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IAM Backup is package made of two classes. One performs the backup of the selected MySQL database, and the second restores the database. Both classes support gzip-compressed files for improved performance. When performing the backup, the user is prompted to download the backup file, straight from the browser. Alternatively, the backup can be stored on the local server at a predefined location. Restoring the database (or copying it to another server) is just as easy. This class is featured on PHPClasses.org and Freshmeat

This class is licensed under the GNU Lesser General Public License (LGPL), so feel free to use it, modify it as you want, although a little credit is always welcome. Get the full IAM Backup Source Code and Documentation here
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This class takes the results of a SQL query and outputs in the CSV (comma separated values) format in only 2 lines of code. This comes very handy when exporting data since CSV is a format that can be readily read by Excel and many other applications. You can even use it for Word’s Mail Merge!

The class offers the choice of sending the output to the browser or downloading it as a file. The name and extension of the dump file are defined by the developer.

This class is licensed under the GNU Lesser General Public License (LGPL), so feel free to use it, modify it as you want, although a little credit is always welcome. This class is featured on PHPClasses and Freshmeat. Get the Source code: Click here

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This class can be used to display calendar of a given month in an HTML page. Holidays or other events can be configured to be highlighted in a special way (using CSS styles). The days of the month can rendered with a form checkbox or radio buttons so they can be selected by the user.

Rendering of the different calendar elements can be configured using CSS styles. The names of the months and days of the week can be configured, so that they’re displayed in a language other than English. See this class at PHPClasses.org and Freshmeat

This class is licensed under the GNU Lesser General Public License (LGPL), so feel free to use it, modify it as you want, although a little credit is always welcome. Get the Source Code and Documentation.
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IAM-XLS is a PHP class for generating an XLS file. Alternatively, it can be used for performing a query dump and sending it to the browser as an Excel File. It allows the user to enter text and numeric values into a Excel spreadsheet. It has browser and OS detection capabilities for appropriate handling of downloads (content-type, etc.).

This class is licensed under the GNU Lesser General Public License (LGPL), so feel free to use it, modify it as you want, although a little credit is always welcome. This class is feature in PHPClasses.org and Freshmeat. Get the Source Code and Documentation

RSS (which, in its latest format, stands for “Really Simple Syndication”) is a family of web feed formats used to publish frequently updated content such as blog entries, news headlines or podcasts. An RSS document, which is called a “feed,” “web feed,” or “channel,” contains either a summary of content from an associated web site or the full text. RSS makes it possible for people to keep up with their favorite web sites in an automated manner that’s easier than checking them manually.

Many applications make use of the information contained in RSS feeds. One of the challenges associated with this “site feed scraping” is being able to find the URLs of the feeds in webpages. That’s why, after a little research and a little coding, we came up with a PHP class that does just that. When passed a URL, it will return all the RSS feed URLs that appear on that page. It will even make those links absolute in case the links it finds are relative ones. The class only needs one thing to get working. The URL of the page you want to scan for RSS feeds. This URL is also used to resolve relative RSS links.

Behind the scenes, the class performs three main steps. First, the cURL library is used to fetch the content pointed to by the URL the user passed.. Second, since PHP doesn’t have an SGML parser built in like Python seems to, so getting all the <link> tags has to be done manually. A few regular expressions and some simple string splitting made it all real easy. Last but not least, the function goes through all the links found, figures out which ones belong to RSS feeds, resolves them to absolutes URL if necessary, and stores them on an array, making sure the link isn’t already listed to prevent duplicate links (e.g., the RSS appears more than once in the page).

All this is done behind the scenes, so that the users of this class are abstracted from all this complexities. Currently, this class only looks for feeds in <link> tags, so if a page has an <a> tag linking to a feed, the class won’t be able to find it. This is not too big a problem, though, as most sites use <link> tags for their feeds, so that search engines can easily find them.

You can download the code for this class here. The ZIP package contains the fully documented class source code, as well as a simple example to illustrate how to use the class. This class is featured in Freshmeat.