Recursive array_search

Question

I have a multi-dimensional array:

$categories = array(
    array(
        \'CategoryID\' => 14308,
        \'CategoryLevel\' => 1,
        \'CategoryNa         


        

Answer 1

public static function unique(array $data, $key){
    $rez = [];
    foreach($data as $val){
        if(!isset($val[$key]) && is_array($val)){
            return self::unique($val, $key);
        }elseif( isset($val[$key]) ){
            $rez[] = $val[$key];
        }
    }
    return array_unique($rez);
}

Answer 2

You can change your recursive function like this, which should give you the solution:

function recursive_array_search($needle, $haystack, $currentKey = '') {
    foreach($haystack as $key=>$value) {
        if (is_array($value)) {
            $nextKey = recursive_array_search($needle,$value, $currentKey . '[' . $key . ']');
            if ($nextKey) {
                return $nextKey;
            }
        }
        else if($value==$needle) {
            return is_numeric($key) ? $currentKey . '[' .$key . ']' : $currentKey . '["' .$key . '"]';
        }
    }
    return false;
}

This will result in

[1][1][0]["CategoryID"]

Since CategoryID is also a key in your multidimensional array.

If you don't want this, you can adapt the function to

function recursive_array_search($needle, $haystack, $currentKey = '') {
    foreach($haystack as $key=>$value) {
        if (is_array($value)) {
            $nextKey = recursive_array_search($needle,$value, $currentKey . '[' . $key . ']');
            if ($nextKey) {
                return $nextKey;
            }
        }
        else if($value==$needle) {
            return is_numeric($key) ? $currentKey . '[' .$key . ']' : $currentKey;
        }
    }
    return false;
}

Answer 3

You are ignoring the returned value of your inner call to recursive_array_search. Don't do that.

/*
 * Searches for $needle in the multidimensional array $haystack.
 *
 * @param mixed $needle The item to search for
 * @param array $haystack The array to search
 * @return array|bool The indices of $needle in $haystack across the
 *  various dimensions. FALSE if $needle was not found.
 */
function recursive_array_search($needle,$haystack) {
    foreach($haystack as $key=>$value) {
        if($needle===$value) {
            return array($key);
        } else if (is_array($value) && $subkey = recursive_array_search($needle,$value)) {
            array_unshift($subkey, $key);
            return $subkey;
        }
    }
}

Answer 4

function array_search_recursive( $search, $values = array(), $i = 0) {
    $match = false;
    var_dump($i, $search);
    $i++;
    foreach ( $values as $keyState => $val ) {
        var_dump($val == $search, 'expression');
        if ( $val == $search ) {
            return $keyState;
        }
        if ( is_array( $val ) ) {
            $match = array_search_recursive($search, $val, $i);
        }
        if ( $match !== false ) {
            return $keyState;
        }
    }

    return false;
}

echo array_search_recursive($search, $canada)

Edit:

This will return the first key, tested for $canada = array( 'Brazilia' => 'test1', "Alberta" => [ "Airdrie", "Brooks", "Camrose" ], "British Columbia" => [ "Abbotsford" => [ 'a', 'b', 'c' ], "Armstrong", "Castlegar" ], "Manitoba" => [ "Brandon", "Selkirk" ], 'Olanda' => 'test2' ); $search = "Selkirk";