info/DesignPatternsPHP
1
0
Fork 0
mirror of https://github.com/DesignPatternsPHP/DesignPatternsPHP.git synced 2025-02-23 09:12:34 +01:00
Code Issues Projects Releases Wiki Activity
DesignPatternsPHP/Creational/Singleton/README.md
John Webb de431c5126 Added More pattern UMLs
2014-07-31 14:13:53 -05:00

651 B
Raw Blame History

Singleton

THIS IS CONSIDERED TO BE AN ANTI-PATTERN! FOR BETTER TESTABILITY AND MAINTAINABILITY USE DEPENDENCY INJECTION!

Purpose

To have only one instance of this object in the application that will handle all calls.

Examples

  • DB Connector
  • Logger (may also be a Multiton if there are many log files for several purposes)
  • Lock file for the application (there is only one in the filesystem ...)

Diagram

UML Diagram

Alt Singleton UML Diagram