php arrays

<?php

$data = array(
    array("1" => "12306"),
    array("0" => "12106"),
    array("1" => "12770"),
    array("3" => "12770"),
    array("3" => "12306"),
    array("3" => "12770")
);

$v = array_reverse(array_values($data));

$newdata = array();

foreach($data as $key => $value)
{
    $newdata[][current($value)] = key($value);
}

$result = array();
$ii = 0;

foreach($data as $key => $value)
{
    $i = 0;
    $match = array();
    $current = key($value);
    echo 'For key #'. $current . " in ".'$data['."$ii".']'. " with value " . current($value) . "\n\n";
    echo "KEY\tVALUE1\tVALUE2\tCOMPARE\n";
    foreach($newdata as $ki => $vi)
    {
        $key = key($vi);
        echo '#'. current($vi) . "\t " . $key . "\t ";
        if(in_array($key, $value) && $key == current($value))
        {
            # if there are equal cases (same key, same value) these are overwritten,
            # so if you get 3 matches then you see only those which are different by key,
            # to me it seems to fit with the request...

            $match[current($vi)] = $key;
            echo $key;
        }

        else
        {
            echo 'n/f'; # not found
        }

        if($key == current($value))
        {
            $i++;
            echo "\t";
            switch(true)
            {
                case current($vi) > $current:
                    echo "+";
                    break;
                case current($vi) == $current:
                    echo "=";
                    break;
                case current($vi) < $current:
                    echo "-";
                    break;
            }

        }
        echo "\n";
    }

    if($i == 1) echo "\t\t\tMatch: 1 ". json_encode($match, JSON_FORCE_OBJECT) ."\n";
    if($i > 1) echo "\t\t\tMatches: $i " . json_encode($match, JSON_FORCE_OBJECT) . "\n";

    # get max key from matches:

    $maxkey = max(array_keys($match));

    if($current == $maxkey)
    {
        echo "\t\t\t".'Chosen key: #'.$maxkey . "\n";
        $result[$ii][$maxkey] = $match[$maxkey];
    }

    else
    {
        echo "\t\t\tDiscarded\n";
    }

    echo "--------------------------------------------------------\n\n";
    $ii++;
}
echo "RESULT:\n";
print_r($result);