[php] fix documentation of API authorization in README files (#15306)

fix hierarchy level + align wording across generators

Author: tiffmaelite

modules/openapi-generator/src/main/resources/php-symfony/README.mustache

@@ -147,9 +147,10 @@ Class | Method | HTTP request | Description
 
 ## Documentation For Authorization
 
-{{^authMethods}} All endpoints do not require authorization.
-{{/authMethods}}{{#authMethods}}{{#last}} Authentication schemes defined for the API:{{/last}}{{/authMethods}}
-{{#authMethods}}## {{{name}}}
+{{^authMethods}}Endpoints do not require authorization.{{/authMethods}}
+{{#hasAuthMethods}}Authentication schemes defined for the API:{{/hasAuthMethods}}
+{{#authMethods}}
+### {{{name}}}
 
 {{#isApiKey}}- **Type**: API key
 - **API key parameter name**: {{{keyParamName}}}

modules/openapi-generator/src/main/resources/php/README.mustache

@@ -86,11 +86,9 @@ Class | Method | HTTP request | Description
 {{/models}}
 
 ## Authorization
-{{^authMethods}}
-All endpoints do not require authorization.
-{{/authMethods}}
+{{^authMethods}}Endpoints do not require authorization.{{/authMethods}}
+{{#hasAuthMethods}}Authentication schemes defined for the API:{{/hasAuthMethods}}
 {{#authMethods}}
-{{#last}} Authentication schemes defined for the API:{{/last}}
 ### {{{name}}}
 {{#isApiKey}}
 

samples/client/petstore/php/OpenAPIClient-php/README.md

@@ -167,6 +167,7 @@ Class | Method | HTTP request | Description
 
 ## Authorization
 
+Authentication schemes defined for the API:
 ### petstore_auth
 
 - **Type**: `OAuth`
@@ -176,33 +177,28 @@ Class | Method | HTTP request | Description
     - **write:pets**: modify pets in your account
     - **read:pets**: read your pets
 
-
 ### api_key
 
 - **Type**: API key
 - **API key parameter name**: api_key
 - **Location**: HTTP header
 
 
-
 ### api_key_query
 
 - **Type**: API key
 - **API key parameter name**: api_key_query
 - **Location**: URL query string
 
 
-
 ### http_basic_test
 
 - **Type**: HTTP basic authentication
 
-
 ### bearer_test
 
 - **Type**: Bearer authentication (JWT)
 
-
 ### http_signature_test
 
 ## Tests

samples/server/petstore/php-symfony/SymfonyBundle-php/README.md

@@ -153,7 +153,8 @@ Class | Method | HTTP request | Description
 ## Documentation For Authorization
 
 
-## petstore_auth
+Authentication schemes defined for the API:
+### petstore_auth
 
 - **Type**: OAuth
 - **Flow**: implicit
@@ -162,7 +163,7 @@ Class | Method | HTTP request | Description
  - **write:pets**: modify pets in your account
  - **read:pets**: read your pets
 
-## api_key
+### api_key
 
 - **Type**: API key
 - **API key parameter name**: api_key