Array
(
[ID] => 134
[UF_RATING] =>
[UF_WORKDONE] => Array
(
)
[UF_CHECKCODE] =>
[UF_IWEB_SMS_PASSWORD] =>
[UF_ABOUT_UPDATE] =>
)
if(isset($_user["UF_RATING"]) && !isset($_user["UF_RATING"]["TOTAL"]["PLACE"]))
{
}
isset($_user["UF_RATING"]["TOTAL"]["PLACE"])
возвращает true, а isset($_user["UF_RATING"])
возвращает false.