PHP Infinity Is Reachable¶

<?php

var_dump(is_infinite(log(0)));
// true
var_dump(1 > log(0));
// true

Infinite values are sometimes returned by PHP functions, such as log(0) or exp(PHP_INT_MAX). In these cases, beware and do not compare it directly with an integer as a positive is considered bigger than infinite. It is recommended to use the function is_finite.

See Also¶

is_infinite() (PHP manual)
beyond infinity [Try me]

PHP Features¶

math
integer

Last updated: 14 July 2026