我正在尝试构造一个深度嵌套的关联数组，但我不知道构造一个数组的规则是什么。我有这个理论数组：
-one
-two
-three
-four
-one
-two
-three
-four
-five
-six
-seven
-eight
-nine
-one
-two
-three
-one
-two
-three
-four
-five
-six
我尝试将其表示为 PHP 关联数组;
$associative = array(
'one' => 'one-1',
'two' => 'two-2',
'three' => 'three-3',
'four' => 'four-4'
(
'one' => 'one-four-1',
'two' => 'two-four-2',
'three' => 'three-four-3',
'four' => 'four-four-4'
)
'five' => 'five-5',
'six' => 'six-6',
'seven' => 'seven-7',
'eight' => 'eight-8',
'nine' => 'nine-9'
(
'one' => 'one-nine-1',
'two' => 'two-nine-2',
'three' => 'three-nine-3'
(
'one' => 'one-nine-three-1',
'two' => 'two-nine-three-2',
'three' => 'three-nine-three-3',
'four' => 'four-nine-three-4',
'five' => 'five-nine-three-5',
'six' => 'six-nine-three-6'
))
);
$keys = array_values($associative);
echo $keys[0];
当我尝试执行 php 代码段时，出现此错误;
解析错误：语法错误，意外的"（"，预期"）" C：''wamp''www''array.php 在第 7 行
所以我的问题是，编写这样一个数组的正确方法是什么，当我希望添加更多子数组时，我应该遵循什么规则？
注意：在我的理论数组中，四个有四个孩子，九个有三个孩子，三个有六个孩子。无论如何，我希望在我的虚拟数组中理解生孩子的想法。
子数组是顶级数组元素的实际值，您还必须使用 array（） 启动它们：
$associative = array(
'one' => 'one-1',
'two' => 'two-2',
'three' => 'three-3',
'four' => array(
'one' => 'one-four-1',
'two' => 'two-four-2',
'three' => 'three-four-3',
'four' => 'four-four-4'
),
'five' => 'five-5',
'six' => 'six-6',
'seven' => 'seven-7',
'eight' => 'eight-8',
'nine' => array(
'one' => 'one-nine-1',
'two' => 'two-nine-2',
'three' => array(
'one' => 'one-nine-three-1',
'two' => 'two-nine-three-2',
'three' => 'three-nine-three-3',
'four' => 'four-nine-three-4',
'five' => 'five-nine-three-5',
'six' => 'six-nine-three-6'
),
),
);
请注意，我还在每个结束)后添加了, s，因为，就像我说的，数组是父数组元素的值。
$associative = array(
'one' => 'one-1',
'two' => 'two-2',
'three' => 'three-3',
'four' => array(
'one' => 'one-four-1',
'two' => 'two-four-2',
'three' => 'three-four-3',
'four' => 'four-four-4'
),
'five' => 'five-5',
'six' => 'six-6',
'seven' => 'seven-7',
'eight' => 'eight-8',
'nine' => array(
'one' => 'one-nine-1',
'two' => 'two-nine-2',
'three' => array(
'one' => 'one-nine-three-1',
'two' => 'two-nine-three-2',
'three' => 'three-nine-three-3',
'four' => 'four-nine-three-4',
'five' => 'five-nine-three-5',
'six' => 'six-nine-three-6'
)
)
);
print_r($associative);