swagger-codegen or openapi-generator PHP version - php

Question

The actual question: is it possible to choose the PHP version (5.6, 7.1, 7.2, ...) to generate code?
I got a swagger.json from https://api.otto.market/docs
which should be an openapi.json or so, since the file contains "openapi": "3.0.3",. Anyway ...
What i found out so far is that they (swagger and openapi-generator) seem to have templates for the code generation.
And those templates are written in the language for the version in use.
F.e. this (openapitools/openapi-generator-cli)
docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate \
-i /local/path/to/swagger.json \
-g php \
-o /local/path/to/generated/code/
creates a composer.json with
...
"require": {
"php": "^7.3 || ^8.0",
...
},
...
I now COULD use the templates and change the requirements.
But i think this would not be the target of a code generator.
Info about templates added to bottom.
What i guess is that there should be templates written for other PHP version.
But how would i choose them?
Are there any?
Swagger: as i read swagger came first, and openapi-generator is a fork.
So i tried swagger:
docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli generate \
-i /local/path/to/swagger.json \
-l php \
-o /local/path/to/generated/code/
Swagger created code for PHP 5.5 (as of the generated composer.json).
But it brings warnings and the generated code looks "broken".
I actually do not wonder since the file is made for openapi": "3.0.3.
But what i see is: swagger has templates for PHP 5.5.
My personal current conclusion:
I can generate code real quick f.e. for an API that i do not really (have to) know.
But how does it help me if i cannot change the language version?
F.e. i need an API client in 2 projects.
One is in PHP 7.1 and the other one in 7.3. How do i solve this?
Anybody had to deal with this? Or any ideas?
INFO
templates: how to use templates:
Call docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli author template -g php -o /local/templates/
to save all templates to path templates/.
You then can f.e. copy the composer.mustache to f.e. deploy/templates/ and change it.
On generating code you use -t /local/deploy/templates to use your changed template.
Example:
docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate \
-i /local/path/to/swagger.json \
-g php \
-o /local/path/to/generated/code/ \
-t /local/deploy/templates

Answer 1

Old versions of OpenAPI Generator (e.g. 3.0.0, 4.0.0) support old PHP versions.
To easily switch between OpenAPI Generator CLI versions, you may want to use the NPM CLI wrapper for OpenAPI Generator.