PHP array sorting problem

The following is a demo two-digit array. The number of arrays in $arr is not fixed. Want to generate results like the one below.
That is, each array in $arr is intersected and combined.

<code>$arr = array(
    array('豪华1','海边2'),
    array('狗A','狗B'),
    array('1小时','2小时','3小时')
);
</code>

Reply content:

The following is a demo two-digit array. The number of arrays in $arr is not fixed. Want to generate results like the one below.
That is, each array in $arr is intersected and combined.

<code>$arr = array(
    array('豪华1','海边2'),
    array('狗A','狗B'),
    array('1小时','2小时','3小时')
);
</code>

<code>function output($array, $lead = '')
{
    $items = current($array);
    $subArray = array_slice($array, 1);
    foreach($items as $item) {
        if ($subArray) {
            output($subArray, $lead . $item . '-');
        } else {
            echo $lead . $item . '\n';
        }
    }
}
</code>

Why does Dog A appear repeatedly?