How to output numbers with two decimal places in PHP

When we need to keep the output data to two decimal places, what should we do? Today I will introduce to you how to format a number with two decimal places in PHP. You can refer to it if you need it.

Due to business needs, a number needs to be formatted to two decimal places (rounded):

The first option: round

Code:

$aaa = 15.0393;
var_dump(round($aaa, 2));
$bbb = 16.1;
var_dump(round($bbb, 2));
$ccc = 13;
var_dump(round($ccc, 2));
/**
运行：
double(15.04)
double(16.1)
double(13)
 */

There is a problem with this solution. If the original number has only one decimal or no decimal, it will be output as usual without adding 0 at the end. If rounding up or down, use ceil or floor.

Second solution: number_format

Code:

$aaa = 15.0393;
var_dump(number_format($aaa, 2, '.', ''));

$bbb = 16.1;
var_dump(number_format($bbb, 2, '.', ''));

$ccc = 13;
var_dump(number_format($ccc, 2, '.', ''));

/**
运行：
string(5) "15.04"
string(5) "16.10"
string(5) "13.00"
 */

Although this solution can be filled with 0 at the end, it will be converted into a string.

The third option: sprintf

Code:

$aaa = 15.0393;
var_dump(sprintf('%.2f', $aaa));

$bbb = 16.1;
var_dump(sprintf('%.2f', $bbb));

$ccc = 13;
var_dump(sprintf('%.2f', $ccc));

/**
运行：
string(5) "15.04"
string(5) "16.10"
string(5) "13.00"
 */

is the same as above.

// ToDo: There is no good solution that can add 0 at the end and output a numeric type instead of a string.

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