Question 252885 in PHP Question posted in
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Find consecutive occurrences in multidimensional array php

Array
(
    [0] => Array
        (
            [0] => OLAO01
            [1] => OLAO01
            [2] => BARR04
            [3] => OLAO01
            [4] => MADD03
        )

    [1] => Array
        (
            [0] => BARR04
            [1] => POWE03
        )

    [2] => Array
        (
            [0] => BARR04
            [1] => COLL09
        )

    [3] => Array
        (
            [0] => BARR04
            [1] => SARC01
            [2] => OLAO01
        )

    [4] => Array
        (
            [0] => BARR04
            [1] => HORS02
        )

    [5] => Array
        (
            [0] => BARR04
        )

    [6] => Array
        (
            [0] => OLAO01
        )

    [7] => Array
        (
            [0] => RYDE02
        )

    [9] => Array
        (
            [0] => CAMP02
        )

    [10] => Array
        (
            [0] => WRIG05
            [1] => CAMP02
            [2] => LEMO01
        )

    [11] => Array
        (
            [0] => OLAO01
        )

    [12] => Array
        (
            [0] => HIPP01
            [1] => LEMO01
        )
)

I have array like this I needs to find if how many time one value repeating consecutive BARR04

Repeated 6 times. But if one array not that value then for that counter it will set to 1 again

$result = array_intersect($newary[$i], $newary[$i+1]);

I tried with this but not working properly

Tags:

2

Answers


  1. 0

    Just iterate through the subarrays and keep track of the consecutive occurrences of "BARR04":

    $arr = [
    ["OLAO01", "OLAO01", "BARR04", "OLAO01", "MADD03"],
    ["BARR04", "POWE03"],
    ["BARR04", "COLL09"],
    ["BARR04", "SARC01", "OLAO01"],
    ["BARR04", "HORS02"],
    ["BARR04"],
    ["OLAO01"],
    ["RYDE02"],
    ["CAMP02"],
    ["WRIG05", "CAMP02", "LEMO01"],
    ["OLAO01"],
    ["HIPP01", "LEMO01"]
];

$target = "BARR04";
$consecutiveCount = 0;
$maxConsecutiveCount = 0;

foreach ($arr as $subarr) {
    if (in_array($target, $subarr)) {
        // if the value is present in the subarray, update the count
        $consecutiveCount++;
        if ($consecutiveCount > $maxConsecutiveCount) {
            $maxConsecutiveCount = $consecutiveCount;
        }
    } else {
        // if the value is not present the streak is broken and you reset the count
        $consecutiveCount = 0;
    }
}

echo "The value '$target' repeats consecutively $maxConsecutiveCount times.";
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  2. 0

    You can flatten the array and count how many times a value occurs. Like this:

    $array = [
    ["OLAO01", "OLAO01", "BARR04", "OLAO01", "MADD03"],
    ["BARR04", "POWE03"],
    ["BARR04", "COLL09"],
    ["BARR04", "SARC01", "OLAO01"],
    ["BARR04", "HORS02"],
    ["BARR04"],
    ["OLAO01"],
    ["RYDE02"],
    ["CAMP02"],
    ["WRIG05", "CAMP02", "LEMO01"],
    ["OLAO01"],
    ["HIPP01", "LEMO01"]
];

function getValueCount($array, $value){
    $flattened = array_merge(...$array);
    $count = array_count_values($flattened);
    return $count[$value] ?? 0;
}

    Use like this:

    echo getValueCount($array, "BARR04");
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