Creating a graph

To create a graph, instantiate a Graphviz\Digraph or a Graphviz\Graph object:

# Directed graph
$graph = new Graphviz\Digraph();

# Undirected graph
$graph = new Graphviz\Graph();

Those two objects are mostly identical, and methods documented in the next chapters are available for both objects.

Directed graph

A directed graph can be created by using the Graphviz\Digraph class when you instantiate your graph:

$graph = new Graphviz\Digraph();

$graph->set('rankdir', 'LR');
$graph->edge(['Alice', 'Bob', 'Charlie']);
$graph->edge(['Alice', 'Charlie']);

Undirected graph

An undirected graph can be created by using the Graphviz\Graph class when you instantiate your graph:

$graph = new Graphviz\Graph();

$graph->set('rankdir', 'LR');
$graph->edge(['Alice', 'Bob', 'Charlie']);
$graph->edge(['Alice', 'Charlie']);