in session and saved in “users” folder as their encrypted username.json

Example

$_SESSION['cart'] = new Cart($values, []);

Shoppingcart is not saved in file
The customers cart is stored only in session which is the only option if you don’t have accounts.
This is not the worse option, but the customers shopping cart is cleared when session cookie run out

Example

$_SESSION['cart'] = new Cart($values, ["username_key" => "user", "save_dir" => "shoppingcarts", "encrypt" => FALSE);

$_SESSION[‘user’] is the username variable
Shoppingcart is saved in “shoppingcarts” folder as their username.json

Retreiving and removing items

Can be done with a POST request containing a element with name=rfc (Remove-from-cart) and value=cart_index of item to remove

foreach($_SESSION["shopping_cart"] as $keys => $values)
{
  // Echo value of the description element in example form
  echo $values['desc'];
  // Items can be removed only with post
  echo '<form method="POST"> <button type="submit" name="rfc" value="'.$values['cart_index'].'"> Remove </button> </form>';
}

Outputs “Can be used as a toy or deadly weapon” with a remove button