Just PHP FUN 008.

findShort.php

<?php
# https://www.codewars.com/kata/57cebe1dc6fdc20c57000ac9 Shortest Word.
function findShort($str){
  $matches = [];
  preg_match_all('/[a-z]+/',$str,$matches);
  return min(array_map('strlen',$matches[0]));
}

GetFreeUrinals.php

<?php
# https://www.codewars.com/kata/5e2733f0e7432a000fb5ecc4 How many urinals are free?
function GetFreeUrinals($urinals){
  $count = 0;
  if(false !== strpos($urinals,"11")) {
    return -1;
    }
  $arr = str_split($urinals);
  $prev = "0";
  foreach($arr as $i => $v){
    $nxt = $i < count($arr) - 1 ? $arr[$i+1] : "0";
    if("1" == $v){
      $prev = "1";
    }else{
      if("0" == $prev && "0" == $nxt ){
        $count += 1;
        $prev = "1";
      }else{
        $prev = "0";
      }
    }
    
  }
  return $count;
}

just_php_fun_008.md

Just PHP FUN 008.

• https://www.codewars.com/kata/5e2733f0e7432a000fb5ecc4 How many urinals are free?
• https://www.codewars.com/kata/57cebe1dc6fdc20c57000ac9 Shortest Word.
• https://www.codewars.com/kata/5b39e3772ae7545f650000fc Remove duplicate words.
• https://www.codewars.com/kata/58ce8725c835848ad6000007 Drying Potatoes. ans=54 int=53 ans_int=53 rownd=54 why?.
• https://www.codewars.com/kata/569b5cec755dd3534d00000f Looking for a benefactor.

Started at 18:40 27.05.2020 Wednesday May.
Finished at 22:50 27.05.2020 Wednesday May. (3hrs 50minutes)

newAvg.php

<?php
# https://www.codewars.com/kata/569b5cec755dd3534d00000f Looking for a benefactor.
function newAvg($arr, $newavg) {
    $sum = array_sum($arr);
    $n = count($arr);
    $answer = $newavg * ($n+1) - $sum;
    if($answer <= 0) throw new InvalidArgumentException("Incorrect donation.");
    return ceil($answer);
}

potatoes.php

<?php
# https://www.codewars.com/kata/58ce8725c835848ad6000007 Drying Potatoes.
function potatoes($p0, $w0, $p1) {
    echo "p0=$p0, w0=$w0, p1=$p1\n";
    $p0 = $p0 * 0.01; $p1 = $p1 * 0.01;
    $a  = round($w0*(1-$p0),2);
    $b  = round(1-$p1,2);
    $c = intval($a/$b);
    echo "a=$a, b=$b, c=$c\n";
    return $c;
    
}
#--------------------------------------------------------------------
function potatoes($p0, $w0, $p1) {
    echo "p0=$p0, w0=$w0, p1=$p1\n";
    $p0 = $p0 * 0.01; $p1 = $p1 * 0.01;
    $ans = ($w0*(1-$p0))/(1-$p1);
    $int = intval(($w0*(1-$p0))/(1-$p1));
    $round = round($ans);
    $ans_int = intval($ans);
    # p0=82, w0=57, p1=81
    # ans=54 int=53 ans_int=53 rownd=54 why?
    echo "ans=$ans int=$int ans_int=$ans_int round=$round\n";
    if($ans == $round) echo "Ans == round\n";
    return $int;
}

removeDuplicateWords.php

<?php
# https://www.codewars.com/kata/5b39e3772ae7545f650000fc Remove duplicate words.
function removeDuplicateWords($s) {
  return  implode(" ",array_unique(explode(" ", $s)));
}