将PHP数组转换为JSON树

function convertArrayToJSONTree($array) {
    $result = array();
    
    foreach ($array as $key => $value) {
        $node = array();
        $node['name'] = $key;
        
        if (is_array($value)) {
            $node['children'] = convertArrayToJSONTree($value);
        } else {
            $node['value'] = $value;
        }
        
        $result[] = $node;
    }
    
    return $result;
}

// 示例用法
$array = array(
    'fruit' => array(
        'apple' => 'red',
        'banana' => 'yellow'
    ),
    'color' => 'blue'
);

$jsonTree = convertArrayToJSONTree($array);
$json = json_encode($jsonTree);

echo $json;

[
    {
        "name": "fruit",
        "children": [
            {
                "name": "apple",
                "value": "red"
            },
            {
                "name": "banana",
                "value": "yellow"
            }
        ]
    },
    {
        "name": "color",
        "value": "blue"
    }
]