counter_effect.php

<?php
# https://www.codewars.com/kata/57b6f850a6fdc76523001162 Hit Count.
function counter_effect($hit_count) {
  return array_map(function($x){ return range(0,$x);}, str_split($hit_count));
}

encode.php

<?php
# https://www.codewars.com/kata/593f50f343030bd35e0000c6 Ciphers #1 - The 01 Cipher
function encode(string $s): string {
  return preg_replace_callback('/[a-z]/i',function($x){
    $x = strtolower($x[0]);
    return 0 == (ord($x)-ord('a'))%2 ? '0' : '1';
  },$s);
}

four_piles.php

<?php
# https://www.codewars.com/kata/57aae4facf1fa57b3300005d T.T.T.27: Four piles of apples.
function four_piles(int $n, int $y): array {
  $x = $n/(2+$y+1/$y);
  $nn = $x+$y + $x-$y + $x*$y + $x/$y;
  $x_str = strval($x);
  echo "$x $y $n $nn \n";
  echo "this is $x_str\n";
  if(strstr($x_str,".")){ echo "$x_str has a dot!\n";
                        return []; }
  $x = intval($x_str);
  if($x <= $y) {echo "Negative\n"; return [];}
  return [$x+$y,$x-$y,$x*$y, $x/$y];
  
}

just_php_fun_047.md

Just PHP FUN 047.

• https://www.codewars.com/kata/58ef87dc4db9b24c6c000092/ Sectional Array Sort.
• https://www.codewars.com/kata/57aae4facf1fa57b3300005d T.T.T.27: Four piles of apples.
• https://www.codewars.com/kata/593f50f343030bd35e0000c6 Ciphers #1 - The 01 Cipher.
• https://www.codewars.com/kata/57b6f850a6fdc76523001162 Hit Count.
• https://www.codewars.com/kata/58b972cae826b960a300003e Jenny the youngest detective.

Started at 22:29 at 11.07.2020 Saturday July.
Finished at 02:04 at 12.07.2020 Sunday July. ( 3hrs 35mintes)

missing.php

<?php
# https://www.codewars.com/kata/58b972cae826b960a300003e Jenny the youngest detective.
function missing($nums, $str) {
  sort($nums); $str = str_split(str_replace(" ",'',strtolower($str))); $ans = "";
  foreach($nums as $v){
    if(!isset($str[$v])) return "No mission today";
    $ans .= $str[$v]; 
  }
  return $ans;
}

sect_sort.php

<?php
# https://www.codewars.com/kata/58ef87dc4db9b24c6c000092/ Sectional Array Sort.
function sect_sort($array, $start, $length = null) {
  echo "input:".implode(",",$array)."\n";
  $a = array_slice($array,0,$start);
  if($length){
    $b = array_slice($array,$start,$length);
    $c = array_slice($array,$start+$length);
  }else{
    $b = array_slice($array,$start);
    $c = [];
  }
  sort($b);
  return array_merge($a,array_values($b),$c);
}

Strange behaviour in PHP fractions:
x = 7144 y = 76 n = 557326 nn = 557326 xx = 7144
Fraction

function four_piles(int $n, int $y): array {
  $x = $n/(2+$y+1/$y);
  $nn = $x+$y + $x-$y + $x*$y + $x/$y;
  $xx = floor($x);
  echo "x = $x  y = $y   n = $n  nn = $nn  xx = $xx\n";
  if( floor($x) != $x) {echo "Fraction\n"; return [];}
  if($x <= $y) {echo "Negative\n"; return [];}
  return [$x+$y,$x-$y,$x*$y, $x/$y];
  
}

One more
x = 459 y = 51 n = 24336 nn = 24336 xx = 458
x_str = 459 and xx_str = 458
Fraction

function four_piles(int $n, int $y): array {
  $x = $n/(2+$y+1/$y);
  $nn = $x+$y + $x-$y + $x*$y + $x/$y;
  $xx = floor($x);
  $x_str = strval($x);
  $xx_str = strval($xx);
  echo "x = $x  y = $y  n = $n  nn = $nn xx = $xx \n";
  echo " x_str = $x_str and xx_str = $xx_str \n";
  if( floor($x) != $x) {echo "Fraction\n"; return [];}
  if($x <= $y) {echo "Negative\n"; return [];}
  return [$x+$y,$x-$y,$x*$y, $x/$y];
  
}