Checks whether a float is infinite
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    is_infinite

    (PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

    is_infinite — Checks whether a float is infinite

    Description

    is_infinite(float $num): bool

    Returns whether the given num is either INF or -INF.

    Parameters

    num

    The float to check

    Return Values

    true if num is either INF or -INF, else false.

    Examples

    Example #1 is_infinite() example

    <?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:

    float(INF)
bool(true)
float(-INF)
bool(true)

    See Also