循环多维PHP数组

<?php
// 创建一个三维数组
$multiArray = array(
    'level1' => array(
        'level2a' => array('value1', 'value2'),
        'level2b' => array('value3', 'value4')
    ),
    'level1b' => array(
        'level2c' => array('value5', 'value6'),
        'level2d' => array('value7', 'value8')
    )
);

// 循环遍历三维数组
foreach ($multiArray as $level1Key => $level1Value) {
    echo "Level 1: " . $level1Key . "<br>";
    foreach ($level1Value as $level2Key => $level2Value) {
        echo "  Level 2: " . $level2Key . "<br>";
        foreach ($level2Value as $value) {
            echo "    Value: " . $value . "<br>";
        }
    }
}
?>

function traverseArray($array, $level = 0) {
    foreach ($array as $key => $value) {
        echo str_repeat("  ", $level) . "$key: ";
        if (is_array($value)) {
            traverseArray($value, $level + 1);
        } else {
            echo "$value<br>";
        }
    }
}

traverseArray($multiArray);