Graphing Tutorials - Data Interface Script


Data Interface Script

This tutorial shows how to create a dynamic data interface script. The script can be written in any server side language and designed to connect to virtually any data source.

For the purposes of this tutorial we will be using PHP and connecting to MySQL database. At runtime the graphing software will make a URL call to the interface script which in turn will return the data.


The following tutorials assume you have already downloaded and installed the
PHP Advanced Graphs and Charts package.

The latest release can be downloaded here

Directory Structure

In this tutorial you will be create a web page and a couple of configuration files. For the purposes of this tutorial you should create a directory /graphtest/ directory under your web root directory.

This tutorial also assumes that you installed the graphing software directly under the web root
(e.g. /webRootFilePath/jpowered/graph/ )

Step 1 - Create a test MySQL Database

For the purpose of this tutorial the following MySQL database should be created.-

Now add the following data to the 'sales' table:-

Step 2 - Create a Custom Data Interface Script

Create a file named dataInterface.php which contains the following:-

Replace [USER] and [PASSWORD] with valid logon details for your MySQL server.

Place the file on your web server in a directory /graphtest/ under your web root directory

Note: The above assumes that your MySQL server is running on the same machine as your Web Server. If this is not the case then you will need to replace "localhost:3306" with the correct route to your MySQL server.

Step 3 - Create the config file

Create a file named 'config.txt' and add the following contents to it. This file should then be placed in the /graphtest/ directory.

Note: This config.txt file contains the parameters which determine certain aspects of the graph like colors and fonts. For the function and options of each parameter see the following page:-
Graph Parameters »

Step 4 - Create a web page and add the Graph to it

Add this HTML code to your page (replacing [] with the actual domain of your web site and [URL FilePath] with the url of the web directory where your page resides)

Save the web page and load it up to your web server placing it in the /graphtest/ directory.

Final Step - View the page in a browser

Open your web browser and view the page. You should see a Stacked Vertical Cylinder Graph with 6 bars plotted.





Adding Graphs to Web Pages

Direct DB Access to MySQL DBs

Custom Data Function

Interface Scripts

Constructing configuration dynamically

Creating Date/Time Axis Labels

Graphing Data Directly from Spreadsheets



Demo Index

Troubleshooting Guide



Configuration Options and Parameters

Supplying the Graph with Data

Sample Image Tags

Database Connections

Database Information method

Custom Data Function

Installation Help

Upgrade PHP

Upgrade GD

Log File

Allow URL Fopen