The Book of JavaScript, 2nd Edition

To Do List Server Side

This example uses only two straightforward PHP programs. The first, readXMLFile.php, reads in an XML file; it is almost a copy of the code in Figure 16-16. If a HEAD request was sent, readXMLFile.php returns only the last-modified date of the file. If a GET request is sent, readXMLFile.php reads the requested file from the webserver and passes it to the browser. The only difference between Figure 16-16 and readXMLFile.php is that readXMLFile.php sends an additional header when responding to a GET request:

header("Content-Type: text/xml");

The second server-side program, saveXMLFile.php, saves an XML file. Figure 17-9 shows the PHP code. As I hope you'll see, it's very similar to the program we used to write out a text file ...