PHP Exercise 2

Mixing HTML and PHP

1. The following is an example from the www.php.net tutorial on mixing PHP and HTML code. I made a file called browser_test.php and inserted the following:

<?php

if (strstr($_SERVER["HTTP_USER_AGENT"], "MSIE"))

{

?>

<h3>strstr must have returned true</h3> <center><b>You are using Internet Explorer</b></center>

<?php }

else {

?>

<h3>strstr must have returned false</h3> <center><b>You are not using Internet Explorer</b></center>

<?php }

· Notice here that instead of using echo() statements to print HTML code to the screen, we exited php with the ?> and went back to regular HTML code. Then when we were done with our HTML coding we entered back into PHP coding with <?php .

2. The same can be accomplished using echo() statements with the following (I named this file browser_test2.php):

<?php

if (strstr($_SERVER["HTTP_USER_AGENT"], "MSIE"))

{

echo "<h3>strstr must have returned true</h3> <center><b>You are using Internet Explorer</b></center> ";

}

else

{

echo "<h3>strstr must have returned false</h3> <center><b>You are not using Internet Explorer</b></center> ";

}

?>

· Note: $_SERVER is a special reserved PHP variable that contains all web server information. It's known as an Autoglobal (or Superglobal). All predefined (Autoglobals) variables begin with $_ instead of just $. See the related manual page on Autoglobals for more information.

3. From this point forward, I will assume that you know HTML code. If you don't know HTML code, please refer to http://www.pagetutor.com.