以编程方式访问PHP对象内容，即使在更深层次

Question

accessing object content within PHP works fine when you only set a single level like this:

$obj = new stdClass();
$obj->name1 = 'value1';
$param1 = 'name1';
echo $obj->$param1; // echoes values1 as expected

But what if I need deeper object content like this (w/o transforming it into an array first or similar stuff...)

$obj = new stdClass();
$obj->name1->name2 = 'value2';
$param2 = 'name1->name2';
echo $obj->$param2; // does not echo value2 obviously

How can I solve this?

Answer 1

First approach (simple):

$obj = new stdClass();
$obj->name1->name2 = 'value2';
$param1 = 'name1';
$param2 = 'name2';
echo $obj->$param1->$param2;

Second approach (more generalized):

$obj = new stdClass();
$obj->name1->name2 = 'value2';
$params = 'name1->name2';

$value = $obj;
foreach(preg_split("/-\>/",$params) as $param)
    $value = $value->$param;

echo $value;