module.exports = function str_split(string, splitLength) {
  //  discuss at: https://locutus.io/php/str_split/
  // original by: Martijn Wieringa
  // improved by: Brett Zamir (https://brett-zamir.me)
  // bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
  //  revised by: Theriault (https://github.com/Theriault)
  //  revised by: Rafał Kukawski (https://blog.kukawski.pl)
  //    input by: Bjorn Roesbeke (https://www.bjornroesbeke.be/)
  //   example 1: str_split('Hello Friend', 3)
  //   returns 1: ['Hel', 'lo ', 'Fri', 'end']

  if (splitLength === null) {
    splitLength = 1
  }
  if (string === null || splitLength < 1) {
    return false
  }

  string += ''
  const chunks = []
  let pos = 0
  const len = string.length

  while (pos < len) {
    chunks.push(string.slice(pos, (pos += splitLength)))
  }

  return chunks
}