PHP - Interfaces

php-interfaces.php

<?php
interface FileStorage {

  function save($filename, $contents);
  function readContents($filename);
}

class LocalDriveFileStorage implements FileStorage {

  function save($filename, $contents) {
    // Implement logic
  }
  function readContents($filename) {
    // Implement logic
  }
}

interface AWSService {
  function getRegion();
}

class S3FileStorage implements FileStorage, AWSService {

  function save($filename, $contents) {
    // Implement logic
  }
  function readContents($filename) {
    // Implement logic
  }
  function getRegion() {
    return 'us-east-1';
  }
}