1--TEST-- 2Bug #28228 (number_format() does not allow empty decimal separator) 3--FILE-- 4<?php 5echo number_format(1234.5678, 4, '', '') . "\n"; 6echo number_format(1234.5678, 4, NULL, ',') . "\n"; 7echo number_format(1234.5678, 4, 0, ',') . "\n"; 8echo number_format(1234.5678, 4); 9?> 10--EXPECT-- 1112345678 121,234.5678 131,23405678 141,234.5678 15