is_infinite

Checks whether a float is infinite

Description

bool is_infinite(float $num)

Returns whether the given num is either INF or -INF.

Parameters

num: The float to check

Return Values

true if num is either INF or -INF, else false.

Examples

Example #1 is_infinite example

<?php
$inf = 1e308 * 2;

var_dump($inf, is_infinite($inf));

$negative_inf = -$inf;

var_dump($negative_inf, is_infinite($negative_inf));
?>

The above example will output:

float(INF)
bool(true)
float(-INF)
bool(true)

See Also

is_finite
is_nan