print_o

January 14, 2026 · View on GitHub

An object graph visualizer for PHP

print_o visualizes PHP object graphs as interactive diagrams, making it easy to understand complex object relationships in your application.

Features

  • Visual representation of object relationships
  • Interactive graph with configurable properties
  • Support for different visualization ranges (objects only, with properties, or full details)

Quick Start

print_o($object);

object graph

What is object graph ?

Object-oriented applications contain complex webs of interrelated objects. Objects are linked to each other by one object either owning or containing another object or holding a reference to another object. This web of objects is called an object graph and it is the more abstract structure that can be used in discussing an application's state. - wikipedia

(JA) オブジェクト指向のアプリケーションは相互に関係のある複雑なオブジェクト網を含んでいます。オブジェクトはあるオブジェクトから所有されているか、他のオブジェクト（またはそのリファレンス）を含んでいるか、そのどちらかでお互いに接続されています。このオブジェクト網をオブジェクトグラフと呼びます。

Simple object graph

only object

With properties

+property

Full extract

+array

Requirements

  • PHP 5.4+

Installation

composer require --dev koriym/printo

Usage


print_o($object);

//or

use Koriym\Printo\Printo;

echo (new Printo($object))
    ->setRange(Printo::RANGE_PROPERTY)
    ->setLinkDistance(130)
    ->setCharge(-500);

Live demo