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Download PDF by Christopher Cosentino: Advanced PHP for Web Professionals

By Christopher Cosentino

Take your personal home page programming abilities to the following point, with this hands-on, example-rich instructional! In Advanced Hypertext Preprocessor for internet Professionals, best-selling personal home page writer Christopher Cosentino brings jointly dozens of strong new suggestions for development severe net functions. easy methods to deal with classes extra successfully, create higher kinds, increase customized errors handlers, construct database-independent internet functions with PEAR::DB, parse XML records, authenticate clients through database question, construct cross-platform customer apps with PHP-GTK, and lots more and plenty extra!

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Body> 30. Script 2-3. php Line-by-Line Explanation LINE DESCRIPTION 2 Start the session or continue an existing session. 4–13 Print out the beginning of the HTML page. 14–17 Greet the users and show some of their current settings. 19–26 Execute a while loop that goes though the user's settings in the $news_prefs session variable. Print the key of the array item to the screen. If the value of the current array item is enabled, then print "Enabled" on the screen; otherwise, print "Disabled" on the screen.

If you are starting a new session, then the function initializes the session and creates the necessary temp files to track the session. If a $PHPSESSID is found by the function, either by a cookie or a GET variable, then the function resumes the current session and the page has access to any variables that have been registered to the session. Once you have started the session, you need to register some variables with it. The session will not track variables until they have been registered using the session_register() function: session_register(STRING); The STRING argument to session_register() should be the name of the variable that you want to register with the session so that it may be accessed across any session-enabled pages.

44. > items in your cart. 45.


47. 0) { 49. > 50. php> 51. "> 52.

53. Script 2-5. php Line-by-Line Explanation LINE DESCRIPTION 2 Start the session or continue an existing session. 3–10 Create an array to be used as the items available in the store. 11 Declare a new function populate_cart(). This function sets up the user's shopping cart. 12 Declare some global variables for the user.

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