Completing a Configuration for Chrome and a Server - Using PHP require()
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This test application will use a PHP require function to insert the XUL source file into the output stream being returned to the user. The code will execute the same user test, and if the user is registered, a PHP variable will be set to the login time, and a require statement will be set to merge the XUL source file into the output stream. The XUL source file will be changed to pass the login time to the status label. Figure 4-10 illustrates the logic.
Figure 4-10. PHP Login sequence
If we were to use only a require script to serve a XUL file, we would not be able to merge PHP statements to set the status field of our interface. But by renaming only the startupScreen.xul file to startupScreen.php, the PHP interpreter would send the XUL source file to the web server without sufficient information to instruct the browser of the required media type.
To allow PHP to properly serve the XUL file, we must make a change to our php.ini file:
short_open_tag = Off
This tells the PHP interpreter to ignore parsing the tags <? and ?>, except for those that include the PHP token. Otherwise, PHP would attempt to interpret the XMLstructured XUL content.
Our renamed startupScreen.php file must also include a PHP directive to set the content type of the text being sent to the browser. The first line in our startupScreen.php file must be changed to:
<?php header("Content-type: application/vnd.mozilla.xul+xml"); ?>
<?xml version="1.0"?>
<?xml-stylesheet href="NewsSearchStyles.css"
type="text/css"?>
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 This article is excerpted from chapter four of Programming Firefox, written by Kenneth C. Feldt (O'Reilly, 2007; ISBN: 0596102437). Check it out today at your favorite bookstore. Buy this book now.
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