Array to string Conversation

Hello @Teodor ,

I need to convert all values I post with form {{$ _POST}} to the following format. However, I have tried a few methods and could not reach the required result I ask for your help.

{{$_POST}}

{
    "locale": "tr",
    "conversationId": "123456789",
    "binNumber": "454671"
}

I have to convert to …

[locale=tr,conversationId=123456789,binNumber=454671]

do you have any idea ? or you can guide me ?