Question

I would like to extract the data groups from the PHP arrays depending on the “RouterName”.
So, in the end, I will get 4 Big Arrays (ArrDeviceA, ArrDeviceB, etc.)

I don’t want to use foreach and loop every rows and put into the separate array. Moreover, there might be the chance that some arrays might contain more than 3 rows. The number of rows are not constant.

Is there any function to query the array in PHP?

The raw data of php array are as follow:

Array
(
    [0] => Array
        (
            [RouterName] => DeviceA
            [Reference] => R2a
            [AverageRSSI] => -36.00
            [AverageQuality] => 63.00
            [Date_Time] => 12-June-2010
        )

    [1] => Array
        (
            [RouterName] => DeviceA
            [Reference] => R2a
            [AverageRSSI] => -51.03
            [AverageQuality] => 47.97
            [Date_Time] => 11-June-2010
        )

    [2] => Array
        (
            [RouterName] => DeviceA
            [Reference] => R2a
            [AverageRSSI] => -53.63
            [AverageQuality] => 45.37
            [Date_Time] => 10-June-2010
        )

    [3] => Array
        (
            [RouterName] => DeviceB
            [Reference] => R2
            [AverageRSSI] => -38.19
            [AverageQuality] => 60.81
            [Date_Time] => 12-June-2010
        )

    [4] => Array
        (
            [RouterName] => DeviceB
            [Reference] => R2
            [AverageRSSI] => -38.64
            [AverageQuality] => 60.36
            [Date_Time] => 11-June-2010
        )

    [5] => Array
        (
            [RouterName] => DeviceB
            [Reference] => R2
            [AverageRSSI] => -38.67
            [AverageQuality] => 60.33
            [Date_Time] => 10-June-2010
        )

    [6] => Array
        (
            [RouterName] => DeviceC
            [Reference] => SCN1010
            [AverageRSSI] => -69.12   
            [AverageQuality] => 29.88
            [Date_Time] => 12-June-2010
        )

    [7] => Array
        (
            [RouterName] => DeviceC
            [Reference] => SCN1010
            [AverageRSSI] => -70.99
            [AverageQuality] => 28.01
            [Date_Time] => 11-June-2010
        )

    [8] => Array
        (
            [RouterName] => DeviceC
            [Reference] => SCN1010
            [AverageRSSI] => -71.52
            [AverageQuality] => 27.48
            [Date_Time] => 10-June-2010
        )

    [9] => Array
        (
            [RouterName] => DeviceD
            [Reference] => SCN1020
            [AverageRSSI] => -62.48
            [AverageQuality] => 36.52
            [Date_Time] => 12-June-2010
        )

    [10] => Array
        (
            [RouterName] => DeviceD
            [Reference] => SCN1020
            [AverageRSSI] => -34.60
            [AverageQuality] => 64.40
            [Date_Time] => 11-June-2010
        )

    [11] => Array
        (
            [RouterName] => DeviceD
            [Reference] => SCN1020
            [AverageRSSI] => 0.00
            [AverageQuality] => 99.00
            [Date_Time] => 10-June-2010
        )

)

Answer 1

I don’t want to use foreach and loop every rows and put into the separate array.

Why ? That’s 4 lines of crystal clear code, and you could even save a line… Stay simple.

$indexedByRouterName = array();
foreach ($array as $key => $value) {
    $routerName = $value['RouterName'];
    $indexedByRouterName[$routerName][] = $value;
}

Having an unknown number of lines is not a problem if you use the [] operator.