Change file extension on the current directory from PHP to HTML

changeFileExtension.js

const fs = require('fs')
const cwd = process.cwd()

fs.readdir(cwd, 'utf8', (err, files) => {
  if (err)
    throw err

  files.map(f => fs.rename(f, f.replace('php', 'html'), (err, file) => {
    if (err)
      throw err
  }))
})