php - 显示一个数字到小数点后两位(Show a number to two decimal places)

Question

What's the correct way to round a PHP string to two decimal places?

(将PHP字符串四舍五入到小数点后两位的正确方法是什么？)

$number = "520"; // It's a string from a database

$formatted_number = round_to_2dp($number);

echo $formatted_number;

The output should be 520.00 ;

(输出应为520.00 ;)

How should the round_to_2dp() function definition be?

(round_to_2dp()函数定义应该如何？)

  ask by Rich Bradshaw translate from so

Answer 1

You can use number_format() :

(您可以使用number_format（） ：)

return number_format((float)$number, 2, '.', '');

Example:

(例：)

$foo = "105";
echo number_format((float)$foo, 2, '.', '');  // Outputs -> 105.00

This function returns a string .

(该函数返回一个字符串 。)