Multidimensional array judgment

CITY[X] [y]
x Save the ID of the Save
Y Save the ID of the city in X province
If there is no data under city[x]
Indicates that the province is empty and can be deleted
Otherwise, how can we not solve?

Reply to discussion (solution)

Count (city[x]) = = 0

Count (city[x]) = = 0

Is this a statement that can be deleted? Can you write a full-scale point? Thank you

foreach ($city as $key, $item) {  if (count ($ITRM) <== 0) unset ($city [$key]);}

foreach ($city as $key, $item) {  if (count ($ITRM) <== 0) unset ($city [$key]);}

Kazakhstan is good, but I want to tell you if there's something wrong with that code, haha.

