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Your First PHP Script
It would be unfair of me to help you get everything installed and noteven give you a taste of what a PHP-driven Web page looks like until "Getting Started with PHP", so here's a little something to whet
your appetite.Open up your favourite text or HTML editor and create a new file called today.php.
Windows users should note that, to save a file with a .php extension
in Notepad, you'll need to either select All Files as
the file type, or surround the file name with quotes in the Save As dialogue;
otherwise, Notepad will helpfully save the file as today.php.txt,
which won't work. Mac OS users are advised not to use TextEdit to edit .php files,
as it saves them in Rich Text Format with an invisible .rtf file
name extension. Learn to use the vi editor in a Terminal
window or obtain an editor that can save .php files as
plain text.Whichever editor you use, type this into the file:
<html>
<head>
<title>Today's Date</title>
</head>
<body>
<p>Today's Date (according to this Web server) is
<?php
echo( date('l, F dS Y.') );
?></p>
</body>
</html>
If you prefer, you can download this file along with the rest of the
code in this book in the code archive. See the "Introduction" for
details on how to download the archive.Save this material, and place it on your Website as you would any regular
HTML file, then view it in your browser. Note that if you view the file on
your own machine, you cannot use the File, Open feature
of your browser, because your Web server must intervene to interpret the PHP
code in the file. Instead, you must move the file into the root
document folder of your Web server software (e.g. C:\inetpub\wwwroot\ in
IIS, or C:\Apache Group\Apache\htdocs\ in Apache for
Windows), then load it into your browser by typing http://localhost/today.php.
This process allows the Web server to run the PHP code in the file and replace
it with the date before it's sent to the Web browser. "Output of today.php" shows
what the output should look like.
Output of today.php
Pretty neat, huh? If you use the View Source feature
in your browser, all you'll see is a regular HTML file with the date in it.
The PHP code (everything between <?php and ?> in
the code above) has been interpreted by the Web server and converted to normal
text before it's sent to your browser. The beauty of PHP, and other server-side
scripting languages, is that the Web browser doesn't have to know anything
about it — the Web server does all the work!And don't worry too much about the exact code I used in this example.
Before too long you'll know it like the back of your hand.If you don't see the date, then something is wrong with the PHP support
in your Web server. Use View Source in your browser to
look at the code of the page. You'll probably see the PHP code there in the
page. Since the browser doesn't understand PHP, it just sees <?php
... ?> as one long, invalid HTML tag, which it ignores. Make sure
that PHP support has been properly installed on your Web server, either in
accordance with the instructions provided in previous sections of this chapter,
or by your Web host.
