I have mutiple arrays say for now 2, first array has Cities(Mumbai, Pune. Bangalore, Hyderabad) And 2nd array has Mumbia nad Hyderabd.

I want to sum up the values based on the Key.

Array ( [Mumbai] => Array ( [ga:pageviews] => 1 [ga:visits] => 1 [ga:newVisits] => 1 [ga:pageviewsPerVisit] => 1 [ga:entranceBounceRate] => 1 [ga:avgTimeOnSite] => 1 [ga:timeOnSite] => 1 [ga:bounces] => 1 )

[Pune] => Array
    (
        [ga:pageviews] => 2
        [ga:visits] => 2
        [ga:newVisits] => 2
        [ga:pageviewsPerVisit] => 2
        [ga:entranceBounceRate] => 2
        [ga:avgTimeOnSite] => 2
        [ga:timeOnSite] => 2
        [ga:bounces] => 2
    )

[Bangalore] => Array
    (
        [ga:pageviews] => 3
        [ga:visits] => 3
        [ga:newVisits] => 3
        [ga:pageviewsPerVisit] => 3
        [ga:entranceBounceRate] => 3
        [ga:avgTimeOnSite] => 3
        [ga:timeOnSite] => 3
        [ga:bounces] => 3
    )

[Hyderabad] => Array
    (
        [ga:pageviews] => 4
        [ga:visits] => 4
        [ga:newVisits] => 4
        [ga:pageviewsPerVisit] => 4
        [ga:entranceBounceRate] => 4
        [ga:avgTimeOnSite] => 4
        [ga:timeOnSite] => 4
        [ga:bounces] => 4
    )

)

2nd Array:

Array ( [Mumbai] => Array ( [ga:pageviews] => 5 [ga:visits] => 5 [ga:newVisits] => 5 [ga:pageviewsPerVisit] => 5 [ga:entranceBounceRate] => 5 [ga:avgTimeOnSite] => 5 [ga:timeOnSite] => 5 [ga:bounces] => 5 )

[Hyderabad] => Array
    (
        [ga:pageviews] => 2
        [ga:visits] => 2
        [ga:newVisits] => 2
        [ga:pageviewsPerVisit] => 2
        [ga:entranceBounceRate] => 2
        [ga:avgTimeOnSite] => 2
        [ga:timeOnSite] => 2
        [ga:bounces] => 2
    )

)

I want the result as:

Array ( [Mumbai] => Array ( [ga:pageviews] => 6 [ga:visits] => 6 [ga:newVisits] => 6 [ga:pageviewsPerVisit] => 6 [ga:entranceBounceRate] => 6 [ga:avgTimeOnSite] => 6 [ga:timeOnSite] => 6 [ga:bounces] => 6 )

[Pune] => Array
    (
        [ga:pageviews] => 2
        [ga:visits] => 2
        [ga:newVisits] => 2
        [ga:pageviewsPerVisit] => 2
        [ga:entranceBounceRate] => 2
        [ga:avgTimeOnSite] => 2
        [ga:timeOnSite] => 2
        [ga:bounces] => 2
    )

[Bangalore] => Array
    (
        [ga:pageviews] => 3
        [ga:visits] => 3
        [ga:newVisits] => 3
        [ga:pageviewsPerVisit] => 3
        [ga:entranceBounceRate] => 3
        [ga:avgTimeOnSite] => 3
        [ga:timeOnSite] => 3
        [ga:bounces] => 3
    )

[Hyderabad] => Array
    (
        [ga:pageviews] => 6
        [ga:visits] => 6
        [ga:newVisits] => 6
        [ga:pageviewsPerVisit] => 6
        [ga:entranceBounceRate] => 6
        [ga:avgTimeOnSite] => 6
        [ga:timeOnSite] => 6
        [ga:bounces] => 6
    )

)

Thanks for your help.... Ruth.