PHP handles json data from Python's Post

I recently used Python to process some json data, but encountered some problems during the process, so I recorded them.
1. Python Post json format data to the server: I checked some information, most of which are like this:

__author__ = 'jiezhi'

import urllib
import urllib2

data = {'name': 'jiezhi', 'age': '24'}
ret = urllib2.urlopen(url='http://jiezhiblog.com/test.php', data=urllib.urlencode(data))
print ret.read()

However, when it comes to php, it is often of array type. After several twists and turns, I changed to the following code:

__author__ = 'jiezhi'

import urllib2
import json

data = {'name': 'jiezhi', 'age': '24'}
ret = urllib2.urlopen(url='http://jiezhiblog.com/test.php', data=json.dumps(data))
print ret.read()

2. Problem on the PHP side
I used the modified Python code, but found that $_POST did not get the data, so I used file_get_contents(" php://input") to obtain the submitted data:

<?php
    $input = file_get_contents("php://input");
    var_dump($input);
    if ($input){
        print_r($input);
        $arr = json_decode($input,true);
        echo "arr";
        print_r($arr);
    }
?>

The submitted data can be obtained correctly at this time. Initial address: http://jiezhiblog.com/archives/366

The above introduces PHP's processing of json data from Python's Post, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.