update : 2015.11.03
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The SplEnum class
SPL Types
PHP Manual

The SplEnum class

(PECL spl_types >= 0.1.0)

소개

SplEnum gives the ability to emulate and create enumeration objects natively in PHP.

클래스 개요

SplEnum extends SplType {
/* Constants */
const NULL __default = null ;
/* 메소드 */
public array getConstList ([ bool $include_default = false ] )
/* 상속된 메소드 */
SplType::__construct ([ mixed $initial_value [, bool $strict ]] )
}

예약 상수

SplEnum::__default

예제

Example #1 SplEnum usage example

<?php
class Month extends SplEnum {
    const __default = self::January;
    
    const January = 1;
    const February = 2;
    const March = 3;
    const April = 4;
    const May = 5;
    const June = 6;
    const July = 7;
    const August = 8;
    const September = 9;
    const October = 10;
    const November = 11;
    const December = 12;
}

echo new Month(Month::June) . PHP_EOL;

try {
    new Month(13);
} catch (UnexpectedValueException $uve) {
    echo $uve->getMessage() . PHP_EOL;
}
?>

위 예제의 출력:

6
Value not a const in enum Month

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SPL Types
PHP Manual