[PHP] Separate `host` into `host` and `basePath`

Description

Problem

swagger: "2.0"
info:
  title: TEST API
  version: ""
host: aaa.example.com
basePath: /private

$c = new Swagger\Client\Configuration();

$c->getHost();// string "http://aaa.example.com/private"

// `/private` WILL BE LOST...
$c->setHost('http://bbb.example.com');

$c->getHost();// string "http://bbb.example.com"

$api = new Swagger\Client\Api\TestApi(null, $c);
$api->getXXX();
// 404 Not Found

I'd like to improve Configuration as follows.

• new methods
  • Configuration::setBasePath()
  • Configuration::getBasePath()
  • Configuration::getBaseUrl()

/*
 * setter
 */
// Only the `host` is changed.
$c->setHost('http://bbb.example.com');
// If we want to change the `basePath`, like this.
$c->setBasePath('/public');

/*
 * getter
 */
$c->getHost();
// string "http://bbb.example.com"
$c->getBasePath();
// string "/public"
$c->getBaseUrl();
// string "http://bbb.example.com/public"

Swagger-codegen version

2.3.0

Please let me know what you think.
Thank you.

Start with the generated PHP client's Swagger\Client\Configuration class and trace how host and basePath from the Swagger definition are combined for TestApi requests. Implement the requested host, basePath, and baseUrl behavior, then verify that changing the host preserves the configured path and that requests no longer return 404.