Just PHP FUN 022.

binaryArrayToNumber.php

<?php
# https://www.codewars.com/kata/578553c3a1b8d5c40300037c Ones and Zeros.
function binaryArrayToNumber($arr) {
  return bindec(implode('',$arr));
}

incrementer.php

<?php
# https://www.codewars.com/kata/590e03aef55cab099a0002e8 Incrementer.
# https://www.codewars.com/users/Dzienny
function incrementer($nums) {
  foreach($nums as $i=>&$n) $n = ($n + $i + 1)%10;
  return $nums;
}
#-------------------------------------------------
function incrementer($nums) {
  foreach($nums as $i=>$v) $nums[$i] = ($nums[$i]+($i+1))%10;
  return $nums;
}

just_php_fun_022.md

Just PHP FUN 022.

• https://www.codewars.com/kata/598d91785d4ce3ec4f000018 Word values.
• https://www.codewars.com/kata/578553c3a1b8d5c40300037c Ones and Zeros.
• https://www.codewars.com/kata/5901f361927288d961000013 Product of Array Items.
• https://www.codewars.com/kata/59dd2c38f703c4ae5e000014 Numbers in strings.
• https://www.codewars.com/kata/590e03aef55cab099a0002e8 Incrementer.
  foreach($nums as $i => &$n) $n = ($n + $i + 1)%10;

Started at 22:00 12.06.2020 Friday June.
Finished at 22:45 12.06.2020 Friday June. (0hrs 45minutes)

product.php

<?php
# https://www.codewars.com/kata/5901f361927288d961000013 Product of Array Items.
function product($a) {
  if(empty($a)) return null;
  return array_product($a);
}

solve.php

<?php
# https://www.codewars.com/kata/59dd2c38f703c4ae5e000014 Numbers in strings.
function solve($s) {
  return max(array_filter(explode(' ',preg_replace('/[a-z]/',' ',$s))));
}

word_value.php

<?php
# https://www.codewars.com/kata/598d91785d4ce3ec4f000018 Word values.
function word_value(array $a): array {
  $ans = [];
  foreach($a as $i=>$v){
    $sum = 0;
    foreach(str_split(preg_replace('/[^a-z]/',"",$v)) as $c) $sum += ($i+1) * (ord($c)+1 - ord('a'));
    array_push($ans,$sum);
    }
  return $ans;
}