拍拍尘土

1.number_format
$number = 1234.5678;
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,57
$english_format_number = number_format($number, 2, '.', '');
// 1234.57

2.round
$number = 1234.5678;
echo round($number ,2);
//1234.57

3.sprintf
$formatted = sprintf ("%s有￥%01.2f。",$name, $money);
echo $formatted;
//张三有￥123.10。