Best chart libraries

Charts are an indispensable part of any data visualization work. People can grok visual representation of data easily than a textual variety. Today there are a huge number of free chart libraries available to display visualizations on websites. Below is a small list of  some of the libraries available for displaying charts using php.

pChart - a PHP class to build charts

pChart is a PHP class oriented framework designed to create aliased charts. Most of todays chart libraries have a cost, our project is intended to be free. Data can be retrieved from SQL queries, CSV files, or manually provided. This project is still under development and new features or fix are made every week.

Focus has been put on rendering quality introducing an aliasing algorithm to draw eye candy graphics. Rendering speed has been dramatically enhanced since the first version, we'll still continue optimising the code! 

JpGraph

 

JpGraph is an Object-Oriented Graph creating library for PHP >= 5.1 The library is completely written in PHP and ready to be used in any PHP scripts (both CGI/APXS/CLI versions of PHP are supported).

Libchart Simple PHP chart drawing library

Libchart is a free chart creation PHP library, that is easy to use. 

This new version features multiple datasets for horizontal, vertical bar charts and line charts. The API got a facelift so be sure to check the examples so you don't miss anything.

FusionCharts

FusionCharts helps you create great-looking animated and interactive Flash charts for your PHP applications. It provides you a complete reporting experience with features like drill-down, one-click chart export and full AJAX support. With an easy-to-use PHP API and lots of code samples, it makes chart generation a breeze, and needs no knowledge of Flash whatsoever. So no matter whether you are building reports, dashboards, polls, analytics or any other application, FusionCharts can add both meaning and glamor to your data....
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Advanced Graphs and Charts for PHP

Add Powerful reporting features to your Web / Intranet pages and applications. With advanced graphing you will be quickly adding impressive and dynamic charting capabilities bringing your data alive ! The PHP graphing scripts provide a very easy way to embed dynamically generated graphs and charts into PHP applications and HTML web pages.Very easy to use and add professional quality graphing to web pages / applications in minutes.
Many new chart styles added to the Extented Collection.