What's the advantage of technology POST BODY, unlike the normal POST?

Our Android developer says, it would be easier to send POST requests in the form of a BODY, not as a variable key.

Get the query as: file_get_contents('php://input');
But I get the raw data and he needs a string to parse on the value of the key.

When I get data through POST in the usual way, the data get through the key $_POST["key"] and not worried.

Question two:
1. What are the advantages of data transmission by method POST through the BODY ? Is there any sense to bother? Android developer says so it is easier to transfer data than using the value key
2. If we Tinker with this technology, there are methods to parse a string into value is key when it comes to this big string:
"json":{"data":"12","data2":"13"}, "user":{"user_id":"12"}

Thanks in advance to all the answers!
July 9th 19 at 13:55
2 answers
July 9th 19 at 13:57
What is this mysterious acronym - BODY?
Only the transmission of data in the body of a POST request in JSON instead of url encoded?

"What are the benefits of data transmission method"
JSON the main advantage of nested structures (or structures that have not yet invested, but in the process of finalizing functionality may become so), in other cases it will slow down, since the extra bytes in the query + parsing.

"is there methods to parse a string into value-Luce"
Means for parsing JSON in almost any programming language already.
Yes, I added at the beginning and end {} and it was the most normal JSON. :) and then parse the very simple already... - eldon_Denesik commented on July 9th 19 at 14:00
July 9th 19 at 13:59
......
one question, where do you keep the model ?
What models? - eldon_Denesik commented on July 9th 19 at 14:02
: the layer model ... well, there, users, roles... even something that you have, and it is, no wonder that you are sending json object - eldon_Denesik commented on July 9th 19 at 14:05

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