PHP 忒聊 綴豖 ヶ輛 is_null (PHP 4 = 4.0.4) Description Returns TRUE if var is null, FALSE otherwise. See the NULL type when a variable is considered to be NULL and when not. See also NULL, is_bool(), is_numeric(), is_float(), is_int(), is_string(), is_object(), is_array(), is_integer(), and is_real() 綴豖 れ萸 ヶ輛 is_long 奻珨撰 is_numeric