If you are looking for a graph, math or geometry plugin for Cakephp, then Jpgraphs is a great option.
First, download Jpgraphs. Create a folder in your app/vendor directory called jpgraph and upload the contents of src folder into it.
In the controller you intend to use for your graph create a method / action and call it graphy. Include $this->autoRender = false in your action to prevent direct viewing
public function graphy()
$this->autoRender = false;
// Some data
$ydata = array(11,3,8,12,5,1,9,13,5,7);
// Create the graph. These two calls are always required
$graph = new Graph(350,250);
// Create the linear plot
// Add the plot to the graph
// Display the graph
In the view add the following:
<?php echo $this->Html->image(array('controller' => 'contacts', 'action' => 'graphy'),array('id' => 'captcha_image'));?>
You should see a graph. If you do not, then check your php.ini file to see if GD is enabled.