Php shopping cart implementation
This article mainly introduces the php shopping cart implementation method. The shopping cart function is implemented using four files and the txt file is used to save the content of the shopping cart, which is simple and practical. For more information, see
This article describes how to implement the php shopping cart. Share it with you for your reference. The specific analysis is as follows:
Here we provide you with a simple php shopping cart code, from adding shopping products and purchasing, in the mall development, this function is indispensable, we do not need a database, A txt file is used to operate the user's shopping content.
Add the product to the shopping cart. The Code is as follows:
The Code is as follows:
<? Php
//
// Add_item.php:
// Add an item to the shopping cart.
//
Session_start ();
If (session_is_registered ('cart ')){
Session_register ('cart ');
}
Require 'lib. inc. php'; // LoadProducts ()
LoadProducts (); // Load products in $ master_products_list
// Make $ curr_product global
$ Curr_product = array ();
// Loop through all the products and pull up the product
// That we are interested in
Foreach ($ master_products_list as $ prod_id => $ product ){
If (trim ($ prod_id) = trim ($ _ GET [id]) {
$ Curr_product = $ product;
}
}
// Register our session
// Session_register ('cart ');
// If (session_is_registered ('cart') echo "registered ";
If ($ _ POST [ordered]) {// If they have chosen the product
Array_push ($ _ SESSION [cart] [products], array (trim ($ _ POST [id]), $ _ POST [quantity]);
$ _ SESSION [cart] [num_items] + =$ _ POST [quantity];
}
?>
<Html>
<Head>
<Title>
<? Php if ($ _ POST [ordered]) {?>
Added <? Php echo $ curr_product [name];?> To your shopping basket
<? Php} else {?>
Add <? Php echo $ curr_product [name];?> To your shopping basket
<? Php }?>
</Title>
</Head>
<Body>
<? Php if ($ _ POST [ordered]) {?>
<H1> <? Php echo $ curr_product [name];?>
Successfully added to the shopping basket
<A href = "cart. php"> return to the </a> item list page.
<? Php} else {?>
<H1> Add <? Php echo $ curr_product [name];?> To your shopping basket
<Form action = "<? Php echo $ PHP_SELF;?> "Method =" post ">
Product Name: <? Php echo $ curr_product [name];?>
<Br>
Product Description: <? Php echo $ curr_product [desc];?>
<Br>
Unit Price: RMB <? Php echo $ curr_product [price];?>
<Br>
Item quantity: <input type = "text" size = "7" name = "quantity">
<Input type = "hidden" name = "id" value = "<? Php echo $ _ GET [id];?> ">
<Input type = "hidden" name = "ordered" value = "1">
<Input type = "submit" value = "add to shopping bar">
</Form>
<? Php }?>
</Body>
</Html>
View the items in the shopping cart. The Code is as follows:
The Code is as follows:
<? Php
//
// Cart. php:
//
Session_start ();
Require 'lib. inc. php ';
// Determine whether cart is registered as the shopping basket session variable. If cart is not registered, the cart variable is registered.
If (session_is_registered ('cart ')){
Session_register ('cart ');
}
// If the shopping basket is not initialized, the shopping basket is initialized.
If (! Isset ($ _ SESSION [cart] [num_items]) {
$ _ SESSION [cart] = array ("num_items" => 0,
"Products" => array ());
}
// From site_lib.inc, Loads the $ master_products_list array
LoadProducts (); // load the item list
?>
<Html>
<Head>
<Title> Demonstrate the Shopping Basket Program for session tracking </title>
</Head>
<Body>
<H1> welcome to the online store
<? Php
If ($ _ SESSION [cart] [num_items]) {// If there is something to show
?>
<H2> items in the current shopping basket <Br>
<Table border = "2" cellpadding = "5" cellspacing = "2">
<Tr>
<Th>
Product Name
</Th>
<Th>
Product Description
</Th>
<Th>
Unit Price
</Th>
<Th>
Quantity
</Th>
<Th>
</Th>
</Tr>
<? Php
// Loop through the products
Foreach ($ _ SESSION [cart] [products] as $ I =>$ product ){
$ Product_id = $ product [0];
$ Quantity = $ product [1];
$ Total + = $ quantity *
(Double) $ master_products_list [$ product_id] [price];
?>
<Tr>
<Td>
<? Php echo $ master_products_list [$ product_id] [name];?>
</Td>
<Td>
<? Php echo $ master_products_list [$ product_id] [desc];?>
</Td>
<Td>
<? Php echo $ master_products_list [$ product_id] [price];?>
</Td>
<Td>
<Form action = "change_quant.php" method = "post">
<Input type = "hidden" name = "id" value = "<? Php echo $ I;?> ">
<Input type = "text" size = "3" name = "quantity"
Value = "<? Php echo $ quantity;?> ">
</Td>
<Td>
<Input type = "submit" value = "Quantity Change">
</Form>
</Td>
</Tr>
<? Php
}
?>
<Tr>
<Td colspan = "2" ALIGN = "right">
<B> total: </B>
</Td>
<Td colspan = "2">
RMB: <? Php echo $ total;?>
</Td>
<Td> </td>
</Tr>
</Table>
<Br>
<Br>
<? Php
}
?>
<H2> items to be sold in the store <Br>
<I>
We provide the following products for sale:
</I>
<Br>
<Table border = "2" cellpadding = "5" cellspacing = "2">
<Tr>
<Th>
Product Name
</Th>
<Th>
Product Description
</Th>
<Th>
Unit Price
</Th>
<Th>
</Th>
</Tr>
<? Php
// Show all of the products
Foreach ($ master_products_list as $ product_id => $ item ){
?>
<Tr>
<Td>
<? Php echo $ item [name];?>
</Td>
<Td>
<? Php echo $ item [desc];?>
</Td>
<Td>
$ <? Php echo $ item [price];?>
</Td>
<Td>
<A href = "add_item.php? Id = <? Php echo $ product_id;?> ">
Add to shopping basket
</A>
</Td>
</Tr>
<? Php
}
?>
</Table>
Modify the number of cart in the following code:
The Code is as follows:
<? Php
//
// Change_quant.php:
// Change the quantity of an item in the shopping cart.
//
Session_start ();
If (session_is_registered ('cart ')){
Session_register ('cart ');
}
// Typecast to int, making sure we access
// Right element below
$ I = (int) $ _ POST [id];
// Save the old number of products for display
// And arithmetic
$ Old_num = $ _ SESSION [cart] [products] [$ I] [1];
If ($ _ POST [quantity]) {
$ _ SESSION [cart] [products] [$ I] [1] =$ _ POST [quantity]; // change the quantity
} Else {
Unset ($ _ SESSION [cart] [products] [$ I]); // Send the product into oblivion
}
// Update the number of items
$ _ SESSION [cart] [num_items] = ($ old_num >$ _ POST [quantity])?
$ _ SESSION [cart] [num_items]-($ old_num-$ _ POST [quantity]):
$ _ SESSION [cart] [num_items] + ($ _ POST [quantity]-$ old_num );
?>
<Html>
<Head>
<Title>
Quantity Modification
</Title>
</Head>
<Body>
<H1> count: <? Php echo $ old_num;?> Change
<? Php echo $ _ POST [quantity];?> </H1>
<A href = "cart. php"> return to the </a> item list page.
</Body>
</Html>
Function page, the user saves the content in the shopping cart to the txt database, the Code is as follows:
The Code is as follows:
<? Php
// Item Array
$ Master_products_list = array ();
// Function for loading item data
Function LoadProducts (){
Global $ master_products_list;
$ Filename = 'products.txt ';
$ Fp = @ fopen ($ filename, "r ")
Or die ("opening the $ filename file failed ");
@ Flock ($ fp, 1)
Or die ("failed to lock the $ filename file ");
// Read the file content
While ($ line = fgets ($ fp, 1024 )){
List ($ id, $ name, $ desc, $ price) = explode ('|', $ line); // read data in each row, and use |
$ Id = trim ($ id); // remove the first and last special characters
$ Master_products_list [$ id] = array ("name" => $ name, // name
"Desc" => $ desc, // description
"Price" => $ price); // unit price
}
@ Fclose ($ fp) // close the file
Or die ("failed to close the $ filename file ");
}
?>
It is very simple. We only use four files to implement the shopping cart function with php. Well, this is just a simple php shopping cart code that needs to be considered more complicated and better.
I hope this article will help you with php programming.
