Just PHP FUN 139.

just_php_fun_139.md

Just PHP FUN 139.

• https://www.codewars.com/kata/559536379512a64472000053 Playing with passphrases.

Started at 23:58 27.10.2020 Tuesday Oct.
Finished at 22:01 28.10.2020 Wendesday Oct. (22hrs 3 minutes)

playPass.php

<?php
# https://www.codewars.com/kata/559536379512a64472000053 Playing with passphrases.
function playPass($s, $n) {
    $s = str_split($s);
    $s = array_map(function($x) use ($n){
      if(preg_match('/[A-Z]/',$x)){
        return char($x,$n);
      }
      if(preg_match('/[0-9]/',$x)){
        return digit($x);
      }
      return $x;
    },$s);
  for($i = 0; $i < count($s); $i += 1) if(1 == $i%2) $s[$i] = strtolower($s[$i]);
  return strrev(implode($s));
}

function char($c,$n){
  return chr( ((ord($c) + $n - ord("A"))%(ord("Z")-ord("A")+1)) + ord("A"));
}
function digit($c){
  $ans =  strval(9 - intval($c));
  return $ans;
  
}