How can I add commas to numbers in PHP

Question

I would like to know how can I add comma\'s to numbers. To make my question simple.

I would like to change this:

1210 views

To:

Answer 1

 $number = 1234.56;

//Vietnam notation(comma for decimal point, dot for thousand separator)

 $number_format_vietnam = number_format($number, 2, ',', '.');

//1.234,56