Website Development

1
Website Development Management
CIT 3353 -- Fall 2006 www.clt.astate.edu/jseydel/m
is3353

• A PHP Exercise

Instructor John Seydel, Ph.D.
2
Student Objectives

• Upon completion of this class meeting, you
  should
• Be able to specify redirection to other pages
• Become comfortable with string concatenation
• Be able to format numeric output appropriately
• Be able to write complex formulae involving
  exponentiation

3
Miscellaneous

• Exam 1
• No, its not graded
• ETA Tuesday
• Quiz 4
• A little better
• Return
• Homework due today
• Exam 1 (on server?) ? basis for todays exercise
• Job Fair Where was everybody?!
• Meloni, Chapters 5-7

4
Preparing for the Exercise

• Open these applications
• Internet Exploiter
• SmartFTP
• PHP Designer or NotePad
• My Computer
• Copy files from SuSE1 public_html and rename
• calc_temp.php ? calc.php
• calc_proc_temp.php ? calc_proc.php
• Use c\ProgramFiles\ApacheGroup\Apache2\htdocs
• Delete all original files if possible
• Transfer exercise files later to jump drive if
  desired
• Create directories on SuSE1
• Within public_html ? fki
• Within fki ? scripts

5
Review Browser/Server Interaction
6
A PHP Application

• Note the example
• www.suse1.astate.edu/ford-j/fki
• Monthly payments
• Inputs
• A Loan
• n Term (months)
• i Interest (monthly, decimal)
• Output monthly payment (Pmt)
• Finally, note the use of the term application
• No longer simply a web page
• Instead, an application program with numerous
  interdependent components
• Interface pages
• Input
• Output
• Include files
• Processing units
• Other important files

7
What Needs to be Done

• Note the handout
• Form file is complete
• Processor file (calc_proc.php) needs to be edited
• View these in the browser
• Look at all the warnings
• Why are they there?
• Open the processor file in an editor
• Work along as we add the necessary scripting
• When done, upload files to your /fki/scripts
  directory on SuSE1

8
Whats Being Illustrated

• Rudimentary form validation (server-side)
• String manipulation
• Concatenation
• Simple operator .
• Assignment operator .
• Mixing literals and variables
• Escape character
• PHP functions (refer to Appendix B)
• header()
• print() or echo()
• pow()
• number_format(value) and number_format(value,place
  s)
• Fairly complex formula (a common business
  application)
• General code development and concurrent testing

9
Summary of Todays Objectives

• Specify redirection to other pages
• Become comfortable with string concatenation
• Format numeric output appropriately
• Write complex formulae involving exponentiation

10
Appendix
11
Loan Amortization Formula

• Let
• assuming interest (decimal) and term are
  converted to monthly
• Then