php round()不足补零
更新于
2021-12-09 14:21
307
function round_pad_zero($num, $precision){if ($precision < 1) {return round($num, 0);}$r_num = round($num, $precision);$num_arr = explode('.', "$r_num");if (count($num_arr) == 1) {return "$r_num" . '.' . str_repeat('0', $precision);}$point_str = "$num_arr[1]";if (strlen($point_str) < $precision) {$point_str = str_pad($point_str, $precision, '0');}return $num_arr[0] . '.' . $point_str;}var_dump(round_pad_zero(0.6,3));// 结果：string(5) "0.600"
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