Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

BC math configuration options

Name	Default	Changeable	Changelog
bcmath.scale	"0"	PHP_INI_ALL

For further details and definitions of the PHP_INI_* constants, see the php.ini directives.

Here's a short explanation of the configuration directives.

bcmath.scale integer

Number of decimal digits for all bcmath functions. See also bcscale().