PHP之购物车

该文章记录了购物车的实现代码，仅供参考

book_sc_fns.php

output_fns.php

  
  
    
    
  
  
  

  
  

  


  

No categories currently available
";
     return;
  }
  echo "
";
  foreach ($cat_array as $row)  {
    $url = "show_cat.php?catid=".$row['catid'];
    $title = $row['catname'];
    echo "
";
    do_html_url($url, $title);
    echo "
";
  }
  echo "
";
  echo "
";
}

function display_books($book_array) {
  //display all books in the array passed in
  if (!is_array($book_array)) {
    echo "
No books currently available in this category
";
  } else {
    //create table
    echo "";

    //create a table row for each book
    foreach ($book_array as $row) {
      $url = "show_book.php?isbn=".$row['isbn'];
      echo "";
    }

    echo "
";
      if (@file_exists("images/".$row['isbn'].".jpg")) {
        $title = "";
        do_html_url($url, $title);
      } else {
        echo " ";
      }
      echo "
";
      $title = $row['title']." by ".$row['author'];
      do_html_url($url, $title);
      echo "
";
  }

  echo "
";
}

function display_book_details($book) {
  // display all details about this book
  if (is_array($book)) {
    echo "";
    //display the picture if there is one
    if (@file_exists("images/".$book['isbn'].".jpg"))  {
      $size = GetImageSize("images/".$book['isbn'].".jpg");
      if(($size[0] > 0) && ($size[1] > 0)) {
        echo "";
      }
    }
    echo "
";
    echo "
Author: ";
    echo $book['author'];
    echo "
ISBN: ";
    echo $book['isbn'];
    echo "
Our Price: ";
    echo number_format($book['price'], 2);
    echo "
Description: ";
    echo $book['description'];
    echo "
";
  } else {
    echo "
The details of this book cannot be displayed at this time.
";
  }
  echo "
";
}

function display_checkout_form() {
  //display the form that asks for name and address
?>
  

  

  

  
Your Details
  

    
Name
    

  
  

    
Address
    

  
  

    
City/Suburb
    

  
  

    
State/Province
    

  
  

    
Postal Code or Zip Code
    

  
  

    
Country
    

  
  
Shipping Address (leave blank if as above)
  

    
Name
    

  
  

    
Address
    

  
  

    
City/Suburb
    

  
  

    
State/Province
    

  
  

    
Postal Code or Zip Code
    

  
  

    
Country
    

  
  

    
Please press Purchase to confirm
         your purchase, or Continue Shopping to add or remove items.
     
    
  
  
  


  

  
Shipping
      
 
  
TOTAL INCLUDING SHIPPING
      
$ 
  
  


  

  

  
Credit Card Details
  

    
Type
    

        VISA
        MasterCard
        American Express
        
    
  
  

    
Number
    

  
  

    
AMEX code (if required)
    

  
  

    
Expiry Date
    
Month
       
       01
       02
       03
       04
       05
       06
       07
       08
       09
       10
       11
       12
       
       Year
       
       ".$y."";
       }
       ?>
       
  
  

    
Name on Card
    

  
  

    

      
Please press Purchase to confirm your purchase, or Continue Shopping to
      add or remove items
     
    
  
  

         
         Item
         Price
         Quantity
         Total
         ";

  //display each item as a table row
  foreach ($cart as $isbn => $qty)  {
    $book = get_book_details($isbn);
    echo "";
    if($images == true) {
      echo "";
      if (file_exists("images/".$isbn.".jpg")) {
         $size = GetImageSize("images/".$isbn.".jpg");
         if(($size[0] > 0) && ($size[1] > 0)) {
           echo "";
         }
      } else {
         echo " ";
      }
      echo "";
    }
    echo "
          ".$book['title']."
          by ".$book['author']."
          \$".number_format($book['price'], 2)."
          ";

    // if we allow changes, quantities are in text boxes
    if ($change == true) {
      echo "";
    } else {
      echo $qty;
    }
    echo "\$".number_format($book['price']*$qty,2)."\n";
  }
  // display total row
  echo "
         
        ".$_SESSION['items']."
        
            \$".number_format($_SESSION['total_price'], 2)."
        
        ";

  // display save change button
  if($change == true) {
    echo "
           
          
             
             
          
           
          ";
  }
  echo "";
}

function display_login_form() {
  // dispaly form asking for name and password
?>
 

 

   

     
Username:
     

   

     
Password:
     

   

     

     
   

 



Go to main site

Add a new category

Add a new book

Change admin password


          

"; } function display_form_button($image, $alt) { echo "

"; } ?>

book_fns.php

 query($query);
  if (!$result) {
    return false;
  }

  $num_cats = @$result -> num_rows;
  if ($num_cats == 0) {
    return false;
  }

  $result = db_result_to_array($result);
  return $result;
}

function get_category_name($catid) {
  $conn = db_connect();
  $query = "select catname from categories where catid = ".$catid."";
  $result = @$conn -> query($query);
  if (!$result) {
    return false;
  }

  $num_cats = @$result -> num_rows;
  if ($num_cats == 0) {
    return false;
  }

  $row = $result -> fetch_object();
  return $row -> catname;
}

function get_books($catid) {
  $conn = db_connect();
  $query = "select * from books where catid = ".$catid."";
  $result = @$conn -> query($query);
  if (!$result) {
    return false;
  }

  $num_cats = @$result -> num_rows;
  if ($num_cats == 0) {
    return false;
  }

  $result = db_result_to_array($result);
  return $result;
}

function get_book_details($isbn) {
  if ((!$isbn) || $isbn == '') {
    return false;
  }
  $conn = db_connect();
  $query = "select * from books where isbn = ".$isbn."";
  $result = @$conn -> query($query);
  if (!$result) {
    return false;
  }

  $row = @$result -> fetch_assoc();
  return $row;
}

function calculate_price($cart) {
  $price = 0;
  if (is_array($cart)) {
    $conn = db_connect();
    foreach ($cart as $isbn => $qty) {
      $query = "select price from books where isbn='".$isbn."'";
      $result = $conn -> query($query);
      if ($result) {
        $items = $result -> fetch_object();
        $item_price = $items -> price;
        $price += $item_price * $qty;
      }
    }
  }

  return $price;
}

function calculate_items($cart) {
  $items = 0;
  if (is_array($cart)) {
    $conn = db_connect();
    foreach ($cart as $isbn => $qty) {
      $items += $qty;
      }
  }

  return $items;
}

function calculate_shipping_cost() {
  return 20.00;
}
?>

db_fns.php

autocommit(TRUE);
   return $result;
}

function db_result_to_array($result) {
   $res_array = array();

   for ($count=0; $row = $result->fetch_assoc(); $count++) {
     $res_array[$count] = $row;
   }

   return $res_array;
}

?>

user_auth_fns.php

query("select * from admin
                         where username='".$username."'
                         and password = sha1('".$password."')");
  

  if (!$result) {
     return 0;
  }

  if ($result->num_rows>0) {
     return 1;
  } else {
     return 0;
  }
}

function check_admin_user() {
// see if somebody is logged in and notify them if not

  if (isset($_SESSION['admin_user'])) {
    return true;
  } else {
    return false;
  }
}

function change_password($username, $old_password, $new_password) {
// change password for username/old_password to new_password
// return true or false

  // if the old password is right
  // change their password to new_password and return true
  // else return false
  if (login($username, $old_password)) {

    if (!($conn = db_connect())) {
      return false;
    }

    $result = $conn->query("update admin
                            set password = sha1('".$new_password."')
                            where username = '".$username."'");
    if (!$result) {
      return false;  // not changed
    } else {
      return true;  // changed successfully
    }
  } else {
    return false; // old password was wrong
  }
}


?>

admin_fns.php

  

  ";
       }
     ?>
  

  

    
Category Name:
    

   
  

    
 align="center">
      ";
         }
      ?>
      
     
     
                

                
                
                
  

  

  ";
            }
          ?>
         

  

    
ISBN:
    

  
  

    
Book Title:
    

  
  

    
Book Author:
    

   
   

      
Category:
      

      ".$thiscat['catname']."";
          }
          ?>
          
        
   
   

    
Price:
    

   
   

     
Description:
     
<?php echo $edit ? $book['description'] : ''; ?>
    
    

      
 align="center">
         ";
         ?>
        
        
        
                   

                   
                   
                   
      
  
  

   

   

   

   
Old password:
       

   
   
New password:
       

   
   
Repeat new password:
       

   
   

   
   
   

query($query);
   if ((!$result) || ($result->num_rows!=0)) {
     return false;
   }

   // insert new category
   $query = "insert into categories values
            (0, '".$catname."')";
     
   $result = $conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}

function insert_book($isbn, $title, $author, $catid, $price, $description) {
// insert a new book into the database

   $conn = db_connect();

   // check book does not already exist
   $query = "select *
             from books
             where isbn='".$isbn."'";

   $result = $conn->query($query);
   if ((!$result) || ($result->num_rows!=0)) {
     return false;
   }

   // insert new book
   $query = "insert into books values
            ('".$isbn."', '".$author."', '".$title."',
             '".$catid."', '".$price."', '".$description."')";

   $result = $conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}

function update_category($catid, $catname) {
// change the name of category with catid in the database

   $conn = db_connect();

   $query = "update categories
             set catname='".$catname."'
             where catid='".$catid."'";
   $result = @$conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}

function update_book($oldisbn, $isbn, $title, $author, $catid,
                     $price, $description) {
// change details of book stored under $oldisbn in
// the database to new details in arguments

   $conn = db_connect();

   $query = "update books
             set isbn= '".$isbn."',
             title = '".$title."',
             author = '".$author."',
             catid = '".$catid."',
             price = '".$price."',
             description = '".$description."'
             where isbn = '".$oldisbn."'";

   $result = @$conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}

function delete_category($catid) {
// Remove the category identified by catid from the db
// If there are books in the category, it will not
// be removed and the function will return false.

   $conn = db_connect();

   // check if there are any books in category
   // to avoid deletion anomalies
   $query = "select *
             from books
             where catid=".$catid."";

   $result = @$conn->query($query);
   if ((!$result) || (@$result->num_rows > 0)) {
     return false;
   }

   $query = "delete from categories
             where catid='".$catid."'";
   $result = @$conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}


function delete_book($isbn) {
// Deletes the book identified by $isbn from the database.

   $conn = db_connect();

   $query = "delete from books
             where isbn='".$isbn."'";
   $result = @$conn->query($query);
   if (!$result) {
     return false;
   } else {
     return true;
   }
}

?>

data_valid_fns.php

 $value) {
     if ((!isset($key)) || ($value == '')) {
        return false;
     }
  }
  return true;
}

function valid_email($address) {
  // check an email address is possibly valid
  if (ereg("^[a-zA-Z0-9_\.\-]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$", $address)) {
    return true;
  } else {
    return false;
  }
}

?>

order_fns.php

autocommit(FALSE);

  // insert customer address
  $query = "select customerid from customers where
            name = '".$name."' and address = '".$address."'
            and city = '".$city."' and state = '".$state."'
            and zip = '".$zip."' and country = '".$country."'";

  $result = $conn->query($query);

  if($result->num_rows>0) {
    $customer = $result->fetch_object();
    $customerid = $customer->customerid;
  } else {
    $query = "insert into customers values
            (0, '".$name."','".$address."','".$city."','".$state."','".$zip."','".$country."')";
    $result = $conn->query($query);

    if (!$result) {
       return false;
    }
  }

  $customerid = $conn->insert_id;

  $date = date("Y-m-d");

  $query = "insert into orders values
            (0, '".$customerid."', '".$_SESSION['total_price']."', '".$date."', '".'PARTIAL'."',
             '".$ship_name."', '".$ship_address."', '".$ship_city."', '".$ship_state."',
             '".$ship_zip."', '".$ship_country."')";

  $result = $conn->query($query);
  if (!$result) {
    return false;
  }

  $query = "select orderid from orders where
               customerid = '".$customerid."' and
               amount > (".$_SESSION['total_price']."-.001) and
               amount < (".$_SESSION['total_price']."+.001) and
               date = '".$date."' and
               order_status = 'PARTIAL' and
               ship_name = '".$ship_name."' and
               ship_address = '".$ship_address."' and
               ship_city = '".$ship_city."' and
               ship_state = '".$ship_state."' and
               ship_zip = '".$ship_zip."' and
               ship_country = '".$ship_country."'";

  $result = $conn->query($query);

  if($result->num_rows>0) {
    $order = $result->fetch_object();
    $orderid = $order->orderid;
  } else {
    return false;
  }

  // insert each book
  foreach($_SESSION['cart'] as $isbn => $quantity) {
    $detail = get_book_details($isbn);
    $query = "delete from order_items where
              orderid = '".$orderid."' and isbn = '".$isbn."'";
    $result = $conn->query($query);
    $query = "insert into order_items values
              ('".$orderid."', '".$isbn."', ".$detail['price'].", $quantity)";
    $result = $conn->query($query);
    if(!$result) {
      return false;
    }
  }

  // end transaction
  $conn->commit();
  $conn->autocommit(TRUE);

  return $orderid;
}

?>

index.php

Please chose a category: 
";

$cat_array = get_categories();
display_categories($cat_array);

// If login as admin, show add, delete, edit cat link
if (isset($_SESSION['admin_user'])) {
    display_button("admin.php", "admin-menu", "Admin Menu");
}
do_html_footer(); 
?>

login.php

logout.php

Logged out.
";
  do_html_url("login.php", "Login");
} else {
  // if they weren't logged in but came to this page somehow
  echo "
You were not logged in, and so have not been logged out.
";
  do_html_url("login.php", "Login");
}

do_html_footer();

?>

admin.php

You could not be logged in.

                You must be logged in to view this page.
";
        do_html_url("login.php", "Login");
        do_html_footer();
        exit;
    }
}

do_html_header("Administrtion");
if (check_admin_user()) {
    display_admin_menu();
}else {
    echo "
You are not authorized to enter the administration area.
";
}
do_html_footer();
?>

insert_book_form.php

You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

insert_book.php

Book ".stripslashes($title)." was added to the database.
";
        }else {
            echo "
Book ".stripslashes($title)." could not be added to the database.
";
        }
    }else {
        echo "
You have not filled out the form. Please try again
";
    }
}else {
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

insert_category_form.php

You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

insert_category.php

Category \"".$catname."\" was added to the database.
";
        }else {
            echo "
Category \"".$catname."\" could not be added to the database.
";
        }
    }else {
        echo "
You have not filled out the form. Please try again
";
    }
}else {
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

delete_book.php

Book was deleted.
";
        }else {
            echo "
Book could not be deleted.
";
        }
    }else {
        echo "
No Book specified. Please try again
";
    }
    do_html_url("admin.php", "Back to administation menu");
}else {
    echo "
You are not authorized to enter the administration area.
";
}



do_html_footer();
?>

delete_category.php

Category was deleted.
";
        }else {
            echo "
Category could not be deleted.
";
        }
    }else {
        echo "
No category specified. Please try again
";
    }
    do_html_url("admin.php", "Back to administation menu");
}else {
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

edit_book_form.php

Could not retrieve book details.
";
    }
    do_html_url("admin.php", "Back to administration menu");
}else { 
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

edit_book.php

Book was updated.
";
        }else {
            echo "
Book could not be updated.
";
        }
    }else {
        echo "
You have not filled out the form. Please try again
";
    }
    do_html_url("admin.php", "Back to administation menu");
}else {
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

edit_category_form.php

Could not retrieve catogory details.
";
    }
    do_html_url("admin.php", "Back to administration menu");
}else { 
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

edit_category.php

Category was updated.
";
        }else {
            echo "
Category could not be updated.
";
        }
    }else {
        echo "
You have not filled out the form. Please try again
";
    }
    do_html_url("admin.php", "Back to administation menu");
}else {
    echo "
You are not authorized to enter the administration area.
";
}

do_html_footer();
?>

change_password_form.php

change_password.php

You have not filled out the form completely.

         Please try again.
";
   do_html_url("admin.php", "Back to administration menu");
   do_html_footer();
   exit;
 } else {
   $new_passwd = $_POST['new_passwd'];
   $new_passwd2 = $_POST['new_passwd2'];
   $old_passwd = $_POST['old_passwd'];
   if ($new_passwd != $new_passwd2) {
      echo "
Passwords entered were not the same.  Not changed.
";
   } else if ((strlen($new_passwd)>16) || (strlen($new_passwd)<6)) {
      echo "
New password must be between 6 and 16 characters.  Try again.
";
   } else {
      // attempt update
      if (change_password($_SESSION['admin_user'], $old_passwd, $new_passwd)) {
         echo "
Password changed.
";
      } else {
         echo "
Password could not be changed.
";
      }
   }
 }
 do_html_url("admin.php", "Back to administration menu");
 do_html_footer();
?>

checkout.php

There are no items in your cart
";
}

display_button("show_cart.php", "continue-shopping", "Continue Shopping");

do_html_footer();
?>

process.php

Thank you for shopping with us.Your order has been placed.
";
       display_button("index.php", "continue-shopping", "Continue Shopping");
   }else {
       echo "
Could not process your card.Please contact the card issuer or try again.
";
       display_button("purchase.php", "back", "Back");
   }
}else {
    echo "
You did not fill in all the fields, please try again.
";
    display_button("purchase.php", "back", "Back");
}

do_html_footer();

?>

purchase.php

Could not store data, please try again.
";
      display_button('checkout.php', 'back', 'back');  
    }
}else {
    echo "
You did not fill in all the fields, please try again.
";
    display_button('checkout.php', 'back', 'back');
}

do_html_footer();
?>

show_book.php

show_cart.php

 $qty) {
        if ($_POST[$isbn] == '0') {
            unset($_SESSION['cart'][$isbn]);
        }else {
            $_SESSION['cart'][$isbn] = $_POST[$isbn];
        }
    }

    $_SESSION['total_price'] = calculate_price($_SESSION['cart']);
    $_SESSION['items'] = calculate_items($_SESSION['cart']);
}

do_html_header("Your shopping cart");

// Display the cart
if ($_SESSION['cart'] && (array_count_values($_SESSION['cart']))) {
    display_cart($_SESSION['cart']);
}else {
    echo "
There are no items in your cart
";
}

$target = "index.php";
if ($new) {
    $detail = get_book_details($new);
    if ($detail['catid']) {
        $target = "show_cat.php?catid=".$detail['catid'];
    }
}

display_button($target, "continue-shopping", "Continue Shopping");
display_button("checkout.php", "go-to-checkout", "Go To Checkout");

do_html_footer();
?>

show_cat.php

说明

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