CECS 5100 User Session

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CECS 5100User Session Files

• Dr. Jones

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Review

• Assignment 1 (example)
• Assignment 2 ?
• Forms
• Other Questions ?

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Midterm Review

• 20 points
• Fill in the blanks
• On Programming
• On Concepts
• On Process
• Short Answers
• I will be making the word file available online
  and you have several days to complete it.

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User Session

• Pages 203-212
• Super Global _SESSION
• Purpose Track a user between pages and when they
  later come back
• Can avoid using Hidden value between forms
• Warning Dont use for security. You cant be
  sure that an old session is the same person --
  just the same computer.

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User Session

• Assign User Session
• Store Variables (array) Related to User Session
• Like for storing preferences or other information
• Tracking choices between forms

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Files

• Pages 213-236
• Files allow us to store information
• Next phase we will move from files to databases
• Testing Files (p. 218)
• file_exists(), is_file(), is_readable(), etc
• Opening (p. 222)
• fp fopen(filename, r)
• fp is the variable that points to the file being
  open
• Filename is the path and the name of the file to
  be opened
• r is for read, it can be a for append, w for
  write, etc

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Files

• Read (p. 224, listing 11.9)
• For assignment 3, read by line
• fgets(), feof()
• Write
• Write overwrites a file -- from the beginning --
  thus can destroy data
• Append (p. 228)
• Append, adds to the of the file.
• fputs()
• Close
• fclose()

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Assignment 3 - Part 1

• MEMBERSHIP_FILE
• create a file named MEMBERSHIP_FILE
• Upload or used an editor to create it
• in that file place the following information
• Greg,Jones,gjones_at_unt.edu,password
• Gerald,Jones,gjones_at_unt.edu,test
• place that file in the assignment directory. You
  will be reading and appending to that file for
  this assignment.
• It has to be TEXT and each line has to contain a
  CR (carriage return)

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Assignment 3 - Entry Page

• Upon entry to the page, start or resume a session
  ID.
• Note The session ID will be used to retain who
  the user is as they move between the different
  pages of this assignment and using session
  variables to track various states (have they
  logged in ?, etc).
• The entry page will present a group or store
  front (of your own creation). Graphics, What we
  do, etc.
• It will provide the user with the following
  links.
• New Member
• Membership Information

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Assignment 3 - New Member

• Present the user with a form asking for
• First Name, Last Name, e-mail address
• present a link back to the first page.
• upon form submission
• Check to ensure all fields have been entered
• then check the above fields against the
  MEMBERSHIP_FILE (using the read file commands)
• If all three fields exist in an entry stored in
  MEMBERSHIP_FILE, then inform the user that they
  are already a member and provide them a link to
  the membership information page.

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Assignment 3 - New member

• if they are not in the MEMBERSHIP_FILE
• Generate a password (it doesn't have to be secure
  for this assignment)
• append to the MEMBERSHIP_FILE the new members
  information in the format as provided for at the
  top of the assignment. First Name, Last Name,
  e-mail Address, and the password you just
  assigned -- all seperated by commas.
• present the user with a page thanking them for
  joining and inform them what their new password
  is.
• provide them with a link to home or to the
  membership information page

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Assignment 3 - Member Info

• if the session ID variable to indicate logged in
  or not shows that the user has already entered a
  password, then display the membership information
  and skip the rest of this task.
• If not already logged in, then ask for the users
  First Name, Last Name, and Password

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Assignment 3 - Member Info

• Check the MEMBERSHIP_FILE for that information
• If it exists in the MEMBERSHIP_FILE, set a
  session ID variable to indicate that the user is
  logged in and then display a page that shows all
  the information in the file for that user
• If the First and Last Name match, but the
  password is wrong, say that the password is
  incorrect and provide a link to the password help
  page. Save the First and Last Name to session ID
  variables.
• If first and last name do not exist, give the
  user an option of going to the new member page or
  home.

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Assignment 3 - Password Help

• Ask the user for their e-mail address
• check the e-mail, first and last names (from
  session ID variable) and if they all match one in
  the MEMBERSHIP_FILE provide a page with the
  password for the user's entry.
• If it doesn't exist in the MEMBERSHIP_FILE
  provide a page that says sorry not in the
  membership file and provide a link to home or new
  member.

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Questions ??