CodeIgniter is becoming well known for its power as a PHP based web application framework, but it’s not often that we see examples of it being used for anything else. Today we’ll learn how we can use CodeIgniter to create a RESTful API for your existing web applications, and demonstrate how to interact with your own API or other RESTful web-services, such as Facebook and Twitter.

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In this week’s Plus tutorial, we will learn how to work with file operations using PHP. This is one of the most fundamental subjects of server side programming in general. Files are used in web applications of all sizes. So let’s learn how to read, write, create, move, copy, delete files and more. Help give back to Nettuts+, and become a Plus member!

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Last Friday, we learned how to utilize a tool called Zen-Coding to rapidly speed up our development time when creating mark-up. In today’s Plus video tutorial, we’re going to take another huge leap forward, specifically with CSS, where I’ll show you how to utilize a different tool, called “Scaffold,” created by Anthony Short.

This will allow you to use variables, functions (mix-ins), for statements, and to even create grids on the fly with ease! I promise you that, if you’re mildly familiar with PHP, this will drastically change – and improve – the way you code your CSS! Become a Plus member to watch!

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cURL is a tool for transferring files and data with URL syntax, supporting many protocols including HTTP, FTP, TELNET and more. Initially, cURL was designed to be a command line tool. Lucky for us, the cURL library is also supported by PHP. In this article, we will look at some of the advanced features of cURL, and how we can use them in our PHP scripts.

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Dynamic web pages are great; you can adapt the resulting page to your user, show other user’s activity, offer different products to your customers based on their navigation history, and so on. But the more dynamic a website is, the more database queries you’ll probably need to perform. Unfortunately, these database queries consume the largest portion of your running time.

In this tutorial, I will demonstrate a way to improve performance, without running extra unnecessary queries. We’ll develop a query caching system for our data layer with small programming and deployment cost.

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CodeIgniter is a simple and powerful open source web application framework for PHP. Today, we’ll do some core “hacks” to this framework to change and improve its functionality. In the process, you’ll gain a better understanding of the intricacies of CodeIgniter.

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CodeIgniter is an open source PHP web application framework with a lot of features. Recently, thanks to the latest update, a new feature was added to this framework, called the Cart Class. In this tutorial, we’re going to take advantage of this new class, and write a shopping cart system, with a touch of jQuery added in.

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FirePHP is a Firefox plugin and server-side library combination which allows you to send all sorts of juicy info from your web application directly to your browser, much like the console.log() functionality with JavaScript. In this PLUS tutorial and companion screencast, we’ll teach you how to get started from the very beginning! Join TUTS Plus.

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In this tutorial, we will build a RSS 2.0 Feed with the PHP framework CodeIgniter. After this tutorial, you will be able to build a feed for any custom website in no time at all.

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Flickr is, without doubt, the biggest and best photography website on the internet. There are lots of widgets, badges and plugins which allow you to display your latest Flickr photos on your website, but we’ll take it a step further by tapping straight into Flickr and integrating your photostream into your website, giving you a photo gallery that is a breeze to update.