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[Utility & Helpers](/categories/utility) 4. / 5. florianwolters/component-util-observer ActiveLibrary[Utility & Helpers](/categories/utility) florianwolters/component-util-observer ====================================== The Observer behavioural design pattern as a PHP component. 07PHP Since Mar 6Pushed 13y ago1 watchersCompare [ Source](https://github.com/FlorianWolters/PHP-Component-Util-Observer)[ Packagist](https://packagist.org/packages/florianwolters/component-util-observer)[ RSS](/packages/florianwolters-component-util-observer/feed)WikiDiscussions master Synced 4w ago READMEChangelogDependenciesVersions (1)Used By (0) FlorianWolters\\Component\\Util\\Observer ========================================= [](#florianwolterscomponentutilobserver) [![Build Status](https://camo.githubusercontent.com/5cf6384870ae08a4934ddc48b44f4e4eed51e7f381e48924433969a1ea85e0a8/68747470733a2f2f7365637572652e7472617669732d63692e6f72672f466c6f7269616e576f6c746572732f5048502d436f6d706f6e656e742d5574696c2d4f627365727665722e706e673f6272616e63683d6d6173746572)](http://travis-ci.org/FlorianWolters/PHP-Component-Util-Observer) **FlorianWolters\\Component\\Util\\Observer** provides the *Observer* behavioural design pattern as a simple-to-use [PHP](http://php.net "PHP: Hypertext Preprocessor") component. Introduction ------------ [](#introduction) *Observer* is a *behavioural* design pattern and defined as follows: > "Sefine a one-to many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically." \-- E. Gamma, et al. Design Patterns: Elements of Reusable Object-Oriented software. Westford: Addison-Wesley, 1995. Features -------- [](#features) - Artifacts tested with both static and dynamic test procedures: - Dynamic component tests (unit tests) implemented using [PHPUnit](http://phpunit.de "sebastianbergmann/phpunit · GitHub"). - Static code analysis performed using the following tools: - [PHP\_CodeSniffer](http://pear.php.net/package/PHP_CodeSniffer "PHP_CodeSniffer"): Style Checker - [PHP Mess Detector (PHPMD)](http://phpmd.org "PHPMD - PHP Mess Detector"): Code Analyzer - [phpcpd](https://github.com/sebastianbergmann/phpcpd "sebastianbergmann/phpcpd · GitHub"): Copy/Paste Detector (CPD) - [phpdcd](https://github.com/sebastianbergmann/phpdcd "sebastianbergmann/phpdcd · GitHub"): Dead Code Detector (DCD) - Installable via [Composer](http://getcomposer.org "Composer") or [PEAR installer](http://pear.php.net/manual/en/guide.users.commandline.cli.php "Manual :: Command line installer (PEAR)"): - Provides a [Packagist](http://packagist.org "Packagist") package which can be installed using the dependency manager [Composer](http://getcomposer.org "Composer"). - Click [here](http://packagist.org/packages/florianwolters/component-util-observer "florianwolters/component-util-observer - Packagist") for the package on [Packagist](http://packagist.org "Packagist"). - Provides a [PEAR package](http://pear.php.net/manual/en/guide.users.concepts.package.php "Manual :: PEAR Packages") which can be installed using the package manager [PEAR installer](http://pear.php.net/manual/en/guide.users.commandline.cli.php "Manual :: Command line installer (PEAR)"). - Click [here](http://pear.florianwolters.de "PEAR channel of Florian Wolters") for the [PEAR channel](http://pear.php.net/manual/en/guide.users.concepts.channel.php "Manual :: PEAR Channels"). - Provides a complete Application Programming Interface (API) documentation generated with the documentation generator [ApiGen](http://apigen.org "ApiGen | API documentation generator for PHP 5.3.+"). - Click [here](http://blog.florianwolters.de/PHP-Component-Util-Observer "FlorianWolters\Component\Util\Observer | Application Programming Interface (API) documentation") for the current API documentation. - Follows the [PSR-0](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md "PSR-0 requirements for autoloader interoperability") requirements for autoloader interoperability. - Follows the [PSR-1](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-1-basic-coding-standard.md "PSR-1 basic coding style guide") basic coding style guide. - Follows the [PSR-2](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md "PSR-2 coding style guide") coding style guide. - Follows the [Semantic Versioning](http://semver.org "Semantic Versioning") Specification (SemVer) 2.0.0-rc.1. Requirements ------------ [](#requirements) - [PHP](http://php.net "PHP: Hypertext Preprocessor") >=5.4 Installation ------------ [](#installation) ### Local Installation [](#local-installation) **FlorianWolters\\Component\\Util\\Observer** should be installed using the dependency manager [Composer](http://getcomposer.org "Composer"). [Composer](http://getcomposer.org "Composer") can be installed with [PHP](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md "PSR-0 requirements for autoloader interoperability"). ``` php -r "eval('?>'.file_get_contents('http://getcomposer.org/installer'));" ``` > This will just check a few [PHP](http://php.net "PHP: Hypertext Preprocessor") settings and then download `composer.phar` to your working directory. This file is the [Composer](http://getcomposer.org "Composer") binary. It is a PHAR ([PHP](http://php.net "PHP: Hypertext Preprocessor") archive), which is an archive format for [PHP](http://php.net "PHP: Hypertext Preprocessor") which can be run on the command line, amongst other things. > > Next, run the `install` command to resolve and download dependencies: ``` php composer.phar install ``` ### System-Wide Installation [](#system-wide-installation) **FlorianWolters\\Component\\Util\\Observer** should be installed using the [PEAR installer](http://pear.php.net/manual/en/guide.users.commandline.cli.php "Manual :: Command line installer (PEAR)"). This installer is the [PHP](http://php.net "PHP: Hypertext Preprocessor") community's de-facto standard for installing [PHP](http://php.net "PHP: Hypertext Preprocessor") components. ``` pear channel-discover pear.florianwolters.de pear install --alldeps fw/Observer ``` As A Dependency On Your Component --------------------------------- [](#as-a-dependency-on-your-component) ### Composer [](#composer) If you are creating a component that relies on **FlorianWolters\\Component\\Util\\Observer**, please make sure that you add **FlorianWolters\\Component\\Util\\Observer** to your component's `composer.json` file: ``` { "require": { "florianwolters/component-util-observer": "0.1.*" } } ``` ### PEAR [](#pear) If you are creating a component that relies on **FlorianWolters\\Component\\Util\\Observer**, please make sure that you add **FlorianWolters\\Component\\Util\\Observer** to your component's `package.xml` file: ``` Observer pear.florianwolters.de 0.1.0 0.1.99 ``` Usage ----- [](#usage) The best documentation for **FlorianWolters\\Component\\Util\\Observer** are the unit tests, which are shipped in the package. You will find them installed into your [PEAR](http://pear.php.net "PEAR - PHP Extension and Application Repository") repository, which on Linux systems is normally `/usr/share/php/test`. Development Environment ----------------------- [](#development-environment) If you want to patch or enhance this component, you will need to create a suitable development environment. The easiest way to do that is to install [phix4componentdev](https://github.com/stuartherbert/phix4componentdev "stuartherbert/phix4componentdev · GitHub"): ``` # phix4componentdev pear channel-discover pear.phix-project.org pear install phix/phix4componentdev ``` You can then clone the Git repository: ``` # PHP-Component-Util-Observer git clone http://github.com/FlorianWolters/PHP-Component-Util-Observer ``` Then, install a local copy of this component's dependencies to complete the development environment: ``` # build vendor/ folder phing build-vendor ``` To make life easier for you, common tasks (such as running unit tests, generating code review analytics, and creating the [PEAR package](http://pear.php.net/manual/en/guide.users.concepts.package.php "Manual :: PEAR Packages")) have been automated using [phing](http://phing.info "Phing"). You'll find the automated steps inside the `build.xml` file that ships with the component. Run the command `phing` in the component's top-level folder to see the full list of available automated tasks. License ------- [](#license) This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see . ### Health Score 20 — LowBetter than 13% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity4 Limited adoption so far Community7 Small or concentrated contributor base Maturity41 Maturing project, gaining track record Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Community Maintainers ![](https://www.gravatar.com/avatar/75dd7e42d69a87c4a0c68b4f29f5d223eb1f9a3f647abafa72da80d2a06d2442?d=identicon)[FlorianWolters](/maintainers/FlorianWolters) --- Top Contributors [![FlorianWolters](https://avatars.githubusercontent.com/u/1318837?v=4)](https://github.com/FlorianWolters "FlorianWolters (2 commits)") ### Embed Badge ![Health badge](/badges/florianwolters-component-util-observer/health.svg) ``` [![Health](https://phpackages.com/badges/florianwolters-component-util-observer/health.svg)](https://phpackages.com/packages/florianwolters-component-util-observer) ``` ### Alternatives [trafficcophp/bytebuffer Node.js inspired byte stream buffer for PHP. 33463.7k18](/packages/trafficcophp-bytebuffer)[synolia/sylius-gdpr-plugin Synolia sylius GDPR plugin. 21156.4k](/packages/synolia-sylius-gdpr-plugin)[latuconsinafr/3d-bin-packager PHP Library for 3D Bin Packing. 2865.8k](/packages/latuconsinafr-3d-bin-packager) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)