If you want to send JSON, you need to send JSON. This means not using jQuery.serialize() but JSON.stringify(). I recommend that you find out why you want to send JSON first before trying it out. Then I recommend you actually learn about how to use JSON on both sides of the communication, and how to make sure that you are sending what you think you want to send.

I won't write any code for you, as Google is aplenty with examples. For example this question from two years ago seems to be very close to your problem.

But your problem seems to mainly be on the Javascript side of things, which is not very close to the topic of this site.

In reply to Re^5: Read JSON data from a form by Corion
in thread Read JSON data from a form by Anonymous Monk

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