[难]在smarty模板中,下面的语句可能是什么意思?

$arr = array("a"=>array(1,2,3),"b"=>array("c"=>array("d"=>array("e"=>"Tom","f"=>"BeiJing"))));

$smarty->assign("A",$arr);

$smarty->display("testTwo.html");

<!--testTwo.html-->



{$A['b'].c['d'].e}

<!-- 输出Tom -->

<?php

$arr = array(

	'A[a]'=>array('C[d]'=>array('e'=>'hello world')),

);

print_r($arr);

print_r($arr['A[a]']);