PHP array_search for multi dimensional array and return key

Question

I\'m trying to search for a value in a multi dimensional array (below is only a part of the big array) and get the key for that value but I can\'t manage it by myself. Here is w

Answer 1

PHP code demo

<?php
$array=Array
(
    0=>   Array
        (
            0=>   "SMEG - 30",
            1=>   "ALES",
            2=>   "-",
            3=>   "-",
            4=>   "-",
            5=>   "ALES",
            6=>   "44-",
            7=>   "-",
            8=>   "FR*S30*E36*1*1",
            9=>   "FR*S30*E36*1*1",
            10=>   "US*S30",
            11=>   "Oui",
            12=>   "3376",
            13=>   "Normale",
            14=>   "-"
        ),

    1=>   Array
        (
            0=>   "SMEG - 30",
            1=>   "ALES",
            2=>   "-",
            3=>   "Chemin Des Sports",
            4=>   "-",
            5=>   "ALES",
            6=>   "-",
            7=>   "-",
            8=>   "FR*S30*E37*2*1",
            9=>   "FR*S30*E37*2*1",
            10=>   "FR*S30",
            11=>   "Oui",
            12=>   "33762",
            13=>   "Normale",
            14=>   "-",
        ),

    2=>   Array
        (
            0=>   "SMEG - 30",
            1=>   "ALES",
            2=>   "0",
            3=>   "Ecole Des Mines",
            4=>   "-",
            5=>   "ALES",
            6=>   "4-",
            7=>   "-",
            8=>   "FR*S30*E38*2*1",
            9=>   "FR*S30*E38*2*1",
            10=>   "FR*S30",
            11=>   "Oui",
            12=>   "3376",
            13=>   "Normale",
            14=>   "-",
        )
);
$requiredKey=null;
$requiredValue=null;
finder($array,"FR*S30*E37*2*1");
function finder($array,$search)
{
    global $requiredKey,$requiredValue;
    foreach($array as $key => $value)
    {
        if(in_array($search, $value))
        {
            $requiredKey=$key;
            $requiredValue=$search;
            break;
        }
    }
}
echo $requiredKey;
echo $requiredValue;

Answer 2

Try this function for recursive searching:

function array_search_recursive($needle, array $haystack)
    {
        foreach ($haystack as $key => $value) {
            $current_key = $key;

            if ($needle === $value or (is_array($value) && array_search_recursive($needle, $value) !== false)) {
                return $current_key;
            }
        }
        return false;
    }

$key = array_search_recursive("FR*S30*E37*2*1", $data);

Answer 3

If you don't need to key, you could use array_filter

$result = array_filter($data, function($item) use ($search) {
    return $item[8] == $search;
})[0];

If you need the key, you could modify it like this

$key = false;
$result = array_filter($data, function($item, $k) use ($search, &$key) {
    if ($item[8] == $search) {
        $key = $k;
        return true;
    }
    return false;
}, ARRAY_FILTER_USE_BOTH)[0];

To handle cases, where no result is found, you have to skip the [0] party and test if count($result) != 0