[PHP-client] int[] paramater types leads to errors

Description

When using the below mentioned generated client, some methods require int[] as type. However if i follow the generated documentation

it either gives me syntax error, unexpected '[', expecting ')' when i use

$ids = array(new \Swagger\Client\Model\int[]());

or it gives me Exception: Invalid resource type: array when i try something like this:

$ids = array(231431321,3231433141342);

From what i can see, an int[] class is not generated anywhere?

Edit 1:
array(231431321) works fine with codegen v 2.2.1

Swagger-codegen version

2.3.1 and 2.4.0_SNAPSHOT

Swagger declaration file content or url

https://esi.evetech.net/latest/swagger.json

Command line used for generation

java -jar $swagger generate -i https://esi.evetech.net/latest/swagger.json?datasource=tranquility -l php --git-repo-id "esi-php-client" --git-user-id "jbs1"  --release-note "$msg"

Suggest a fix/enhancement

Found a solution. this error seems to come from the GuzzleHttp client.
To fix it, the array, that is given to generated methods with int[] parameters, simply needs to be a json:

$ids = json_encode(array(new \Swagger\Client\Model\int[]()));

So just the generation for the documentation needs to be changed, to make it clear to encode the array.

Start with the generated documentation in docs/Api/UniverseApi.md, especially the POST universe names parameter example, and compare it with the PHP client behavior described in the issue. Update the example so array parameters are documented in the form the generated client accepts, then verify the corrected example against the referenced ESI Swagger definition and generated client.