PHP自定义函数round_pad_zero 小数位四舍五入并补零

2. /**
3. * 小数位四舍五入并补零
4. * by bbs.it-home.org
5. */
6. function round_pad_zero($num, $precision)
7. {
8. if ($precision return round($num, 0);
9. }
10. $r_num = round($num, $precision);
11. $num_arr = explode('.', "$r_num");
12. if (count($num_arr) == 1) {
13. return "$r_num" . '.' . str_repeat('0', $precision);
14. }
15. $point_str = "$num_arr[1]";
16. if (strlen($point_str) $point_str = str_pad($point_str, $precision, '0');
17. }
18. return $num_arr[0] . '.' . $point_str;
19. }
20. //调用示例
21. echo round_pad_zero(3223342.506, 4);

复制代码