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Open Source Web Development with LAMP Using Linux, Apache, MySQL, Perl, and PHP [Electronic resources] - نسخه متنی

James Lee, Brent Ware

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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

></a> <p/><p/>Publisher : Addison Wesley <p/><p/>Date Published : December 17, 2002 <p/><p/>ISBN : 0-201-77061-X <p/><p/>Pages : 496 <p/><p/><p/><p/><p/>Open Source technologies are providing contemporary developers with a range of cost-effective and robust alternatives to commercial software for building dynamic, data-driven Web applications. This practical guide presents a comprehensive survey of LAMP (Linux, Apache, MySQL, Perl, and PHP), and it shows how these solutions can be implemented efficiently and securely while improving reliability and dramatically cutting costs.<p/>Open Source Web Development with LAMP focuses on the most important core material necessary so that developers can Topics covered include:

A comprehensive survey of Open Source technologies

Static and dynamic data and embedded HTML on the Web

Linux and Unix distributions, installations, and commands

Apache Web Server, Perl, and MySQL

Web site META language (WML)

Common gateway interface (CGI) and mod_perl

Server Side Includes (SSI), Embperl, and Mason

PHP syntax and functions

In 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.
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10.4 A Quick Example


Let's start with a quick example to display "hello, world!" with Embperl (what else?). Create the file /var/www/html/embperl/indexl with the following contents (remember to chmod a+r indexl
[3]):

[3] In general, if you have any problems, check your permissions. Don't make us say this again.



[-
$msg = ´hello, world!´; 
-] 
<html> 
<head> 
<title>hello, world with Embperl</title> 
</head> 
<body bgcolor="#ffffff"> 
[+ $msg +] 
</body> 
</html>

To see the result of this page, load one of the following into your browser: http://localhost/embperl/ or www.opensourcewebbook.com/embperl/. You should see something like Figure 10.1.


Figure 10.1. hello, world! with Embperl


The first part of indexl is an Embperl command denoted by [- ... -]. We discuss this later in this chapter, but for now suffice it to say that the code within this command is executed as Perl code. In this example, $msg is set to a familiar message that is included in the HTML within the <body> tags.

To include the contents of the variable $msg, use the Embperl command [+ $msg +]. This command is replaced by the value of the variable $msg. This value is then displayed in the browser.


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