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静的変数の動的呼出し

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TL;DR

下書きが埋まったので小ネタ解放。
動的にコード(可変変数)を呼び出したい。

setting.php
class Setting {
  public static $testNumber = array(
    "1" => "1",
    "3" => "2",
    "3" => "3",
    "4" => "4",
    "5" => "5",
  );
}

$className = "Setting";
$name = "test";
$myVarious = $name."Number";
$className::${$myVarious}[3];// 3

ことの詳細はあいまいさの回避。
$$myVarious[3]だと、$myVarious[3]が変数なのか$myVariousが変数で添え字が[3]なのかが判断できないのでエラーが起こる。
なのでそこを{}でくくり $myVariousが変数である事を教えてやる。

可変変数

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