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Naming conventions for code released by PHP-FIG

  1. Interfaces MUST be suffixed by Interface: e.g. Psr\Foo\BarInterface.
  2. Abstract classes MUST be prefixed by Abstract: e.g. Psr\Foo\AbstractBar.
  3. Traits MUST be suffixed by Trait: e.g. Psr\Foo\BarTrait.
  4. PSR-0, 1 and 2 MUST be followed.
  5. The vendor namespace MUST be Psr.
  6. There MUST be a package/second-level namespace in relation with the PSR that covers the code.
  7. Composer package MUST be named psr/<package> e.g. psr/log. If they require an implementation as a virtual package it MUST be named psr/<package>-implementation and be required with a specific version like 1.0.0. Implementors of that PSR can then provide "psr/<package>-implementation": "1.0.0" in their package to satisfy that requirement. Specification changes via further PSRs should only lead to a new tag of the psr/<package> package, and an equal version bump of the implementation being required.
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