Awesome

php-class-diagram

A CLI tool that parses the PHP source directory and generates PlantUML class diagram scripts as output.

Features

♻️ Generating class diagrams from source code contributes to continuous design improvement.
🔖 It produces expressive class diagrams with a focus on namespaces and relationships.
🌐 Diagrams are interactive hypermedia tools, allowing you to click on class boxes to navigate directly to the source code, enhancing understanding both visually and interactively.
🔧 This simple CLI tool is easy to use.
💡 Additionally, it can generate a package relationship diagram to visualize dependencies on external namespaces.

What is PlantUML

PlantUML - Wikipedia PlantUML is an open-source tool allowing users to create diagrams from a plain text language. Besides various UML diagrams, PlantUML has support for various other software development related formats (such as Archimate, Block diagram, BPMN, C4, Computer network diagram, ERD, Gantt chart, Mind map, and WBD), as well as visualisation of JSON and YAML files.

Hypermedia Feature

One of the standout features of this tool is the ability to generate class diagrams with clickable links that navigate directly to the source code of those classes. This transforms the diagrams into interactive hypermedia tools, enhancing the understanding of the source code visually and interactively.

To enable this feature, generate the diagrams in SVG format and use the --svg-topurl option to specify the base URL for the links:

$ vendor/bin/php-class-diagram \
    --svg-topurl='https://github.com/your-username/your-repo/blob/main/path/to/source' \
    path/to/php/files

To embed the SVG diagrams in HTML while preserving the clickable links, use the embed or object tags instead of img. Here’s an example:

<html lang="en">
<head>
    <title>PHP Class Diagram</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        embed {
            max-width: 100%;
            max-height: 200%;
            width: auto;
            height: auto;
        }
    </style>
</head>
<body>
    <embed type="image/svg+xml" src="php-class-diagram.svg"/>
</body>
</html>

This ensures that the SVG image is responsive and the hyperlinks remain functional.

Hypermedia example

Dogfooding

php-class-diagram class diagram (linked SVG file)

php-class-diagram class diagram without fields and methods

If your analysis primarily focuses on the relationships between classes, a simpler notation may be more appropriate.

dogfood class diagram image.

php-class-diagram package related diagram

Visualizing package relationships can uncover critical design issues.

dogfood package related diagram image.

Install

From DockerHub

You can utilize a Docker image that includes php-class-diagram and PlantUML from the following URL.

https://hub.docker.com/r/smeghead7/php-class-diagram

From Composer

$ mkdir example
$ cd example
$ composer init
$ composer require --dev smeghead/php-class-diagram

Now, you can execute ./vendor/bin/php-class-diagram. For instance, try to display help message.

$ vendor/bin/php-class-diagram --help
usage: php-class-diagram [OPTIONS] <target php source directory>

A CLI tool that parses the PHP source directory and generates PlantUML class diagram scripts as output.

OPTIONS
  -h, --help                       show this help page.
  -v, --version                    show version.
      --class-diagram              output class diagram script. (default)
      --package-diagram            output package diagram script.
      --division-diagram           output division diagram script.
      --jig-diagram                output class diagram and package diagram script.
      --enable-class-properties    describe properties in class diagram. (default)
      --disable-class-properties   not describe properties in class diagram.
      --enable-class-methods       describe methods in class diagram. (default)
      --disable-class-methods      not describe methods in class diagram.
      --enable-class-name-summary  describe classname with Class summary of document comment. (default)
      --disable-class-name-summary describe classname without Class summary of document comment.
      --hide-private               hide private properties and methods.
      --hide-private-properties    hide private properties.
      --hide-private-methods       hide private methods.
      --svg-topurl='url'           Specifies the top URL when displaying the class as a link when outputting in SVG format.
      --header='header string'     additional header string. You can specify multiple header values.
      --include='wildcard'         include target file pattern. (default: `*.php`) You can specify multiple include patterns.
      --exclude='wildcard'         exclude target file pattern. You can specify multiple exclude patterns.
      --rel-target-from='clases'   comma separated list of classes to filter dependencies from
      --rel-target-to='classes'    comma separated list of classes to filter dependencies to
      --rel-target='classes'       comma separated list of classes to filter dependencies from or to. this option overrides
                                   --rel-target-from and --rel-target-to if set.
      --rel-target-depth=integer   max depth of dependencies to show when using --from or --to filters

How to execute

Class Diagram

If there are three PHP source files in the directory test/fixtures/no-namespace each with a TYPE comment,

php source files.

└─test
    └─fixtures
        └─no-namespace
            └─product
                    Product.php
                    Name.php
                    Price.php

Product.php

<?php
class Product {
    /** @var Name   product name. */
    private $name;
    /** @var Price  price of product. */
    private $price;
}

Name.php

<?php
class Name {
    /** @var string  name. */
    private $name;
}

Price.php

<?php
class Price {
    /** @var int  price. */
    private int $price;
}

Executing php-class-diagram will output the PlantUML script.

$ vendor/bin/php-class-diagram test/fixtures/no-namespace
@startuml class-diagram
  package product as product {
    class "Price" as product_Price {
      -price : int
    }
    class "Name" as product_Name {
      -name : string
    }
    class "Product" as product_Product {
      -name : Name
      -price : Price
      +method1(param1)
    }
  }
  product_Product ..> product_Name
  product_Product ..> product_Price
  product_Product ..> product_Product
@enduml

Use PlantUML to convert the PlantUML script to an image.

PlantUML output image.

option `header`

You can specify the string to be output to the PlantUML header.

$ vendor/bin/php-class-diagram \
    --header='title "This is the class diagram"' \
    path/to/src

option `include`

You can add patterns to specify the target files for processing.

$ vendor/bin/php-class-diagram \
    --include='*.php' \
    --include='*.php4' \
    path/to/src

option `exclude`

You can specify patterns to exclude files from the processing. If you want to ignore a folder, you must specify the relative path to the target php source directory.

$ vendor/bin/php-class-diagram \
    --exclude='test' \
    --exclude='*Exception.php' \
    path/to/src

option `rel-target`

If there are a very large number of target classes, the class diagram will be cumbersome and difficult to understand. In such a case, you can specify the classes you want to study in the --rel-target field to generate a class diagram for only the related classes. By using --rel-target-from and --rel-target-to, it is also possible to further narrow down the list according to the direction of dependencies.

$ vendor/bin/php-class-diagram \
    --rel-target=Entry \
    --rel-target-depth=3 \
    path/to/src

$ vendor/bin/php-class-diagram \
    --rel-target-from=Entry \
    --rel-target-depth=3 \
    path/to/src

Package Diagram

You can visualize package dependencies by creating a package relationship diagram using php-class-diagram.

$ vendor/bin/php-class-diagram --package-diagram test/fixtures/dependency-loops
@startuml package-related-diagram
  package hoge.fuga as ROOT {
    package product as product {
      package attribute as product.attribute {
      }
      package config as product.config {
      }
    }
  }
  product --> product.attribute
  product <-[#red,plain,thickness=4]-> product.config
@enduml

Packages that depend on each other are undesirable. If the tool detects such dependencies, it will issue a warning with a thick red line.

PlantUML output image.

Division Diagram

If you are utilizing the Enum feature introduced in PHP 8.1, you can generate the division diagram. Visualizing the divisions employed in the program can be beneficial for research and design purposes.

$ bin/php-class-diagram --division-diagram test/fixtures/enum/ 
@startuml division-diagram
  card Suit #ccffcc [
    Suit
    <b>スート</b>
    ====
    Hearts
    <b>ハート</b>
    ----
    Diamonds
    <b>ダイヤ</b>
    ----
    Clubs
    <b>クローバー</b>
    ----
    Spades
    <b>スペード</b>
  ]
  package Sub as Sub {
    card Status #ffcccc [
      Status
      <b>ゲームのステータス</b>
      ====
      Player
      <b>プレイヤーのターン</b>
      ----
      Computer
      <b>コンピュータのターン</b>
      ----
      GameSet
      <b>ゲーム終了</b>
    ]
    card MyExceptionCase #ccccff [
      MyExceptionCase
      ====
      InvalidMethod
      ----
      InvalidProperty
      ----
      Timeout
    ]
    card Size #ccffff [
      Size
      ====
      Small
      ----
      Medium
      ----
      Large
    ]
  }
@enduml

PlantUML output image.

GitHub Actions support

The following repository provides actions for generating class diagrams using php-class-diagram in GitHub Actions workflows.

smeghead/php-class-diagram-gh-action

Development

Open shell

docker compose build
docker compose run --rm php_cli bash

install dependencies

composer install

execute tests

composer test

CONTRIBUTING

Both Issues and Pull Requests are welcome!

Awesome

php-class-diagram

Features

What is PlantUML

Hypermedia Feature

Dogfooding

php-class-diagram class diagram (linked SVG file)

php-class-diagram class diagram without fields and methods

php-class-diagram package related diagram

Install

From DockerHub

From Composer

How to execute

Class Diagram

option header

option include

option exclude

option rel-target

Package Diagram

Division Diagram

GitHub Actions support

Development

Open shell

install dependencies

execute tests

CONTRIBUTING

option `header`

option `include`

option `exclude`

option `rel-target`