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@ 2022-01-16T21:52:49Z

<?php

function RomanNumeralValues() {
    return [
            'I'=>1,
            'V'=>5,
            'X'=>10,
            'L'=>50,
            'C'=>100,
            'D'=>500,
            'M'=>1000,
  ];
}

function ConvertRomanNumeralToArabic($input_roman){
  $input_length = strlen($input_roman);
  if($input_length === 0) {
      return $result;
  }
  
  $roman_numerals = RomanNumeralValues();
  
  $current_pointer = 1;
  $result = 0;
  
  for($i = $input_length - 1; $i > -1; $i--){ 
      $letter = $input_roman[$i];
      $letter_value = $roman_numerals[$letter];
      if($letter_value === $current_pointer) {
        $result += $letter_value;
      } elseif ($letter_value < $current_pointer) {
          $result -= $letter_value;
      } else {
        $result += $letter_value;
        $current_pointer = $letter_value;
      }
  }
  
  return $result;
}

print ConvertRomanNumeralToArabic("LIX");

Output for git.master, git.master_jit, rfc.property-hooks: 59

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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