number_format() enables us to determine the precision we require using a second argument: an integer.

 
<?php
print number_format (100000.56, 2 );

print number_format(100000.56, 4 );

?>

1.	Format an integer and a floating-point value with the number_format() function.
2.	Formatting Numbers As Text
3.	number_format for English format and Italian format
4.	number_format($n, $p, $t, $d) rounds $n to $p decimal places, using $t as the thousands separator and $d as the decimal separator.
5.	number_format($n,$p) rounds $n to $p decimal places, adding commas between thousands
6.	number_format: the second parameter indicates the number of decimals after the decimal point
7.	Printing a formatted number

number_format() enables us to determine the precision we require using a second argument: an integer. : number_format « Data Type « PHP