is_finite

Function • Params and return types changed in PHP 8.0

Checks whether a float is finite.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2

PHP 8.3

PHP 8.4

PHP 8.5

`is_finite` Function synopsis

is_finite(float $num): bool

Parameters

`$num`

Typefloat

The float to check

Return value

Typebool

true if $num is none of NAN, INF, -INF, else false.

Changes to the `is_finite` Function

PHP 8.0

Return type added: bool
Parameter name of parameter #1 changed: $val to $num
Parameter type added for parameter #1 ($num): float

- is_finite($val)
+ is_finite(float $num): bool

`is_finite` Function Availability

PHP Version	Availability
PHP 8.5Future Release	Yes
PHP 8.4Upcoming Release	Yes
PHP 8.3Supported (Latest)	Yes
PHP 8.2Supported	Yes
PHP 8.1Security-Fixes Only	Yes
PHP 8.0Unsupported	Yes
PHP 7.4Unsupported	Yes
PHP 7.3Unsupported	Yes
PHP 7.2Unsupported	Yes
PHP 7.1Unsupported	Yes
PHP 7.0Unsupported	Yes
PHP 5.6Unsupported	Yes
PHP 5.5Unsupported	Yes
PHP 5.4Unsupported	Yes
PHP 5.3Unsupported	Yes