[PHP] Fix code example in README

Description

This change accidentally broke code example in README https://github.com/swagger-api/swagger-codegen/commit/9ca9887de471fb82488592298e5e3e544f278aa7#diff-48c9b5ad08e2cc9e563b3ac9da839117

When using a Basic auth we get code example with non-working code. $config variable is missing and you will get fatal error because of applying ->setUsername('YOUR_USERNAME') to non-variable.

Swagger-codegen version

2.3.1

Swagger declaration file content or url

{
  "swagger" : "2.0",
  "host": "example.com",
  "schemes": [
    "https"
  ],
  "securityDefinitions": {
    "basicAuth": {
      "type": "basic"
    }
  },
  "security": [
    {"basicAuth": []}
  ],

  "paths" : {
    "/users/v3/orders" : {
      "post" : {
        "summary" : "Create a new order",
        "description" : "To create a new order simply provide a JSON object with the applicable properties",
        "operationId" : "createOrder",
        "consumes" : [ "application/json" ],
        "produces" : [ "application/json" ],
        "parameters" : [ {
          "in" : "body",
          "name" : "body",
          "required" : false,
          "schema" : {
            "$ref" : "#/definitions/order"
          }
        } ],
        "responses" : {
          "200" : {
            "description" : "successful operation",
            "schema" : {
              "$ref" : "#/definitions/order"
            }
          },
          "400" : {
            "description" : "We were unable to create an order with the provided data. Some field constraint was violated."
          },
          "401" : {
            "description" : "You were not authorized to execute this operation."
          }
        },
        "x-400" : {
          "error_text" : "array|Bad value: order_amount|Bad value: order_tax_amount|Bad value: locale",
          "correlation_id" : "1b4c6bfa-f182-43dd-bde0-6bec32as6cf0",
          "error_code" : "BAD_VALUE"
        }
      }
    }
  },
  "definitions" : {
    
    "order_line" : {
      "type" : "object",
      "required" : [ "name", "quantity", "total_amount", "unit_price" ],
      "properties" : {
        "type" : {
          "type" : "string",
          "example" : "physical",
          "position" : 1,
          "description" : "Order line type. Possible values:<ul><li><em>physical</em></li><li><em>discount</em></li><li><em>shipping_fee</em></li><li><em>sales_tax</em></li><li><em>digital</em></li><li><em>gift_card</em></li><li><em>store_credit</em></li><li><em>surcharge</em></li></ul>"
        },
        "reference" : {
          "type" : "string",
          "example" : "19-402-USA",
          "position" : 2,
          "description" : "Article number, SKU or similar.",
          "minLength" : 0,
          "maxLength" : 64
        },
        "name" : {
          "type" : "string",
          "example" : "Red T-Shirt",
          "position" : 3,
          "description" : "Descriptive item name.",
          "minLength" : 1,
          "maxLength" : 255
        },
        "quantity" : {
          "type" : "integer",
          "format" : "int64",
          "example" : 5,
          "position" : 4,
          "description" : "Non-negative. The item quantity.",
          "minimum" : 0.0
        },
        "quantity_unit" : {
          "type" : "string",
          "example" : "pcs",
          "position" : 5,
          "description" : "Unit used to describe the quantity, e.g. kg, pcs... If defined has to be 1-8 characters"
        },
        "unit_price" : {
          "type" : "integer",
          "format" : "int64",
          "example" : 10000,
          "position" : 6,
          "description" : "Minor units. Includes tax, excludes discount. (max value: 100000000)",
          "maximum" : 1.0E8
        },
        "total_amount" : {
          "type" : "integer",
          "format" : "int64",
          "example" : 50000,
          "position" : 8,
          "description" : "Includes tax and discount. Must match (quantity \\* unit_price) - total_discount_amount within ±quantity. (max value: 100000000)",
          "maximum" : 1.0E8
        },
        "product_url" : {
          "type" : "string",
          "example" : "https://www.example.com/products/f2a8d7e34",
          "position" : 12,
          "description" : "URL to the product page that can be later embedded in communications between Klarna and the customer. (max 1024 characters)",
          "minLength" : 0,
          "maxLength" : 1024
        },
        "image_url" : {
          "type" : "string",
          "example" : "https://www.example.com/logo.png",
          "position" : 13,
          "description" : "URL to an image that can be later embedded in communications between Klarna and the customer. (max 1024 characters)",
          "minLength" : 0,
          "maxLength" : 1024
        }
      }
    },
    "order" : {
      "type" : "object",
      "required" : ["order_amount", "order_lines"],
      "properties" : {
        "order_id" : {
          "type" : "string",
          "example" : "f3392f8b-6116-4073-ab96-e330819e2c07",
          "position" : 1,
          "description" : "The unique order ID (max 255 characters).",
          "readOnly" : true
        },
        "name" : {
          "type" : "string",
          "example" : "Women's Fashion",
          "position" : 2,
          "description" : "The merchant name (max 255 characters).",
          "readOnly" : true
        },
        "status" : {
          "type" : "string",
          "example" : "CHECKOUT_INCOMPLETE",
          "position" : 3,
          "description" : "The current status of the order.",
          "readOnly" : true
        },
        "billing_address" : {
          "type" : "string",
          "example" : "Germany, Berlin",
          "position" : 4,
          "description" : "Customer address"
        },
        "shipping_address" : {
          "type" : "string",
          "example" : "Germany, Berlin",
          "position" : 5,
          "description" : "Customer address"
        },
        "order_amount" : {
          "type" : "integer",
          "format" : "int64",
          "example" : 50000,
          "position" : 6,
          "description" : "Non-negative, minor units. Total amount of the order, including tax and any discounts.",
          "minimum" : 0.0
        },
        "order_lines" : {
          "type" : "array",
          "position" : 7,
          "description" : "The applicable order lines (max 1000)",
          "items" : {
            "$ref" : "#/definitions/order_line"
          },
          "maxItems" : 1000,
          "minItems" : 0
        },
        "started_at" : {
          "type" : "string",
          "format" : "date-time",
          "position" : 8,
          "description" : "ISO 8601 datetime. When the merchant created the order.",
          "readOnly" : true
        },
        "completed_at" : {
          "type" : "string",
          "format" : "date-time",
          "position" : 9,
          "description" : "ISO 8601 datetime. When the customer completed the order.",
          "readOnly" : true
        },
        "last_modified_at" : {
          "type" : "string",
          "format" : "date-time",
          "position" : 10,
          "description" : "ISO 8601 datetime. When the order was last modified.",
          "readOnly" : true
        }
      }
    }
  }
}

Command line used for generation

swagger-codegen generate -i manifest.json -c config.json -l php -o sdk

Steps to reproduce

Nothing special. Just generate code using Basic auth description in manifest.

Related issues/PRs

https://github.com/swagger-api/swagger-codegen/pull/7777

Suggest a fix/enhancement

NA

Open the README and inspect the PHP Basic-auth example associated with commit 9ca9887de471fb82488592298e5e3e544f278aa7. Reproduce generation with the supplied manifest and command, then verify that the example defines $config before calling setUsername; completion means the generated README example no longer raises the reported fatal error.