pChart 2.1 library for PHP 7 (7-Compatible branch)

The good old pChart got an overhaul!

All examples work fine with zero code modifications to them
Code was beautified
Made minor improvements and added some speed ups

pChart 2.2

This version will NOT work with your existing code.
Please check the change log for the complete list of changes.

Major changes:

Code cleanup
Bootstrapped
Exceptions
Introduced pColor & pColorGradient
Moved functions around
Added support for compression and filters in PNG output
Cache: added PDO SQLite storage option
ImageMapper: JavaScript re-write using jQuery
ImageMapper: added PDO SQLite storage option
Removed DelayedLoader

pChart 2.3

Introduce pPyramid (in progress)
Introduce pQRCode (maybe)
More cleanup
Performace boost
Separated pBarcode
No more config files (palettes & barcode db)

The sandbox and all examples work as expected.
Code is being tested against PHP versions 7.0, 7.1, 7.2 & 7.3

Word of advice, keep it secure:

Set write permissions only to the "cache" and "temp" folders if you are going to be using them.
Make sure the content of these folders is not visible to the rest of the world.