I have defined constant in codeigniter constants.php file.
defined('DECIMAL_POINT') or define('DECIMAL_POINT','2');
And using it to format number as below example.
$number=1000000;
$amount = number_format($number,DECIMAL_POINT, '.', '');
echo $amount;
Output is: 1000000.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
The output should be 1000000.00;
It was working fine before I updated my PHP version to 8.2.8
As noted by CBroe in a comment, DECIMAL_POINT is a reserved constant in PHP 8.2.0+, and it has a value that you don't expect.
One solution to avoid this issue is to define your own constant and add a prefix, so that the risk of PHP adding a constant with this name in a future version is lowered:
define('APP_DECIMAL_POINT', 2);
I didn't use defined('APP_DECIMAL_POINT') or define('APP_DECIMAL_POINT','2'); because it's better to have an error if our code try to redefine an existing constant, than silently declaring the constant with a value that can be totally different.
Then you can use:
$number = 1000000;
$amount = number_format($number, DECIMAL_POINT, '.', '');
echo $amount;