New PDF release: Advanced PHP for Web Professionals

By Christopher Cosentino

ISBN-10: 0130085391

ISBN-13: 9780130085399

Take your Hypertext Preprocessor programming abilities to the following point, with this hands-on, example-rich educational! In complex personal home page for internet pros, best-selling personal home page writer Christopher Cosentino brings jointly dozens of robust new recommendations for construction severe internet purposes. methods to deal with periods extra successfully, create greater varieties, increase customized errors handlers, construct database-independent net functions with PEAR::DB, parse XML records, authenticate clients through database question, construct cross-platform purchaser apps with PHP-GTK, and masses extra!

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Extra info for Advanced PHP for Web Professionals

Sample text

Function load_user_data(){ 20. global $first, $last, $email, $news_prefs; 21. $first = "Faye"; 22. $last = "Valentine"; 23. com"; 24. $news_prefs = array( 25. "Local" => 0, 26. "Nation" => 1, 27. "World" => 1, 28. "Comics" => 0, 29. ); 30. } 31. load_user_data(); 32. > 33.

Welcome

34. > 35.

Your settings have been loaded. 36. php>View Your Settings. 37. 38. Figure 2-2. php Script 2-2. php Line-by-Line Explanation LINE DESCRIPTION 2 Start the session or continue an existing session.

Another example, but this time with an "else" clause: $a = 5; $b = "10"; if($a > $b) { echo "$a is greater than $b"; } else { echo "$a is not greater than $b"; } PHP doesn't care that $a is an integer and $b is a string. It recognizes that $b also makes a pretty good integer as well. " It's also important to note that you don't say, "$a is less than $b," since it is possible that $a could be equal to $b. If that is the case, then the second part of the expression, the else statement, is the part that runs.

3–5 Check to see if the $destroy variable is set. If it is, then the user has pressed the "Destroy" button. 6–10 If $destroy has not been set, then register a session variable named $name and assign that variable the value "Spike". 13–14 Print out the current session ID and the value of the $name variable. 15–18 Display a form to the user that allows him or her to reload the current page or destroy the session variable associated with the current session. If the user reloads the page (by clicking "Reload" or using the browser's reload button), then the session variables are reset and the value for session ID is displayed.

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Advanced PHP for Web Professionals by Christopher Cosentino


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