消除空值嵌套数组php

function removeEmptyValues($array) {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            $array[$key] = removeEmptyValues($value);
        }
        if (empty($array[$key])) {
            unset($array[$key]);
        }
    }
    return $array;
}

// 示例用法
$array = array(
    'key1' => 'value1',
    'key2' => array(
        'key3' => '',
        'key4' => array(),
        'key5' => 'value2'
    ),
    'key6' => ''
);

$result = removeEmptyValues($array);
print_r($result);

Array
(
    [key1] => value1
    [key2] => Array
        (
            [key5] => value2
        )
)