draw a dual y axis diagram using php
<p>I have a requirement where I have two y axis. Hence I want a bar chart for y-axis on left and a line diagram for y-axis on the right.</p>

<p><img src="http://i.stack.imgur.com/Z0AyO.jpg" alt="Example"></p>

<p>Can you help me locate the correct GPL PHP library for this ?</p>

<p>Thanks in advance.</p>

<p>Regards,
tvks</p>
