PHP Manualen
forrige |  | næste

# V. BCMath Arbitrary Precision Mathematics Functions

# Introduktion

For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings.

# Systemkrav

Since PHP 4.0.4, libbcmath is bundled with PHP. You don't need any external libraries for this extension.

# Installation

These functions are only available if PHP was configured with --enable-bcmath. In PHP 3, these functions are only available if PHP was not configured with --disable-bcmath.

Windows versionen af PHP har indbygget support for denne udvidelse. Du behøver ikke indsætte ekstra udvidelser for at bruge disse funktioner.

# Runtime Konfiguration

Virkemåden af disse funktioner er berørt af indstillinger i `php.ini`.

Tabel 1. BC math configuration options

Name | Default | Changeable | Changelog
--- | --- | --- | ---
bcmath.scale | "0" | PHP_INI_ALL | Available since PHP 5.0.0.

For flere detaljer og definationer af PHP_INI_* constanterne, se ini_set() dokumentation.

Her er en kort forklaring på konfigurations-direktiverne.

bcmath.scale integer

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

# Ressourcetyper

Denne udvidelse har ingen ressourcetyper defineret.

# Foruddefinerede Konstanter

Denne udvidelse har ingen konstanter.

forrige | hjem | næste
aspell_suggest | op | bcadd