PHP: is_infinite - Manual

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

is_infinite — Checks whether a float is infinite

Description

function is_infinite(float $num): bool

Parameters

num

The float to check

Examples

<?php
$inf = 1e308 * 2;

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

$negative_inf = -$inf;

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

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

See Also

• is_finite() - Checks whether a float is finite
• is_nan() - Checks whether a float is NAN