Advanced PHP for Web Professionals by Christopher Cosentino

By Christopher Cosentino

Take your personal home page programming talents to the subsequent point, with this hands-on, example-rich instructional! In complex personal home page for internet execs, best-selling Hypertext Preprocessor writer Christopher Cosentino brings jointly dozens of robust new recommendations for development severe net purposes. the right way to deal with periods extra successfully, create larger kinds, increase customized mistakes handlers, construct database-independent internet functions with PEAR::DB, parse XML documents, authenticate clients through database question, construct cross-platform patron apps with PHP-GTK, and lots more and plenty extra!

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Ini will not work correctly under Windows. save_path = C:/temp You could also leave the value as /tmp and create a directory named "tmp" at the root of the drive on which your Web server resides. ini. save_path has not been set correctly on Windows is if Apache crashes when you try to load a session-enabled page. On Linux If you are using Linux, you need to make sure that your /tmp directory can be written to by the user who runs the Web processes. Typically this is the user nobody, and most systems, by default, allow the nobody user to write to the /tmp directory.

Html> 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.

The equals sign should be obvious; it assigns a value to a variable: $a = 4; $b = $a; // $b = 4 Comparison Operators PHP supports the standard comparison operators, as shown in Table 1-1: Table 1-1. "; $sentence_c = $a . "; Top Arrays PHP supports both numerical arrays (array items are indexed by their numerical order) as well as associative arrays (array items are indexed by named keys). $a = array(1, 2, 3, 4); //$a[0] = 1 //$a[1] = 2 //$a[2] = 3 //$a[3] = 4 $b = array("name"=>"Fred", "age" => 30); //$b['name'] = "Fred" //$b['age'] = 30 Top If/Then Statements One of the most common PHP language constructs that you will encounter is the if/then statement.

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