Cookbook Single Class

use Bartlett\GraphUml\ClassDiagramBuilder;
use Bartlett\GraphUml\Generator\GraphVizGenerator;

use Graphp\Graph\Graph;
use Graphp\GraphViz\GraphViz;

$generator = new GraphVizGenerator(new GraphViz());
$graph = new Graph();
$builder = new ClassDiagramBuilder($generator, $graph);

$builder->createVertexClass(ClassDiagramBuilder::class);

// show UML diagram statements
echo $generator->createScript($graph);
// default format is PNG
echo $generator->createImageFile($graph) . ' file generated' . PHP_EOL;

NOTE: Without custom $options provided with ClassDiagramBuilder class constructor, all default values are used (see ClassDiagramBuilderInterface::OPTIONS_DEFAULTS)

Will output this graph statements.

And temporary png file generated look like :