Manußl PHP
P°edchßzejφcφDal╣φ

is_nan

(PHP 4 CVS only)

is_nan -- 

Description

bool is_nan ( float val)

Returns TRUE if val is 'not a number', like the result of acos(1.01).

P°edchßzejφcφDom∙Dal╣φ
is_infiniteNahorulcg_value