original_string: public static function isMonthValid($card)
  	{
  		$isValid = false;
  
  		if(isset($card['expiryMonth'])) {
  
  			$isExpiryMonthEmpty = CheckoutApi_Lib_Validator::isEmpty($card['expiryMonth'],false);
  			
  			if(!$isExpiryMonthEmpty && CheckoutApi_Lib_Validator::isInteger($card['expiryMonth']) && ($card['expiryMonth']  > 0 && $card['expiryMonth'] < 13)) {
  				$isValid = true;
  			} 
  		} 
  
  		return $isValid;
  	}
code: public static function isMonthValid($card)
  	{
  		$isValid = false;
  
  		if(isset($card['expiryMonth'])) {
  
  			$isExpiryMonthEmpty = CheckoutApi_Lib_Validator::isEmpty($card['expiryMonth'],false);
  			
  			if(!$isExpiryMonthEmpty && CheckoutApi_Lib_Validator::isInteger($card['expiryMonth']) && ($card['expiryMonth']  > 0 && $card['expiryMonth'] < 13)) {
  				$isValid = true;
  			} 
  		} 
  
  		return $isValid;
  	}
code_tokens: public static function isMonthValid ( $ card ) { $ isValid = false ; if ( isset ( $ card [ 'expiryMonth' ] ) ) { $ isExpiryMonthEmpty = CheckoutApi_Lib_Validator :: isEmpty ( $ card [ 'expiryMonth' ] , false ) ; if ( ! $ isExpiryMonthEmpty && CheckoutApi_Lib_Validator :: isInteger ( $ card [ 'expiryMonth' ] ) && ( $ card [ 'expiryMonth' ] > 0 && $ card [ 'expiryMonth' ] < 13 ) ) { $ isValid = true ; } } return $ isValid ; }
docstring: A helper method that check if month is properly set in payload card object
  @param array $card
  @return bool
  Simple usage:
  CheckoutApi_Client_Validation_GW3::isMonthValid($card)
docstring_tokens: A helper method that check if month is properly set in payload card object