用PHP和MySQL构建一个在线交易应用程序案例。

海绵宝宝发布于2018/06/05

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1.Widhy Hayuhardhika NP, S.Kom Building an online bidding application using PHP/MySQL

2.Outline Topic # 1 MySQL Connection

3.Overview of database structure Connecting to MySQL database Selecting the database to use Using the require_once statement MySQL Database Connection

4.Database: auction Tables tblaccount tblbiditems tblbidhistory Overview of Database connection

5.This will hold the account info of bidders/ auctioneers Table structure Column accountid : integer, primary key, auto-increment Column username : string 50 chars Column password : string 50 chars Table tblaccount

6.This will hold the items auctioned for bidding Table structure Column biditemid : integer , primary key, auto-increment Column accountid : string 50 chars This identifies the auctioneer Column biditem : string 50 chars Column biddesc : tiny text Table tblbiditems

7.This will hold the bid info for each item being auctioned Table structure Column bidhistoryid : integer , primary key, auto-increment Column accountid : integer Column biditemid : integer Column bidprice : double Column dtesubmitted : datetime Table tblbidhistory

8.Function mysql_connect: Creates a connection to MySQL Syntax: mysql_connect($hostname, $username,$password) Ex: $conn=mysql_connect(“localhost”, “root”,”password”) Function mysql_select_db Specifies the database in MySQL for use Syntax: mysql_select_db($database, $connection) Ex: mysql_select_db(“auction”, $conn) Function die Terminates execution of PHP script Connecting to databases:

9.Create file dbconnect.inc For code reuse, a separate file can be created to connect to the database PHP pages can call dbconnect.inc to connect yo the auction database Connecting to MySQL and selecting auction database

10.Function require_once() Loads a file into a PHP script Reusing the database connection

11.Outline Topic # 2 Creation of Accounts

12.HTML form handling MySQL commands Function mysql_query() Function mysql_error() Adding records SQL insert statement Creation of accounts

13.Create: File index.html File addaccount.html File addaccountprocess.php $_POST array HTML form handling

14.First page that displays Provide the user with the option to create accounts File index.html

15.Displays a form for accepting new account info File addaccount.html

16.$_POST array Special arrays that hold all form variables Function mysql_query() Executes an SQL statement on the database Function mysql_error() Displays error encountered when executing an SQL statement SQL Insert Adds a record on a database table File addaccountprocess.php

17.File addaccountprocess.php script

18.Username: auctioneer1 This account will place items for bidding Usernames: bidder1, bidder2 These account will bid for item auctioned off Create accounts:

19.Outline Topic # 3 Managing Logins

20.SQL select statement Function mysql_num_rows Function isset() Session URL rewriting Querystring $_GET array Create: File login.php File loginverify.php File checkstatus.inc File menu.php Managing logins

21.Example 1: select * from tblaccount Selects all columns/ rows from table tblaccount Example 2: select username, password from tblaccount Selects columns username and password for all rows in table tblaccount Example 3: select * from tblaccount where username=‘jundolor’ Selects all columns from table tblaccount for all rows whose column username contains ‘jundolor’ Example 4: select accountid from tblaccount where username=‘media’ Selects column accountid from tblaccount for all rows whose column username contains ‘media’ SQL select statement

22.Retrieves the number of rows from a result set Can only be used for SQL select statements Function mysql_num_rows

23.Checks if a variable exist Example: isset($name) This check if the variable $name exist Function isset()

24.Special variables stored in web servers Allows passing of information between web pages Call the function session_start() at the start of scripts that will use sessions Sessions

25.Querystring Information can be passed on by appending variable/value to the URL $_GET array Special array that holds all querystring values URL Rewriting

26.File login.php code

27.File login.php browser shot

28.File loginverify.php code

29.File checkstatus.inc code