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<?php namespace JoshDiFabio; interface RomanNumeralGeneratorInterface { /** * @param int $number * @return string * @throws \InvalidArgumentException Argument not an integer or out of range * @author Josh Di Fabio <joshdifabio@hotmail.com> */ public function generate($number); } class RomanNumeral { const ONE = 'I'; const FOUR = 'IV'; const FIVE = 'V'; const NINE = 'IX'; const TEN = 'X'; const FOURTY = 'XL'; const FIFTY = 'L'; const NINETY = 'XC'; const ONE_HUNDRED = 'C'; const FOUR_HUNDRED = 'CD'; const FIVE_HUNDRED = 'D'; const NINE_HUNDRED = 'CM'; const ONE_THOUSAND = 'M'; /** * @return array * @author Josh Di Fabio <joshdifabio@hotmail.com> */ public static function getIntegerToNumeralMap() { return array( 1 => RomanNumeral::ONE, 4 => RomanNumeral::FOUR, 5 => RomanNumeral::FIVE, 9 => RomanNumeral::NINE, 10 => RomanNumeral::TEN, 40 => RomanNumeral::FOURTY, 50 => RomanNumeral::FIFTY, 90 => RomanNumeral::NINETY, 100 => RomanNumeral::ONE_HUNDRED, 400 => RomanNumeral::FOUR_HUNDRED, 500 => RomanNumeral::FIVE_HUNDRED, 900 => RomanNumeral::NINE_HUNDRED, 1000 => RomanNumeral::ONE_THOUSAND, ); } } class RomanNumeralGenerator implements RomanNumeralGeneratorInterface { /** * @param int $number * @return string * @throws \InvalidArgumentException Argument not an integer or out of range * @author Josh Di Fabio <joshdifabio@hotmail.com> */ public function generate($number) { if (!is_integer($number)) { throw new \InvalidArgumentException('Provided argument is not an integer.'); } if (1 > $number || 3999 < $number) { throw new \InvalidArgumentException( 'The provided number is not within the allowed range of 1 to 3999.'); } $numeralString = ''; $integerToNumeralMap = RomanNumeral::getIntegerToNumeralMap(); krsort($integerToNumeralMap); while (0 < $number) { foreach ($integerToNumeralMap as $_integer => $_numeral) { /* * if the input number less any already selected numerals is larger than the current * numeral, select the current numeral and deduct its integer value from the input * number */ if ($number >= $_integer) { $numeralString .= $_numeral; $number -= $_integer; break; } } } return $numeralString; } } $generator = new RomanNumeralGenerator; echo $generator->generate(4000);
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught InvalidArgumentException: The provided number is not within the allowed range of 1 to 3999. in /in/YgAWV:69 Stack trace: #0 /in/YgAWV(97): JoshDiFabio\RomanNumeralGenerator->generate(4000) #1 {main} thrown in /in/YgAWV on line 69
Process exited with code 255.
Output for 5.3.0 - 5.6.28
Fatal error: Uncaught exception 'InvalidArgumentException' with message 'The provided number is not within the allowed range of 1 to 3999.' in /in/YgAWV:69 Stack trace: #0 /in/YgAWV(97): JoshDiFabio\RomanNumeralGenerator->generate(4000) #1 {main} thrown in /in/YgAWV on line 69
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/YgAWV on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/YgAWV on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/YgAWV on line 2
Process exited with code 255.