Write a post request for php

Not quite clear question. But still try to answer.

1. To send requests to the server from the client (browser) are used:

   • FORM tag and input nested tags. More details about the forms: http://htmlbook.ru/samhtml5/formy/otpravka-dannykh-formy
   • or jQuery library in which technology is provided AJAX. Details: http://api.jquery.com/jquery.ajax/
   • or javascript language also allowing the use of AJAX. Details: https://learn.javascript.ru/ajax

2. In order to display the answer to the request in the browser it is used:

   • server programming in PHP or any other server language;
   • or if you want to accept and process the received data on the client (in the browser), use the AJAX technology provided in the jQuery library
   • or javascript language. Details: https://learn.javascript.ru/ajax

3. To convert a java script object on the client side to the JSON format and vice versa, the following methods are used:

   • JSON.parse - reads objects from a string in JSON format.
   • JSON.stringify - turns objects into a string in JSON format, used when you need to transfer data via JavaScript over a network.

More details: https://learn.javascript.ru/json

4. To convert a JSON object to a PHP variable and vice versa, the following functions are used on the server side:
   • json_decode - Decodes a JSON string
   • json_encode - Returns the JSON representation of the data.

More details: http://php.net/manual/ru/ref.json.php