Housing and Dining Online by Andrew Gorges

Outline  Overview of PHP  Overview of MySQL  Using PHP  Using MySQL  PHP and MySQL together  Production Application  Role of Verisign

PHP Overview  Easy learning curve  Syntax very similar to C  Large function library  Embedded directly into HTML  Interpreted, no need to compile  Platform Independent  Web Server Independent  Free and Open Source

Simple PHP  PHP code must be surrounded with special tags  Opening tag:  Opening tag:  Write text to the browser with the echo command  To write Hello, World! to the broswer, include the following in hello.php  Hello, World ”; ?>

PHP Form Data  Access to the HTTP POST and GET data is simple in PHP  The global variables $_POST[] and $_GET[] contain the request data <?php if ($_POST["submit"]) if ($_POST["submit"]) echo " You clicked Submit! "; echo " You clicked Submit! "; else if ($_POST["cancel"]) else if ($_POST["cancel"]) echo " You clicked Cancel! "; echo " You clicked Cancel! ";?> </form>

PHP Sessions  Sessions store their identifier in a cookie in the client’s browser  Every page that uses session data must be proceeded by the session_start() function  Session variables are then set and retrieved by accessing the global $_SESSION[] <?php session_start(); session_start(); if (!$_SESSION["count"]) if (!$_SESSION["count"]) $_SESSION["count"] = 0; $_SESSION["count"] = 0; if ($_GET["count"] == "yes") if ($_GET["count"] == "yes") $_SESSION["count"] = $_SESSION["count"] + 1; $_SESSION["count"] = $_SESSION["count"] + 1; echo " ".$_SESSION["count"]." "; echo " ".$_SESSION["count"]." ";?> Click here to count Click here to count

MySQL Overview  Fast, free, stable database  Syntax is similar to Oracle  Many of the same features as Oracle  Production version still missing subqueries, stored procedures, and triggers  Frequently used in conjunction with Linux, Apache, and PHP

Creating a Table  Making a new table is rather easy in MySQL  CREATE TABLE books ( idNumber int primary key auto_increment, title varchar(30), author varchar(30) );

Inserting Data  The insert statement is straightforward  INSERT INTO books (title,author) VALUES( “Let Freedom Ring”, “Sean Hannity” );

Other Operations  ALTER TABLE books ADD COLUMN subtitle varchar(50) AFTER title;  UPDATE books SET subtitle=“Winning the War of Liberty over Liberalism” WHERE idNumber=1;  SELECT * FROM books;  DELETE FROM books;

MySQL and PHP Together <?php include("/var/db.php"); include("/var/db.php"); $dbLink = mysql_connect("localhost", $dbUser, $dbPass); $dbLink = mysql_connect("localhost", $dbUser, $dbPass); $sql = "SELECT * FROM books"; $sql = "SELECT * FROM books"; $res = mysql_db_query("test", $sql, $dbLink); $res = mysql_db_query("test", $sql, $dbLink); $row = mysql_fetch_assoc($res); $row = mysql_fetch_assoc($res); $title = $row["title"]; $title = $row["title"]; $subtitle = $row["subtitle"]; $subtitle = $row["subtitle"]; $author = $row["author"]; $author = $row["author"];?> Title Sub Title Author Title Sub Title Author $title $subtitle $author ";?> $title $subtitle $author ";?></tr></table>

Production Application  Early Room Preference System Online  Heavy use of MySQL database for room maps  Uses Verisign’s PayFlowPro™  All information passes over Secure Socket Layer

System Architecture MySQL PHP Verisign PayFlowPro Web Browser

Role of Verisign  Provide the Secure Server Certificate  Provide PayFlow Pro™ Interface $transaction = array( 'USER' => 'ksuhousing',  'PWD' => ‘*********',  'PARTNER' => 'VeriSign',  'TRXTYPE' => 'S',  'TENDER' => 'C',  'AMT' => 25.00,  'ACCT' => $number,  'EXPDATE' => $expDate, 'COMMENT1' => 'App Payment', 'COMMENT1' => 'App Payment',  'STREET' => stripslashes($address),  'ZIP' => $zip  );  //execute the transaction  $response = pfpro_process($transaction);

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