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Table of Contents
Open Source Web Development with LAMP: Using Linux, Apache, MySQL, Perl, and PHP
By
James Lee, Brent Ware
Topics covered include:
A comprehensive survey of Open Source technologiesStatic and dynamic data and embedded HTML on the WebLinux and Unix distributions, installations, and commandsApache Web Server, Perl, and MySQLWeb site META language (WML)Common gateway interface (CGI) and mod_perlServer Side Includes (SSI), Embperl, and MasonPHP syntax and functionsIn addition to the discussions in the book, a companion Web site-www.opensourcewebbook.com-contains supplemental information, including tools, source code, helpful links to additional resources, and errata as needed.Complete in coverage and practical in presentation, Open Source Web Development with LAMP spotlights the tools and technologies today''''s developers need to create workable, dynamic, and secure Web sites using Open Source technologies.
12.4 A Couple of Quick Examples
We'll start with two quick examples. Create a new directory for PHP work and cd into it:
$ mkdir /var/www/html/php
$ chmod a+rx /var/www/html/php
$ cd /var/www/html/php
Create a PHP file named hello.php:
[4][4] Remember the permissions, 644.
<html>
<head>
<title>Hello, world! with PHP</title>
</head>
<body bgcolor="#ffffff">
<? echo "hello, world!" ?>
</body>
</html>
To view the result of this file, load either one of these URLs: http://localhost/php/hello.php or www.opensourcewebbook.com/php/hello.php. The result can be seen in Figure 12.1.
Figure 12.1. hello, world! with PHP
The PHP code is embedded in the HTML within the <? ... ?> tag. In this example the PHP code simply echoes (displays) the string "hello, world!". The echo PHP statement outputs a string that eventually is rendered in the browser.Now that the obligatory "hello, world!" example has been done with PHP, try a built-in function that does a lot of work: phpinfo(). Place this code into phpinfo.php:
<html>
<head>
<title>PHP Information</title>
</head>
<body bgcolor="#ffffff">
<? phpinfo() ?>
</body>
</html>
The function phpinfo() builds a page with a wealth of useful information on how PHP was built, the PHP environment, etc. To view the result, load either of these URLs: http://localhost/php/phpinfo.php or www.opensourcewebbook.com/php/phpinfo.php. The result of this can be seen in Figure 12.2.
Figure 12.2. PHP information with phpinfo()
