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<?php namespace MabeEnum; use ReflectionClass; use InvalidArgumentException; use LogicException; abstract class Enum { /** * The selected value * * @var null|boolean|int|float|string */ private $value; /** * The ordinal number of the value * * @var null|int */ private $ordinal; /** * An array of available constants by class * * @var array ["$class" => ["$const" => $value, ...], ...] */ private static $constants = array(); /** * Already instantiated enums * * @var array ["$class" => ["$const" => $instance, ...], ...] */ private static $instances = array(); /** * Constructor * * @param null|boolean|int|float|string $value The value to select * @param int|null $ordinal The ordinal number of the value */ final private function __construct($value, $ordinal = null) { $this->value = $value; $this->ordinal = $ordinal; } /** * Get the current selected constant name * * @return string * @see getName() */ public function __toString() { return $this->getName(); } /** * @throws LogicException Enums are not cloneable * because instances are implemented as singletons */ final private function __clone() { throw new LogicException('Enums are not cloneable'); } /** * @throws LogicException Enums are not serializable * because instances are implemented as singletons */ final public function __sleep() { throw new LogicException('Enums are not serializable'); } /** * @throws LogicException Enums are not serializable * because instances are implemented as singletons */ final public function __wakeup() { throw new LogicException('Enums are not serializable'); } /** * Get the current selected value * * @return null|boolean|int|float|string */ final public function getValue() { return $this->value; } /** * Get the current selected constant name * * @return string */ final public function getName() { return array_search($this->value, self::detectConstants(get_called_class()), true); } /** * Get the ordinal number of the selected value * * @return int */ final public function getOrdinal() { if ($this->ordinal !== null) { return $this->ordinal; } // detect ordinal $ordinal = 0; $value = $this->value; foreach (self::detectConstants(get_called_class()) as $constValue) { if ($value === $constValue) { break; } ++$ordinal; } $this->ordinal = $ordinal; return $ordinal; } /** * Compare this enum against another enum and check if it's the same value * * @param mixed $value * @return boolean */ final public function is($enum) { return $this->value === $enum || (($enum instanceof static || $this instanceof $enum) && $this->value === $enum->getValue()); } /** * Get an enum of the given value * * @param static|null|boolean|int|float|string $value * @return static * @throws InvalidArgumentException On an unknwon or invalid value * @throws LogicException On ambiguous constant values */ final public static function get($value) { if ($value instanceof static) { $value = $value->getValue(); } $class = get_called_class(); $constants = self::detectConstants($class); $name = array_search($value, $constants, true); if ($name === false) { if (is_scalar($value)) { throw new InvalidArgumentException('Unknown value ' . var_export($value, true)); } else { throw new InvalidArgumentException('Invalid value of type ' . gettype($value)); } } if (isset(self::$instances[$class][$name])) { return self::$instances[$class][$name]; } return self::$instances[$class][$name] = new $class($constants[$name]); } /** * Get an enum by the given name * * @param string $name The name to instantiate the enum by * @return static * @throws InvalidArgumentException On an invalid or unknown name * @throws LogicException On ambiguous constant values */ final public static function getByName($name) { $name = (string) $name; $class = get_called_class(); if (isset(self::$instances[$class][$name])) { return self::$instances[$class][$name]; } $const = $class . '::' . $name; if (!defined($const)) { throw new InvalidArgumentException($const . ' not defined'); } return self::$instances[$class][$name] = new $class(constant($const)); } /** * Get an enum by the given ordinal number * * @param int $ordinal The ordinal number to instantiate the enum by * @return static * @throws InvalidArgumentException On an invalid ordinal number * @throws LogicException On ambiguous constant values */ final public static function getByOrdinal($ordinal) { $ordinal = (int) $ordinal; $class = get_called_class(); $constants = self::detectConstants($class); $item = array_slice($constants, $ordinal, 1, false); if (!$item) { throw new InvalidArgumentException(sprintf( 'Invalid ordinal number, must between 0 and %s', count($constants) - 1 )); } $name = key($item); if (isset(self::$instances[$class][$name])) { return self::$instances[$class][$name]; } return self::$instances[$class][$name] = new $class(current($item), $ordinal); } /** * Clears all instantiated enums * * NOTE: This can break singleton behavior ... use it with caution! * * @return void */ final public static function clear() { $class = get_called_class(); unset(self::$instances[$class], self::$constants[$class]); } /** * Get all available constants of the called class * * @return array * @throws LogicException On ambiguous constant values */ final public static function getConstants() { return self::detectConstants(get_called_class()); } /** * Detect constants available by given class * * @param string $class * @return array * @throws LogicException On ambiguous constant values */ private static function detectConstants($class) { var_dump(get_called_class()); if (!isset(self::$constants[$class])) { $reflection = new ReflectionClass($class); $constants = $reflection->getConstants(); // values needs to be unique $ambiguous = array(); foreach ($constants as $value) { $names = array_keys($constants, $value, true); if (count($names) > 1) { $ambiguous[var_export($value, true)] = $names; } } if ($ambiguous) { throw new LogicException( 'All possible values needs to be unique. The following are ambiguous: ' . implode(', ', array_map(function ($names) use ($constants) { return implode('/', $names) . '=' . var_export($constants[$names[0]], true); }, $ambiguous)) ); } // This is required to make sure that constants of base classes will be the first while (($reflection = $reflection->getParentClass()) && $reflection->name !== __CLASS__) { $constants = $reflection->getConstants() + $constants; } self::$constants[$class] = $constants; } return self::$constants[$class]; } /** * Instantiate an enum by a name of a constant. * * This will be called automatically on calling a method * with the same name of a defined constant. * * @param string $method The name to instantiate the enum by (called as method) * @param array $args There should be no arguments * @return static * @throws InvalidArgumentException On an invalid or unknown name * @throws LogicException On ambiguous constant values */ final public static function __callStatic($method, array $args) { return self::getByName($method); } } class TestEnum1 extends Enum { const TEST1 = 'TEST1'; } class TestEnum2 extends TestEnum1 { const TEST2 = 'TEST2'; } $test1 = TestEnum1::TEST1(); $test2 = TestEnum2::TEST2();

Version	System time (s)	User time (s)	Memory (MiB)
8.3.6	0.004	0.011	18.55
8.3.5	0.012	0.006	18.15
8.3.4	0.007	0.007	18.79
8.3.3	0.004	0.011	19.13
8.3.2	0.006	0.003	20.33
8.3.1	0.000	0.009	20.65
8.3.0	0.003	0.006	19.38
8.2.18	0.007	0.011	16.50
8.2.17	0.006	0.009	22.96
8.2.16	0.009	0.006	20.60
8.2.15	0.004	0.004	24.18
8.2.14	0.004	0.004	24.66
8.2.13	0.000	0.008	26.16
8.2.12	0.008	0.000	22.24
8.2.11	0.009	0.000	21.99
8.2.10	0.000	0.012	17.91
8.2.9	0.005	0.003	18.00
8.2.8	0.006	0.003	19.04
8.2.7	0.008	0.000	17.75
8.2.6	0.000	0.009	18.29
8.2.5	0.000	0.008	18.29
8.2.4	0.005	0.003	17.75
8.2.3	0.007	0.004	17.90
8.2.2	0.003	0.005	17.89
8.2.1	0.005	0.003	18.11
8.2.0	0.004	0.004	17.84
8.1.27	0.005	0.003	22.14
8.1.26	0.004	0.004	26.35
8.1.25	0.004	0.004	28.09
8.1.24	0.013	0.000	22.23
8.1.23	0.012	0.000	20.88
8.1.22	0.004	0.004	17.74
8.1.21	0.004	0.004	18.77
8.1.20	0.000	0.008	17.47
8.1.19	0.004	0.004	17.35
8.1.18	0.010	0.000	18.10
8.1.17	0.005	0.003	17.62
8.1.16	0.003	0.005	19.11
8.1.15	0.000	0.008	18.61
8.1.14	0.003	0.005	17.55
8.1.13	0.005	0.003	18.03
8.1.12	0.004	0.004	17.46
8.1.11	0.000	0.009	17.60
8.1.10	0.000	0.007	17.57
8.1.9	0.006	0.003	17.56
8.1.8	0.004	0.004	17.55
8.1.7	0.000	0.008	17.47
8.1.6	0.006	0.003	17.75
8.1.5	0.003	0.005	17.57
8.1.4	0.006	0.003	17.60
8.1.3	0.005	0.003	17.65
8.1.2	0.004	0.004	17.76
8.1.1	0.003	0.006	17.75
8.1.0	0.004	0.004	17.46
8.0.30	0.000	0.009	18.77
8.0.29	0.004	0.004	16.75
8.0.28	0.003	0.003	18.57
8.0.27	0.004	0.004	17.25
8.0.26	0.003	0.005	17.23
8.0.25	0.003	0.003	17.13
8.0.24	0.003	0.005	17.13
8.0.23	0.000	0.007	17.17
8.0.22	0.004	0.004	17.05
8.0.21	0.000	0.007	17.04
8.0.20	0.007	0.000	17.16
8.0.19	0.003	0.006	17.10
8.0.18	0.004	0.004	16.91
8.0.17	0.006	0.003	16.98
8.0.16	0.007	0.000	17.05
8.0.15	0.007	0.000	17.07
8.0.14	0.008	0.000	16.99
8.0.13	0.000	0.006	13.46
8.0.12	0.000	0.008	16.92
8.0.11	0.003	0.005	17.01
8.0.10	0.007	0.000	17.06
8.0.9	0.000	0.008	16.89
8.0.8	0.006	0.010	16.97
8.0.7	0.004	0.004	17.01
8.0.6	0.005	0.003	16.95
8.0.5	0.004	0.004	17.08
8.0.3	0.009	0.011	17.07
8.0.2	0.012	0.007	17.42
8.0.1	0.005	0.002	17.14
8.0.0	0.008	0.013	16.82
7.4.33	0.000	0.006	15.00
7.4.32	0.006	0.000	16.56
7.4.30	0.006	0.000	16.54
7.4.29	0.005	0.003	16.73
7.4.28	0.000	0.009	16.60
7.4.27	0.000	0.007	16.71
7.4.26	0.000	0.010	16.60
7.4.25	0.005	0.002	16.56
7.4.24	0.006	0.001	16.57
7.4.23	0.000	0.007	16.52
7.4.22	0.011	0.008	16.66
7.4.21	0.008	0.008	16.64
7.4.20	0.008	0.000	16.41
7.4.16	0.010	0.007	16.46
7.4.15	0.013	0.006	17.40
7.4.14	0.007	0.012	17.86
7.4.13	0.011	0.008	16.67
7.4.12	0.006	0.012	16.65
7.4.11	0.009	0.009	16.60
7.4.10	0.011	0.006	16.52
7.4.9	0.009	0.009	16.57
7.4.8	0.010	0.010	19.39
7.4.7	0.020	0.003	16.61
7.4.6	0.011	0.006	16.71
7.4.5	0.005	0.005	16.72
7.4.4	0.011	0.007	16.66
7.4.3	0.003	0.017	16.60
7.4.0	0.004	0.015	14.91
7.3.33	0.000	0.005	13.37
7.3.32	0.005	0.000	13.33
7.3.31	0.000	0.007	16.28
7.3.30	0.000	0.006	16.45
7.3.29	0.014	0.000	16.55
7.3.28	0.006	0.010	16.50
7.3.27	0.009	0.009	17.40
7.3.26	0.017	0.003	16.45
7.3.25	0.010	0.009	16.62
7.3.24	0.009	0.009	16.50
7.3.23	0.016	0.003	16.45
7.3.21	0.006	0.012	16.43
7.3.20	0.012	0.006	19.39
7.3.19	0.009	0.013	16.48
7.3.18	0.003	0.019	16.60
7.3.17	0.007	0.010	16.38
7.3.16	0.006	0.012	16.48
7.2.33	0.007	0.010	16.93
7.2.32	0.009	0.009	16.95
7.2.31	0.009	0.009	16.90
7.2.30	0.013	0.003	16.95
7.2.29	0.000	0.016	16.92
7.1.10	0.000	0.011	18.32
7.1.7	0.006	0.006	16.97
7.1.6	0.016	0.009	19.61
7.1.5	0.023	0.013	34.47
7.1.0	0.010	0.070	22.30
7.0.20	0.003	0.007	16.69
7.0.14	0.010	0.070	21.97
7.0.10	0.013	0.073	21.76
7.0.9	0.013	0.077	21.69
7.0.8	0.010	0.070	21.80
7.0.7	0.007	0.037	21.73
7.0.6	0.000	0.053	21.71
7.0.5	0.007	0.037	22.05
7.0.4	0.003	0.063	20.15
7.0.3	0.007	0.057	20.15
7.0.2	0.013	0.070	20.18
7.0.1	0.000	0.043	20.07
7.0.0	0.007	0.037	19.95
5.6.28	0.003	0.077	21.20
5.6.25	0.007	0.077	20.87
5.6.24	0.007	0.050	20.57
5.6.23	0.007	0.083	20.83
5.6.22	0.000	0.053	20.76
5.6.21	0.003	0.067	20.62
5.6.20	0.007	0.073	21.04
5.6.19	0.000	0.043	21.24
5.6.18	0.003	0.053	21.09
5.6.17	0.007	0.040	21.03
5.6.16	0.003	0.070	21.12
5.6.15	0.010	0.077	21.09
5.6.14	0.000	0.053	21.10
5.6.13	0.003	0.040	21.18
5.6.12	0.003	0.090	21.03
5.6.11	0.010	0.033	21.11
5.6.10	0.013	0.067	21.09
5.6.9	0.003	0.050	21.19
5.6.8	0.020	0.067	20.56
5.6.7	0.007	0.073	20.47
5.6.6	0.007	0.077	20.46
5.6.5	0.007	0.077	20.39
5.6.4	0.000	0.040	20.51
5.6.3	0.000	0.040	20.36
5.6.2	0.003	0.040	20.51
5.6.1	0.007	0.053	20.38
5.6.0	0.000	0.080	20.49
5.5.38	0.017	0.067	20.40
5.5.37	0.003	0.080	20.62
5.5.36	0.000	0.083	20.55
5.5.35	0.010	0.077	20.38
5.5.34	0.000	0.043	20.91
5.5.33	0.003	0.083	20.96
5.5.32	0.000	0.050	20.98
5.5.31	0.013	0.053	20.96
5.5.30	0.007	0.073	20.88
5.5.29	0.013	0.067	20.96
5.5.28	0.000	0.093	20.96
5.5.27	0.007	0.047	20.86
5.5.26	0.003	0.040	20.99
5.5.25	0.010	0.060	20.66
5.5.24	0.007	0.063	20.27
5.5.23	0.003	0.040	20.36
5.5.22	0.003	0.077	20.33
5.5.21	0.003	0.073	20.31
5.5.20	0.000	0.083	20.33
5.5.19	0.007	0.080	20.20
5.5.18	0.007	0.070	20.28
5.5.16	0.003	0.080	20.30
5.5.15	0.000	0.040	20.18
5.5.14	0.003	0.053	20.30
5.5.13	0.000	0.040	20.17
5.5.12	0.010	0.040	20.24
5.5.11	0.000	0.050	20.21
5.5.10	0.000	0.043	20.15
5.5.9	0.007	0.050	20.11
5.5.8	0.010	0.067	20.16
5.5.7	0.000	0.053	20.19
5.5.6	0.007	0.073	20.07
5.5.5	0.003	0.067	20.07
5.5.4	0.000	0.040	20.09
5.5.3	0.000	0.043	20.16
5.5.2	0.000	0.040	20.21
5.5.1	0.000	0.047	20.13
5.5.0	0.003	0.067	20.13
5.4.45	0.007	0.063	19.45
5.4.44	0.010	0.070	19.56
5.4.43	0.013	0.073	19.19
5.4.42	0.003	0.080	19.18
5.4.41	0.003	0.070	19.10
5.4.40	0.000	0.067	19.13
5.4.39	0.010	0.070	19.03
5.4.38	0.010	0.070	19.04
5.4.37	0.010	0.070	19.14
5.4.36	0.007	0.033	19.18
5.4.35	0.007	0.077	19.24
5.4.34	0.000	0.080	18.89
5.4.32	0.020	0.057	19.12
5.4.31	0.000	0.040	19.18
5.4.30	0.010	0.067	18.96
5.4.29	0.000	0.047	19.04
5.4.28	0.003	0.067	19.12
5.4.27	0.003	0.037	19.20
5.4.26	0.003	0.073	18.89
5.4.25	0.003	0.073	19.05
5.4.24	0.007	0.093	19.13
5.4.23	0.000	0.080	18.95
5.4.22	0.000	0.057	19.25
5.4.21	0.013	0.057	19.13
5.4.20	0.007	0.060	19.11
5.4.19	0.007	0.033	19.15
5.4.18	0.007	0.073	18.89
5.4.17	0.003	0.037	19.13
5.4.16	0.010	0.063	19.22
5.4.15	0.003	0.067	19.11
5.4.14	0.000	0.077	16.46
5.4.13	0.010	0.067	16.40
5.4.12	0.000	0.037	16.45
5.4.11	0.007	0.067	16.38
5.4.10	0.003	0.070	16.33
5.4.9	0.007	0.070	16.42
5.4.8	0.013	0.057	16.47
5.4.7	0.007	0.057	16.43
5.4.6	0.003	0.067	16.43
5.4.5	0.003	0.070	16.48
5.4.4	0.007	0.043	16.38
5.4.3	0.007	0.030	16.50
5.4.2	0.010	0.060	16.41
5.4.1	0.007	0.073	16.41
5.4.0	0.013	0.063	15.82