Read e-book online Advanced PHP for Web Professionals PDF

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 complicated personal home page for net execs, best-selling Hypertext Preprocessor writer Christopher Cosentino brings jointly dozens of strong new thoughts for development severe internet functions. deal with periods extra successfully, create larger kinds, improve customized blunders handlers, construct database-independent internet purposes with PEAR::DB, parse XML records, authenticate clients through database question, construct cross-platform patron apps with PHP-GTK, and masses extra!

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Additional info for Advanced PHP for Web Professionals

Example text

Remember that even if a variable is unregistered with a session, the variable still exists with its value intact on the current page. This next script demonstrates the use of the session_destroy() function. php 1. 13. > 14. > 15. php method=post> 16.
17.

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. 3–6 Register session variables for use throughout the session. 8–17 Print out the beginning of the HTML page. 19 Declare a new function, load_user_data(). 20 Allow the function to use and modify variables in the global scope of the script.

The condition required to continue the for loop— In the above example, while $i is less than the size of the $array, the for loop continues to be executed. Statement to modify the counter on each pass of the loop— In the above example, $i++ increments the counter after each loop. Top Foreach Loops Foreach loops allow you to quickly traverse through an array. $array = array("name" => "Jet", "occupation" => "Bounty Hunter" ); foreach ($array as $val) { echo "

$val"; } Prints out:

Jet

Bounty Hunter You can also use foreach loops to get the key of the values in the array: foreach ($array as $key => $val) { echo "

$key : $val"; } Prints out:

name : Jet

occupation : Bounty Hunter Top While Loops While loops are another useful construct to loop through data.

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Advanced PHP for Web Professionals by Christopher Cosentino


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