Math
PHP Manual

is_finite

(PHP 4 >= 4.2.0, PHP 5)

is_finite — Finds whether a value is a legal finite number

Описание

bool is_finite ( float $val )

Checks whether val is a legal finite on this platform.

Список параметров

val

The value to check

Возвращаемые значения

TRUE if val is a legal finite number within the allowed range for a PHP float on this platform, else FALSE.

Смотрите также


Math
PHP Manual