PHP Decode

<?php 
/** 
 * This file is a part of the miniorange-saml-20-single-sign-on plugin. 
 * 
 * @link https://plugins.miniorange.com/ 
 * @author miniOrange 
 * @package miniorange-saml-20-single-sign-on 
 */ 
 
 
abstract class BasicEnum 
{ 
    private static $constCacheArray = NULL; 
    public static function getConstants() 
    { 
        if (!(self::$constCacheArray == NULL)) { 
            goto ny; 
        } 
        self::$constCacheArray = array(); 
        ny: 
        $M_ = get_called_class(); 
        if (array_key_exists($M_, self::$constCacheArray)) { 
            goto T0; 
        } 
        $qA = new ReflectionClass($M_); 
        self::$constCacheArray[$M_] = $qA->getConstants(); 
        T0: 
        return self::$constCacheArray[$M_]; 
    } 
    public static function isValidName($TK, $Ud = false) 
    { 
        $cr = self::getConstants(); 
        if (!$Ud) { 
            goto vP; 
        } 
        return !empty($cr[$TK]); 
        vP: 
        $mz = array_map("strtolower", array_keys($cr)); 
        return Utilities::mo_saml_in_array(strtolower($TK), $mz); 
    } 
    public static function isValidValue($Hr, $Ud = true) 
    { 
        $Gu = array_values(self::getConstants()); 
        return Utilities::mo_saml_in_array($Hr, $Gu, $Ud); 
    } 
} 
 ?>