PHP で foreach を使用して、特定のインデックスでネストされた配列にアクセスする方法

<code class="php">array(
    [0] => array(
        [0] => one
        [1] => array(
            [0] => 1
            [1] => 2
            [2] => 3
            )
        )

    [1] => array(
        [0] => two
        [1] => array(
            [0] => 4
            [1] => 5
            [2] => 6
            )
        )

    [2] => array(
        [0] => three
        [1] => array(
            [0] => 7
            [1] => 8
            [2] => 9
            )
        )
    )
);</code>

<code class="php">foreach ($tmpArray as $innerArray) {
    if (is_array($innerArray)) {
        foreach ($innerArray as $value) {
            echo $value;
        }
    } else {
        echo $innerArray;
    }
}</code>

<code class="php">function displayArrayRecursively($arr, $indent='') {
    if ($arr) {
        foreach ($arr as $value) {
            if (is_array($value)) {
                displayArrayRecursively($value, $indent . '--');
            } else {
                echo "$indent $value \n";
            }
        }
    }
}

$tmpArray = array(
    array("one", array(1, 2, 3)),
    array("two", array(4, 5, 6)),
    array("three", array(7, 8, 9))
);

displayArrayRecursively($tmpArray);</code>

<code class="php">foreach ($tmpArray as $inner) {
    if (is_array($inner)) {
        foreach ($inner[1] as $value) {
            echo "$value \n";
        }
    }
}</code>