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INTRODUCTION
|
Step 0
Download & Overview |
Step 1
The Database |
Step 2
System Scripts |
Step 3
Products Scripts |
Step 4
Cart Scripts |
Extra
Useful Bits & Links |
Closing
What Next? |
STEP 0
DOWNLOAD & OVERVIEW
Firstly, here is the download link to the source code as promised, and stuff to take note of.
SOURCE CODE DOWNLOAD
Click here to download all the source code in a zip file – I have released it under the MIT License, so feel free to build on top of it if you want to.
FOLDERS
Here is a quick introduction to how the folders are being organized inside the zip file.
images
Where we store all the product images.lib
Where we store all the PHP library files and configuration.public
Where we put all the CSS, Javascript, and client-side scripts.SQL
All the necessary SQL to build the database are put in here, please remember to delete this folder after you have imported all of them.
QUICK START
- Unzip the downloaded file into a folder.
- Create your shop database, and import all the files in the
SQL
folder. Feel free to delete this folder afterward. - Change the database settings in
lib/2a-config.php
. - Launch
3b-products.php
in your browser.
404 ERRORS WITH AJAX CART ACTIONS?
Make sure that the server path is set correctly in all the AJAX calls in
public/4a-cart.js
. Do a quick search-and-replace for url : '4b-ajax-cart.php'
, try using the absolute URL instead. For example, url : 'http://mysite.com/cart/4b-ajax-cart.php'
.
SEND ORDER VIA EMAIL
Need to send out a confirmation email to the customer? There are 2 different versions of checkout, simply change
req : 'checkout'
to req : 'checkout-email'
in public/4a-cart.js
. You might want to customize the email message in 4b-ajax-cart.php
though, it is nothing but a skeleton email with all the products.
EXTRA TUTORIALS
Sorry to all the absolute beginners – Things are getting a little out of hand here with questions such as “what is AJAX”, “how to insert SQL”, and “how to add database fields”. Answering all of those will literally turn this guide into a “how to basics”, which is not the original intention. Adobe serial number generator. So I will leave some links to other guides here instead.
STEP 1
THE DATABASE
Let us start by establishing the foundations of the system – The database. Not to worry, there are only 3 simple tables involved in this project.
TABLES OVERVIEW
Table | Description |
products | Holds the products that you have for sale. |
orders | Captures the customer’s name and email address. |
orders_items | The items of each order. |
PRODUCTS TABLE
Field | Description |
product_id | The product ID. Primary key, auto increment. |
product_name | Name of the product. Indexed field, so that future searches for products by name becomes more efficient. |
product_image | The image of the product, optional. |
product_description | The description of the product, optional. |
product_price | The price of the product. This is set to be followed up by a maximum of 2 decimal places, for example, 123.45 – Please change this field if the currency that you are working with is different. |
ORDERS TABLES
Free Php Project Source Code
SQL/1b-orders.sql
Field | Description |
order_id | The order ID, primary key. Set to auto increment as well. |
order_date | The order date. Default to the current timestamp. |
order_name | The customer’s name, set as an index for easy searching. |
order_email | The customer’s email address, indexed as well. |
ORDER ITEMS TABLES
Field | Description |
order_id | The order ID. Partial primary key and foreign key. |
product_id | The product ID. Partial primary key and foreign key. |
quantity | The number of products ordered. |
DUMMY PRODUCTS AND IMAGES
SQL/1d-dummy-products.sql
As for this final one, it contains some dummy products, and you can totally choose to not import them; You can create some of your own actual products instead. I have also placed all the dummy product images in the
/images
folder, so feel free to delete those if you are not using it.
STEP 2
SYSTEM SCRIPTS
Now that we have established the database foundations, let us move on to build the server-side PHP foundations – The config and database library file.
CONFIG FILE
This one should be very straightforward, just a script to hold all our settings. Just remember to change the database settings to your own. Also, take note that I have silenced the notification messages in
error_reporting
. They are non-critical “errors” that will not break the code, but serve very well in scaring away beginners and users… So just keep it muted for the sake of world peace.
THE DATABASE LIBRARY
lib/2b-lib-db.php
This is just a nifty PDO database library that I have used all over my other projects. Please feel free to use this to build your future projects, if you want. Download dropbox app for mac pro.
Function | Description |
__construct | The constructor, automatically connects to the database when the object is being created. |
__destructor | The destructor, automatically disconnects from the database when the object is being destroyed. |
start | Auto-commit off. Used for multiple queries, and in conjunction with end. |
end | To commit or rollback the queries. Used for multiple queries, and in conjunction with start. |
exec | Runs an insert, replace, update, and delete SQL queries. |
fetch | Runs a select SQL query. |
STEP 3
PRODUCTS SCRIPTS
Now that we have established all the necessary groundworks, let us create a products library and a page to showcase them.
THE PRODUCTS LIBRARY
Keepvid for mac. With the power of the database library – All we need is nothing more than a couple of SQL queries to create this products library.
Function | Description |
get | Get all the products. |
add | Add a new product. |
edit | Update an existing product. |
del | Delete an existing product. |
THE PRODUCTS PAGE
3b-products.php
- We load the library files at the top, use it to fetch the products from the database.
- A cart button in the
<header>
section to show the total number of items, and to toggle between the shopping cart/products when clicked. - Products display in the middle.
- Finally, a hidden cart
<div>
element at the bottom, which we will use to load the shopping cart via AJAX.
Please do feel free to change the structure of this page as you see fit.
THE CSS
Holy cow! That is a lot of CSS code, but keep calm and analyze – There are only 4 sections.
- The overall and shopping cart icon at the top.
- Followed by styles for the products list.
- The shopping cart.
- Finally, the checkout form.
That’s it. Feel free to change the styles to fit your own website’s theme.
STEP 4
CART SCRIPTS
For this final step, we shall deal with the scripts of the shopping cart itself.
SHOPPING CART JAVASCRIPT
Yep, this Javascript will pretty much do most of the shopping cart magic on the HTML page. It may seem pretty complicated, but it is actually nothing more than a bunch of AJAX calls to the server.
Function | Description |
cart.ajax | Helper function, does an AJAX call. |
cart.add | Add an item to the cart. |
cart.count | Update the total number of items in the cart. |
cart.toggle | Show/hide the shopping cart contents. |
cart.change | Change the quantity of an item in the cart. |
cart.remove | Remove an item from the cart. |
cart.checkout | Check out the current order. |
AJAX HANDLER
4b-ajax-cart.php
On the receiving end of the AJAX calls, is a PHP script that will do the processing. How this handler work is pretty easy – All we have to do is to post the service request
$_POST['req']
, followed by the required parameters.
Req | Description |
count | Get the total number of items in the cart. |
add |
Add a new item to the cart.
Parameters: product_id
|
show | Show the current shopping cart. |
change |
Change the quantity of an item in the cart. A quantity of 0 will remove the product from the cart.
Parameters: product_id, qty
|
checkout |
Check out the current cart.
Parameters: name, email
|
checkout-email |
An alternative checkout that will send out an email to the customer.
Parameters: name, email
|
![Free php source code download Free php source code download](/uploads/1/2/6/5/126532241/250452822.png)
SHOPPING CART SESSION
Apart from the POST parameters, another important thing that you need to know is how the shopping cart is being kept in the user session.
- All the selected items and quantity are kept in
$_SESSION['cart']
. - It is actually nothing but a simple array that goes
PRODUCT ID => QUANTITY
. - So for example, if we have quantity 12 of product id 8 in the cart, that will result in
$_SESSION['cart'][8] = 12
.
THE CART LIBRARY
Function | Description |
details | Get all the products in the cart. |
checkout | Create a new order. |
get | Get a specified order. |
THANK YOU PAGE
4d-thank-you.php
Finally, a simple thank you page for the users after they check out, and that’s the end of the project!
EXTRA
USEFUL BITS & LINKS
That’s all for this project, and here is a small section on some extras that may be useful to you.
ADDING MORE FIELDS
Need to capture more fields such as the user ID, address or telephone number from the user? Add more description fields to the products? Well, there are 3 parts to the system, and you just need to modify them accordingly:
- Database – Add your required fields to the tables accordingly.
- Server-side scripts – Update the respective AJAX handler
4b-ajax-cart.php
and PHP librarieslib/3a-lib-products.php
lib/4c-lib-cart.php
to properly capture the additional fields. - Client-side scripts – Update the product page
3b-products.php
, and the Javascriptpublic/4a-cart.js
to include your new fields accordingly.
FUTURE EXPANSIONS
This tutorial has barely covered a small part of a possibly massive system. It is still missing a user system, an administrator’s panel, and so much more. Here are a few links to my other guides that may be useful:
- Import/export CSV, if you need to do reports.
- Looking to add online payment methods? Paypal, Stripe.
Free Php Source Code Encryption Software
FULL-FLEDGED SHOPPING CARTS
Changed your mind? Don’t want to do so much coding? Try:
- WordPress and Woocommerce
A BETTER SHOPPING CART
Need a shopping cart with product options? Product categories? Discount coupons? User system and admin panel? Click here to check out my eBook! Go ahead, take a sneak peek inside – Click here to download the first 4 chapters.
WHERE TO GET HELP?
Php Source Code Examples
This blog is run by a “one-man army” – Yours truly. I have several other blogs to look after, plus a life to live outside blogging as well. I still try to answer some questions, but if you need answers urgently, please do check out my list of websites to get help from.
CLOSING
WHAT NEXT?
Free Php Source Code For Website
Congratulations, you have completed a long and tiring tutorial. But this is still a very rough shopping cart, and there are plenty of improvements to be made – The visuals of the pages, a proper checkout and thank you page, an administrator’s panel, restricting the number of items that can be ordered, error handling, no response from AJAX call, SQL error, etc…
Free Php Source Code And Its Databases
But for now, rest easy knowing that you are able of creating fully functional shopping carts. If you want to add anything to the guide, please feel free to comment below. Good luck with your future projects and happy coding!
W.S. Toh is a senior web developer and software engineer with over 10 years of experience in building websites, systems, and applications. He is also a tech-gadget lover, secretly an evil code ninja.
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