Just PHP FUN 064.

calculate_speed.php

<?php
# https://www.codewars.com/kata/57b365f81fae8a0571000142 Measuring Average Speed.
function calculate_speed($distance, $time) {
  $distance = convert_to_metters($distance);
  $time = convert_to_sec($time);
  $speed = $distance/$time;
  return sprintf("%.0fmph",$speed*2.23694);
}

function convert_to_metters($dist){
  if(preg_match('/^(\d+)m$/',$dist,$match)){ return intval($match[0]); }
  if(preg_match('/^(\d+)km$/',$dist,$match)){ return intval($match[0])*1000; }
  throw new Exception($dist.' incorect distance value.');
}

function convert_to_sec($time){
  if(preg_match('/^(\d+)s$/',$time,$match)){ return intval($match[0]); }
  if(preg_match('/^(\d+)min$/',$time,$match)){ return intval($match[0])*60; }
  throw new Exception($time.' incorect time value.');
}

dateCorrect.php

<?php
# https://www.codewars.com/kata/5787628de55533d8ce000b84 Correct the date-string.
function dateCorrect($datestring) {
    if(!$datestring) return $datestring;
    if(preg_match('/^(\d{2})\.(\d{2})\.(\d{4})$/',$datestring,$match)){
      $day = intval($match[1]);
      $month = intval($match[2]);
      $year = intval($match[3]);
      echo "$day, $month, $year \n";
      $y = $year + floor($month/12);
      $mnth = $month%12;
      $day = $day - 1;
      echo "$day, $mnth, $y \n";
      $date = new DateTime();
      $date->setDate($y, $mnth, 1);
      echo "First ".$date->format('d.m.Y')."\n";
      $date->add(new DateInterval("P".$day."D"));
      echo "Second ".$date->format('d.m.Y')."\n";
      return $date->format('d.m.Y');
    }
    return null;
}

fibs_fizz_buzz.php

<?php
# https://www.codewars.com/kata/57bf599f102a39bb1e000ae5 Fibonacci's FizzBuzz.
function fibs_fizz_buzz($n) {
  if(1 == $n) return [1];
  if(2 == $n) return [1,1];
  $a = 1; $b = 1; $i = 2; $ans = [1,1]; $new_b = 0;
  for( ; $i < $n; $i += 1){
    $new_b = $a+$b; $a = $b; $b = $new_b;
    if(0 == $new_b%15) {$new_b = 'FizzBuzz'; }
    elseif ( 0 == $new_b%3) {$new_b = "Fizz";}
    elseif (0 == $new_b%5) {$new_b = "Buzz";}
    array_push($ans, $new_b);
  }
  return $ans;
}

iccanobif.php

<?php
# https://www.codewars.com/kata/58049aa58f5e65b6da0000ef The iccanobiF Sequence.
function iccanobif($n) {
  if(1 == $n) return [1];
  if(2 == $n) return [1,1];
  $a = 1; $b = 1; $i = 2;
  $answer = [1,1];
  for( ; $i < $n; $i += 1){
    $new_b = $a+$b;
    $a = $b; $b = $new_b;
    array_unshift($answer, $b);
  }
  return $answer;
}

just_php_fun_064.md

Just PHP FUN 064.

• https://www.codewars.com/kata/58049aa58f5e65b6da0000ef The iccanobiF Sequence.
• https://www.codewars.com/kata/579775203467db17b500037b Object-Oriented PHP #2 - Class Constructors and $this.
• https://www.codewars.com/kata/57bf599f102a39bb1e000ae5 Fibonacci's FizzBuzz.
• https://www.codewars.com/kata/57b365f81fae8a0571000142 Measuring Average Speed.
• https://www.codewars.com/kata/567b39b27d0a4606a5000057 Genetic Algorithm Series - #2 Mutation.
• https://www.codewars.com/kata/5783d8f3202c0e486c001d23 Convert an array of strings to array of numbers.
• https://www.codewars.com/kata/5787628de55533d8ce000b84 Correct the date-string.

Started at 21:44 31.07.2020 Friday July.
Finished at 23:38 31.07.2020 Friday July. (1hr 54minutes)

mutate.php

<?php
# https://www.codewars.com/kata/567b39b27d0a4606a5000057 Genetic Algorithm Series - #2 Mutation.
function mutate($chromosome, $p) {
  $p = $p * 100;
  return implode(array_map(fn($x) => rand(1,100) <= $p ? intval(!$x) : $x, str_split($chromosome)));
}

person_php_oop2.php

<?php
# https://www.codewars.com/kata/579775203467db17b500037b Object-Oriented PHP #2 - Class Constructors and $this.
class Person{
  public $first_name, $last_name;
  public function __construct($f,$l){
    $this->first_name = $f; $this->last_name = $l;
  } 
  public function get_full_name(){
    return "$this->first_name $this->last_name";
  }
}

toNumberArray.php

<?php
# https://www.codewars.com/kata/5783d8f3202c0e486c001d23 Convert an array of strings to array of numbers.
function toNumberArray(array $stringArray) : array {
  return array_map(function($x){return floatval($x);},$stringArray);
}