PHP Data optimization

Array ([0] = = Array ([ID] [receive_id] = [Mac] = + a4:3d: 78:fc:49:50 [Staytime] = [1] = = Array ([id] = [rece        IVE_ID] [mac] = a4:3d:78:fc:49:51 [Staytime] [2] = = Array ([id] [receive_id] = [Mac] = a4:3d:78:fc:49:50 [Stayti Me] = 2443) [3] = = Array ([id] = [receive_id] = 42 [ MAC] = a4:3d:78:fc:49:50 [Staytime] = 1443) [4] = = Array ([id] + 2 4 [receive_id] [mac] = a4:3d:78:fc:49:51 [Staytime] + 1143) [             5] = = Array ([id] [receive_id] = [Mac] = a4:3d:78:fc:49:51 [Staytime] => 543)) 
For example, the above array is differentiated by Mac

Array ([a4:3d:78:fc:49:50] + = array ([id] = [receive_id] = [m]                    AC] = a4:3d:78:fc:49:50 [Staytime] = [Timmarr] + = Array ( [0] = = Array ([id] = [recei                        VE_ID] = [Mac] = a4:3d:78:fc:49:50 [Staytime] + 400 ) [1] = = Array ([id] = =                            [receive_id] [mac] = a4:3d:78:fc:49:50                            [Staytime] = 2443) [2] = = Array ( [ID] [receive_id] = [Mac] = A4:3d:78:fc:49:50                           [Staytime] = 1443))) [a4:3d:78:fc:49:51]            = = Array ([id] [[receive_id] = [Mac] = a4:3d:78:fc:49:51                        [Staytime] = [Timmarr] = = Array ([0] = = Array                            ([id] [receive_id] = 42                    [Mac] + a4:3d:78:fc:49:51 [staytime] = 200)                            [1] = = Array ([id] = 24 [receive_id] [mac] = a4:3d:78:fc:49:51 [Staytime] =&gt ; 1143) [2] = = Array ([id]              = 25              [receive_id] [mac] = a4:3d:78:fc:49:51 [s Taytime] + 543))))
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PHP Code:

$MACARR =   [];
$MACUSERARR =    [];

for ($i =0; $i < $countList; $i + +) {
    if (!in_array ($list [$i] [' mac '], $MACARR)} {
        $MACARR []   =   $list [$i] [' mac '];
        $MACUSERARR [$list [$i] [' mac ']] =   $list [$i];
        $MACUSERARR [$list [$i] ' mac ']][' Timmarr ' []  = $list [$i];
    }else{
        $MACUSERARR [$list [$i] ' mac ']][' Timmarr ' []  =   $list [$i];
    }
}
Less cycle times

PHP Data optimization