How can I send post data and read it?

Question

PHP

Actually, you need to transfer data to node via php.
I used the curl library

$curl = curl_init();
                    $data = array('message' => 'test');
                
                    curl_setopt($curl, CURLOPT_URL, "http://localhost:8888");
                    curl_setopt($curl, CURLOPT_POST, 1);
                    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
                
                    curl_exec($curl);

But further, please tell me how to read the data in the node?

var app = require('http').createServer(handler)
  , io = require('socket.io').listen(app)
  //, fs = require('fs')
  //, qs = require('querystring')

app.listen(8888);



console.log('START');

function handler(req, res) 
{
    console.log('HANDLER');

      console.log('STATUS: ' + res.statusCode);
      console.log('HEADERS: ' + res.headers);
     
 
     console.log("message: " + req.body.message);

    //console.log(res);
    
}

Somewhere along the docks I found this topic:
console.log("message: " + req.body.message);
However, the node crashes with an error not found
Please tell me how can I send the post data and read it?