Question

Suppose I have first array, $aAllCities as

Array
(
   [21] => London
   [9]  => Paris
   [17] => New York
   [3]  => Tokyo
   [25] => Shanghai
   [11] => Dubai
   [37] => Mumbai
)

And another array, $aNotSupportedCities as

Array
(
   [0] => 37
   [1] => 25
   [2] => 11
)

Is it possible to get an array like this ?

Array
(
   [21] => London
   [9]  => Paris
   [17] => New York
   [3]  => Tokyo
)

I want to remove array values of those keys that are present in other array

Answer 1

Try this:

$aAllCities = array_flip( $aAllCities );
$aAllCities = array_diff( $aAllCities, $aNotSupportedCities );
$aAllCities = array_flip( $aAllCities );

Hope this helps.