PHP:将数字四舍五入到小数点后 2 位，如果数字是整数，则添加尾随零

PHP: Round a number upto 2 decimal places and if the number is a whole number then add trailing zeros

    $number = 153.78999
    $rounded_value = round($number,2);
    $rounded_value will be 153.79

    $number = 153

    $rounded_value = 153.00

sprintf("%0.2f",$number);

$rounded_value = number_format($number,2);

检查number_format

您只需要数字格式函数$rounded_value = number_format($number,2);

$rounded_value = number_format($number,2);

number_format($number, 2, '.', '')

来自PHP手册，这是以下问题的重要资源：http://php.net/manual/en/function.number-format.php