is_infinite
(PHP 4 >= 4.2.0, PHP 5)
is_infinite — Finds whether a value is infinite
Description
bool is_infinite
( float
$val
)
Returns TRUE if val is infinite (positive or
negative), like the result of log(0) or any value too
big to fit into a float on this platform.
Parameters
-
val -
The value to check
Return Values
TRUE if val is infinite, else FALSE.
See Also
- 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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Коментарии
to reproduce this, try
<?php
var_dump(is_infinite(log(0)));