如何将复杂的字符串拆分为数组？

您需要将字符串拆分为一个数组。线：

routes[0][1].action.controller[0].class

大批：

array(
    [0]=> string(6) "routes",
    [1]=> string(3) "[0]",
    [2]=> string(3) "[1]",
    [3]=> string(6) "action",
    [4]=> string(10) "controller",
    [5]=> string(3) "[0]",
    [6]=> string(5) "class"
)

甚至更适合：

array(
    [0]=> string(6) "routes",
    [1]=> int(0),
    [2]=> int(1),
    [3]=> string(6) "action",
    [4]=> string(10) "controller",
    [5]=> int(0),
    [6]=> string(5) "class"
)

这是我的代码

preg_match_all(
    '/([a-z0-9_]+)(\[\d+\])*(\.|$)/', 
    'routes[0][0].action.controller[0].class', 
    $matches
);

但我明白了

array (
  0 => 
  array (
    0 => 'routes[0][1]',
    1 => 'action',
    2 => 'controller[0]',
    3 => 'class',
  ),
  1 => 
  array (
    0 => 'routes',
    1 => 'action',
    2 => 'controller',
    3 => 'class',
  ),
  2 => 
  array (
    0 => '[1]',
    1 => '',
    2 => '[0]',
    3 => '',
  ),
)