node4others

Node.js for PHP Developer

php

function roomlist() {
  $rooms = array();
  $room_list = mysql_query(
    'SELECT room FROM '.SQL_PREFIX.'chats GROUP BY room ORDER BY room ASC'
  );
  while (
    $row = mysql_fetch_assoc($room_list)) {
    $room = $row['room'];
    $rooms[] = $room;
  }
  print json_encode($r);
}

node.js

function roomlist() {
  const rooms = [];
  link.query(
    'SELECT room FROM ' + SQL_PREFIX + 'chats GROUP BY room ORDER BY room ASC',
    function (err, rows, fields) {
      for (var r = 0; r < rows.length; ++r) {
        const row = rows[r];
        const room = row['room'];
        rooms.push(room);
      }
      res.writeHead(200, {
        'Content-Type': 'text/plain'
      });
      res.end(JSON.stringify(r));
    }
  });
};

code from: Node.js for PHP developers, viii

Chapters

Chapter 1, Node.js Basics Chapter 2, A Simple Node.js Framework Chapter 3, Simple Callbacks Chapter 4, Advanced Callbacks

This chapter presents a more sophisticated and generic way to refactor blocking PHP 4 source code to simulate anonymous functions, function variables, and clo‐ sure.
For PHP 5 source code, it explains how to use PHP 5 features to actually implement anonymous functions, function variables, and closure.

Chapter 5, HTTP Responses Chapter 6, Syntax Chapter 7, Variables Chapter 8, Classes Chapter 9, File Access Chapter 10, MySQL Access Chapter 11, Plain Text, JSON, and XML Chapter 12, Miscellaneous Functions

Node.js implementations for PHP API functions.
speed along conversion
contrast PHP and Node.js

Node.js for Java Developer

enide plugin
https://strongloop.com/strongblog/node-js-java-getting-started/