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PHP is a valuable item in any Web developer's toolbox. The server-side technology allows for rapid development of dynamic, database-driven applications. One of PHP's major strengths is its ability to connect with many different databases, including Sybase, PostgreSQL, Oracle, or MySQL.
Database connectivity, however, is also one of PHP's major weaknesses. Specifically, PHP's lack of a standard database API makes switching databases difficult and costly once an application has been written. For example, if you write a program that uses a MySQL database on the back end, and you want to modify that program so that it uses a Sybase database, you'll most likely spend hours modifying the code.
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This lab series is not a tutorial on writing PHP programs or scripting dynamic Web pages. Rather its intent is to demonstrate how you can use PHP to separate the different elements that make up well designed and valid Web pages into their component parts and have these parts adapt in certain powerful ways. These components correlate almost exactly with the modular design of XHTML itself. Any number of other open-source languages such as Perl or Python could be used to achieve the same goal. Or commercial ones certainly, but let?s not go there.
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There are a number of great online GIS ( Geographic Information System ) solutions out there, ranging from Mappoint to Mapquest to some cool PHP projects. However, it is still nice to be able to be able plot you own data and put some basic mapping utilities on your site with a minimum of fuss and bother. Over the next couple of articles I will hopefully be able to give you a few pointers on how to create you own basic GIS system for free. I do not claim to be a GIS expert, and there may be better ways to do things, but hopefully these articles will give you a start in the right direction.
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Apache is maintained by the Apache Software Foundation?s Apache Server Project at www.apache.org. The Apache Web server, for those of you who haven?t heard of it, is arguably the most popular Web server in use on the Internet today. While Microsoft contends that its Internet Information Server (IIS) is making huge gains, it?s still struggling in many ways against Apache. The reasons are not hard to seek. For starters, you don?t have to be running Windows to run Apache. It was first developed on the various Unix/Linux/BSD platforms, then recently ported to Win32. The IIS, while a good Web server on the NT platform, is trapped in the "Windows-only" world. While IIS has many handy features, not everyone wants to run NT for their Web server?s OS.
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PHP (http://www.php.net) is a powerful server side web scripting solution. It has quickly grown in popularity and according to the 2000 January Netcraft Web Server Survey PHP is installed on 12.8% of all web sites. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly.
Being a good PHP hacker isn't just about writing single line solutions to complex problems. For example, web gurus know that speed of coding is much more important than speed of code. In this article we'll look at techniques that can help you become a better PHP hacker. We'll assume that you have a basic knowledge of PHP and databases.
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