to reproduce this, try
<?php
var_dump(is_infinite(log(0)));
is_infinite
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
is_infinite — Finds whether a value is infinite
Descrierea
is_infinite
( float
$num
) : bool
Returns true if num is infinite (positive or
negative), like the result of log(0) or any value too
big to fit into a float on this platform.
Parametri
-
num -
The value to check
Valorile întoarse
true if num is infinite, else false.
A se vedea și
- is_finite() - Finds whether a value is a legal finite number
- is_nan() - Finds whether a value is not a number
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