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<?php final class Gender { const UNKNOWN = 0; const MALE = 1; const FEMALE = 2; const NOT_APPLICABLE = 9; public static function from($value) { static $names; if ( ! $names) { $class = new ReflectionClass(self::class); $constants = $class->getConstants(); $names = array_keys($constants); } foreach ($names as $name) { if (constant(__CLASS__ . '::' . $name) === $value) { return $name; } } throw new InvalidArgumentException('No matching gender for value ' . $value); } // no instances allowed private function __construct() {} } echo Gender::from(Gender::FEMALE); ?>
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
FEMALE
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/Dp8PE on line 14
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_CLASS, expecting T_STRING or T_VARIABLE or '$' in /in/Dp8PE on line 14
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_CLASS, expecting T_STRING or T_VARIABLE or '$' in /in/Dp8PE on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/Dp8PE on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CLASS in /in/Dp8PE on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Dp8PE on line 3
Process exited with code 255.
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205.09 ms | 401 KiB | 313 Q