次元削減、深さ、多次元配列の親キーの取得に関する質問

配列があります。その構造は次のとおりです:

$json = '[{"id":27,"children":[{"id":28,"children":[{"id":30},{"id":29}]}]},{"id":31},{"id":32}]';$arry = json_decode($json,true);

次のような構造になる可能性もあります:

$json = '[{"id":27,"children":[{"id":30,"children":[{"id":31}]}]},{"id":28,"children":[{"id":29}]},{"id":32}]';$arry = json_decode($json,true);

つまり、レイヤーの数と順序は固定されていません。
それを 1 次元配列に縮小し、各 1 次元配列の深さ、対応する親キーなどを記録したいと思います。

2 番目の配列の期待される結果は次のとおりです:

Array ([0] => Array ( [id] => 27 [level] => 0 [parent] => 0 )[1] => Array ( [id] => 30 [level] => 1 [parent] => 27 )[2] => Array ( [id] => 31 [level] => 2 [parent] => 30 )[3] => Array ( [id] => 28 [level] => 0 [parent] => 0 )[4] => Array ( [id] => 29 [level] => 1 [parent] => 28 )[5] => Array ( [id] => 32 [level] => 0 [parent] => 0 ) )

I have一晩中それについて考えていました。 。 。助けてください

ディスカッションに返信（解決策）

$json = '[{"id":27,"children":[{"id":30,"children":[{"id":31}]}]},{"id":28,"children":[{"id":29}]},{"id":32}]';$arry = json_decode($json,true);print_r(foo($arry));function foo($ar, $level=0, $parent=0, &$res=array()) {  foreach($ar as $v) {    $t = array();    $v['level'] = $level;    $v['parent'] = $parent;    if(isset($v['children'])) {      $t = $v['children'];      unset($v['children']);    }    $res[] = $v;    if($t) foo($t, $level+1, $v['id'], $res);  }  return $res;}

Array(    [0] => Array        (            [id] => 27            [level] => 0            [parent] => 0        )    [1] => Array        (            [id] => 30            [level] => 1            [parent] => 27        )    [2] => Array        (            [id] => 31            [level] => 2            [parent] => 30        )    [3] => Array        (            [id] => 28            [level] => 0            [parent] => 0        )    [4] => Array        (            [id] => 29            [level] => 1            [parent] => 28        )    [5] => Array        (            [id] => 32            [level] => 0            [parent] => 0        ))

$json = '[{"id":27,"children":[{"id":30,"children":[{"id":31}]}]},{"id":28,"children":[{"id":29}]},{"id":32}]';$arry = json_decode($json,true);print_r(foo($arry));function foo($ar, $level=0, $parent=0, &$res=array()) {  foreach($ar as $v) {    $t = array();    $v['level'] = $level;    $v['parent'] = $parent;    if(isset($v['children'])) {      $t = $v['children'];      unset($v['children']);    }    $res[] = $v;    if($t) foo($t, $level+1, $v['id'], $res);  }  return $res;}

Array(    [0] => Array        (            [id] => 27            [level] => 0            [parent] => 0        )    [1] => Array        (            [id] => 30            [level] => 1            [parent] => 27        )    [2] => Array        (            [id] => 31            [level] => 2            [parent] => 30        )    [3] => Array        (            [id] => 28            [level] => 0            [parent] => 0        )    [4] => Array        (            [id] => 29            [level] => 1            [parent] => 28        )    [5] => Array        (            [id] => 32            [level] => 0            [parent] => 0        ))

ああ！ ！ ！ ！
ありがとうございます！
うーん
この手順が本当にわかりません。