is_infinite
PHP function
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(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
Checks whether a float is infinite
Description
is_infinite(float $num): bool
Returns whether the given num is either INF or -INF.
Parameters
numThe Float to check
Return Values
true if num is either INF or -INF, else false.
Examples
is_infinite() example
php
<?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:
output
float(INF)
bool(true)
float(-INF)
bool(true)