Recipe 2.10 Formatting Numbers
2.10.1 Problem
You
have a number and you want to print it with thousands and decimals
separators. For instance, you want to display prices for items in a
shopping cart.
2.10.2 Solution
Use the number_format(
)
function to format as an integer:
$number = 1234.56;
print number_format($number); // 1,235 because number is rounded up
Specify a number of decimal places to format as a decimal:
print number_format($number, 2); // 1,234.56
2.10.3 Discussion
The number_format( ) function formats a number by
inserting the correct decimal and thousands separators for your
locale. If you want to manually specify these values, pass them as
the third and fourth parameters:
$number = 1234.56;
print number_format($number, 2, '@', '#'); // 1#234@56
The third argument is used as the decimal point and the last
separates thousands. If you use these options, you must specify both
arguments.
By default, number_format( ) rounds the number to
the nearest integer. If you want to preserve the entire number, but
you don't know ahead of time how many digits follow
the decimal point in your number, use this:
$number = 1234.56; // your number
list($int, $dec) = explode('.', $number);
print number_format($number, strlen($dec));
2.10.4 See Also
Documentation on number_format( ) at
http://www.php.net/number-format.
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