code: public static function postRaw($strKey)
  	{
  		$strCacheKey = 'postRaw';
  
  		if (!isset(static::$arrCache[$strCacheKey][$strKey]))
  		{
  			$varValue = static::findPost($strKey);
  
  			if ($varValue === null)
  			{
  				return $varValue;
  			}
  
  			$varValue = static::preserveBasicEntities($varValue);
  			$varValue = static::xssClean($varValue);
  
  			if (!\defined('TL_MODE') || TL_MODE != 'BE')
  			{
  				$varValue = static::encodeInsertTags($varValue);
  			}
  
  			static::$arrCache[$strCacheKey][$strKey] = $varValue;
  		}
  
  		return static::$arrCache[$strCacheKey][$strKey];
  	}
docs: Return a raw, unsafe $_POST variable
  
  @param string $strKey The variable name
  
  @return mixed The raw variable value