Just PHP FUN 019.

circle_of_numbers.php

<?php
# https://www.codewars.com/kata/58841cb52a077503c4000015 Simple Fun #2: Circle of Numbers.
function circle_of_numbers(int $n, int $first_number): int {
  return ($first_number + $n/2)%$n;
}

flatten_and_sort.php

<?php
# https://www.codewars.com/kata/57ee99a16c8df7b02d00045f Flatten and sort an array.
function flatten_and_sort($a) {
  $x = [];
  array_walk_recursive($a,function($z) use (&$x){ array_push($x,$z);});
  sort($x);
  return $x;
}

just_php_fun_019.md

Just PHP FUN 019.

• https://www.codewars.com/kata/586909e4c66d18dd1800009b Currying functions: multiply all elements in an array.
• https://www.codewars.com/kata/57f8ee485cae443c4d000127 Spacify.
• https://www.codewars.com/kata/5a5032f4fd56cb958e00007a TV Remote.
• https://www.codewars.com/kata/58841cb52a077503c4000015 Simple Fun #2: Circle of Numbers.
• https://www.codewars.com/kata/57ee99a16c8df7b02d00045f Flatten and sort an array.

Start at 20:38 09.06.2020 Tuesday June.
Finished at 23:35 09.06.2020 Tuesday June. (2hrs 57minutes)

multiply_all.php

<?php
# https://www.codewars.com/kata/586909e4c66d18dd1800009b Currying functions: multiply all elements in an array.
/* left blank for unlimited creativity :) */
function multiply_all($array){
  return function($x) use($array){ 
   return array_map( function($y) use ($x){
     return $x * $y;
   },
   $array);
  };
}

spacify.php

<?php
# https://www.codewars.com/kata/57f8ee485cae443c4d000127 Spacify.
function spacify(string $s): string {
  return trim(preg_replace('/./',"$0 ",$s));
}

tvRemote.php

<?php
# https://www.codewars.com/kata/5a5032f4fd56cb958e00007a TV Remote.
function tvRemote($word) {
  // Your code here
  $arr = fill();
  draw($arr);
  $x = 0;
  $y = 0;
  $sum = 0;
  $word = str_split($word);
  foreach($word as $char){
   list($x1,$y1) = explode(":",$arr[$char]);
   $sum += abs($x - $x1) + abs($y - $y1) + 1;
   $x = $x1; $y = $y1;
  }
  return $sum;
}
function fill(){
    $ans = [];
    arr_fill(range("a","y"),$ans,5,0,0);
    arr_fill(range("1","9"),$ans,3,5,0);
    arr_fill(str_split(".@0z_/"),$ans,3,5,3);
    return $ans;
}

function arr_fill($source, &$dest, $md, $dx, $dy){
    foreach($source as $i=>$v){
      $x = $i%$md + $dx;
      $y = ($i - $i%$md)/$md + $dy;
      $dest[$v] = $x.":".$y;
    }
}
function draw(&$arr){
  $x = array_flip($arr);
  for($j = 0 ; $j < 5; $j += 1){
    for($i = 0; $i < 8; $i += 1){
      echo $x[$i.":".$j];
    }
    echo "\n";
  }
  
}

array_flip(): Can only flip STRING and INTEGER values!