IV. BCMath Arbitrary Precision Mathematics Functions

бБЕДЕМХЕ

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

рПЕАНБЮМХЪ

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

сЯРЮМНБЙЮ

In PHP 4, 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.

бЕПЯХЪ PHP ДКЪ Windows ХЛЕЕР БЯРПНЕММСЧ ОНДДЕПФЙС ДЮММНЦН ПЮЯЬХПЕМХЪ. щРН НГМЮВЮЕР, ВРН ДКЪ ХЯОНКЭГНБЮМХЪ ДЮММШУ ТСМЙЖХИ МЕ РПЕАСЕРЯЪ ГЮЦПСГЙЮ МХЙЮЙХУ ДНОНКМХРЕКЭМШУ ПЮЯЬХПЕМХИ.

мЮЯРПНИЙЮ БН БПЕЛЪ БШОНКМЕМХЪ

оНБЕДЕМХЕ ЩРХУ ТСМЙЖХИ ГЮБХЯХР НР СЯРЮМНБНЙ Б php.ini.

Таблица 1. BC math configuration options

NameDefaultChangeable
bcmath.scale0PHP_INI_ALL
For further details and definition of the PHP_INI_* constants see ini_set().

йПЮРЙНЕ ПЮГЗЪЯМЕМХЕ ЙНМТХЦСПЮЖХНММШУ ДХПЕЙРХБ.

bcmath.scale integer

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

рХОШ ПЕЯСПЯНБ

дЮММНЕ ПЮЯЬХПЕМХЕ МЕ НОПЕДЕКЪЕР МХЙЮЙХЕ РХОШ ПЕЯСПЯНБ.

оПЕДНОПЕДЕКЕММШЕ ЙНМЯРЮМРШ

дЮММНЕ ПЮЯЬХПЕМХЕ МЕ НОПЕДЕКЪЕР МХЙЮЙХЕ ЙНМЯРЮМРШ.

Содержание
bcadd -- Add two arbitrary precision numbers
bccomp -- Compare two arbitrary precision numbers
bcdiv -- Divide two arbitrary precision numbers
bcmod --  Get modulus of an arbitrary precision number
bcmul -- Multiply two arbitrary precision number
bcpow --  Raise an arbitrary precision number to another
bcpowmod --  Raise an arbitrary precision number to another, reduced by a specified modulus.
bcscale --  Set default scale parameter for all bc math functions
bcsqrt --  Get the square root of an arbitrary precision number
bcsub --  Subtract one arbitrary precision number from another

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