is_infinite
Description
The is_infinite of Math for PHP checks whether a float is infinite.
Syntax
is_infinite( float $num ): bool
Parameters
num
The float to check
Return
true if num is either INF or -INF, else false.
Examples
1 · num · 0
<? $num = 0; $return = is_infinite($num); var_export($return);
false
2 · num · -INF
<? $num = -INF; $return = is_infinite($num); var_export($return);
true
3 · num · INF
<? $num = INF; $return = is_infinite($num); var_export($return);
true
4 · num · NAN
<? $num = NAN; $return = is_infinite($num); var_export($return);
false