MySQL/PHPで小数点以下2桁を表示するにはどうすればよいですか?

$number1=10.3423; $number2=10;

$result1=number_format ($number1, 2); $result2=number_format ($number2, 2);

php  $number1=10.3423;  $number2=10;  $result1=number_format ($number1, 2);  $result2=number_format ($number2, 2);  echo ($result1);  echo '
';  echo ($result2); ?>

10.34 10.00