Php 动态数组键入while循环

我正在努力让它工作：

我有一个数组，每个循环都“更深”。我需要在最深的“children”键中添加一个新数组

while($row = mysql_fetch_assoc($res)) {
    array_push($json["children"],
                        array(
                            "id" => "$x",
                            "name" => "Start",
                            "children" => array()
                        )
                    );
}

因此，在一个循环中，它将是：

array_push($json["children"] ...
array_push($json["children"][0]["children"] ...
array_push($json["children"][0]["children"][0]["children"] ...

。。。等等你知道如何让按键选择器像这样动态吗

$selector = "[children][0][children][0][children]";
array_push($json$selector);

---

Hmmm-最好通过引用指定：

$children =& $json["children"];
while($row = mysql_fetch_assoc($res)) {
    array_push($children,
        array(
            "id" => "$x",
            "name" => "Start",
            "children" => array()
        )
    );
    $children =& $children[0]['children'];
}

---

Hmmm-最好通过引用指定：

$children =& $json["children"];
while($row = mysql_fetch_assoc($res)) {
    array_push($children,
        array(
            "id" => "$x",
            "name" => "Start",
            "children" => array()
        )
    );
    $children =& $children[0]['children'];
}

如果要通过字符串路径读取数组，请将字符串拆分为索引，然后可以执行类似操作来获取值

function f($arr, $indices) {
    foreach ($indices as $key) {
        if (!isset($arr[$key])) {
            return null;
        }
        $arr = $arr[$key];
    }
    return $arr;
}

如果要通过字符串路径读取数组，请将字符串拆分为索引，然后可以执行类似操作来获取值

function f($arr, $indices) {
    foreach ($indices as $key) {
        if (!isset($arr[$key])) {
            return null;
        }
        $arr = $arr[$key];
    }
    return $arr;
}