PHP custom function round_pad_zero rounds decimal places and pads with zeros

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Release: 2016-07-25 08:57:46
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  1. /**
  2. * Decimal places rounded and zero padded
  3. * by bbs.it-home.org
  4. */
  5. function round_pad_zero($num, $precision)
  6. {
  7. if ($precision < 1) {
  8. 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) < $precision) {
  17. $point_str = str_pad($point_str, $precision, '0');
  18. }
  19. return $num_arr[0] . '.' . $point_str;
  20. }
  21. //调用示例
  22. echo round_pad_zero(3223342.506, 4);
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