is_finite

Checks whether a float is finite

Description

bool is_finite(float $num)

Returns whether the given num is a finite float.

A finite float is neither NAN (is_nan), nor infinite (is_infinite).

Parameters

num: The float to check

Return Values

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

Examples

Example #1 is_finite example

<?php
$float = 1.2345;
var_dump($float, is_finite($float));

$nan = sqrt(-1);
var_dump($nan, is_finite($nan));

$inf = 1e308 * 2;
var_dump($inf, is_finite($inf));
?>

The above example will output:

float(1.2345)
bool(true)
float(NAN)
bool(false)
float(INF)
bool(false)

See Also

is_infinite
is_nan