Either download the free library from http://jpgraph.net/download/ or use your license information and download the pro-version from http://jpgraph.net/pro/login.php. The download is just a packed zip (or tar.gz) of php files. There are no automatic installation scripts.

Unpack the library where you normally store PHP libraries. This should be in your PHP include path. When you unpack the library it will be named "jpgraph-3.x" (where x corresponds to the version you have downloaded).

Now either rename the unpacked the directory to just jpgraph or if the system us Unix based create a soft symbolic link, for example

ln -s jpgraph-2.x jpgraph

This will allow you to access the library files in your own program for with a require_once('jpgraph/jpgraph.php')

Make sure that the GD extension is enabled in your php.ini file (check the output from phpinfo() )

[Optional] Verify that the paths defined in jpg-config.inc.php corresponds to the server setup. The path to your TTF fonts must be correct. If you get an error saying that some TTF fonts cannot be found or read then the path needs to be adjusted in this configuration file.

[Optional] Check that you have sufficient memory and execution time set in your php.ini file. It is recommended to allow at least 32Mb memory for PHP if you intend to run anything else than very basic graph scripts.

[Optional] To allow for better debugging in conjunction with graph scripts the output buffering should also be disabled in php.ini

[Optional] To avoid warning messages it might be necessary to set the default timezone in php.ini if this has not already been done. Starting with PHP 5.2 a warning is generated if the timezone for PHP is not set.