在 HTML 表格中显示嵌套数组

这是一个简单的问题，我花了几个小时试图解决。我有一个数组，其中包含几个学生的信息以及他们在测试中得分的分数。总共有 8 个主题，每个主题有 5 个参数。

该数组如下所示：

Array
(
    [Ron] => Array
        (
            [subject1] => Array
                (
                    [test1] => 47
                    [test2] => 86
                    [total] => 133
                    [percentage] => 88.67
                    [status] => Pass
                )
            [pass_count] => 8
            [fail_count] => 0
            [gross_total] => 963
            [gross_percentage] => 80.25

            [...]

            [subject8] => Array
                (
                    [test1] => 48
                    [test2] => 86
                    [total] => 134
                    [percentage] => 89.33
                    [status] => Pass
                )

            [pass_count] => 8
            [fail_count] => 0
            [gross_total] => 900
            [gross_percentage] => 75.50
        )

    [John] => Array
        (
            [subject1] => Array
                (
                    [test1] => 39
                    [test2] => 72
                    [total] => 111
                    [percentage] => 74
                    [status] => Pass
                )
            [pass_count] => 8
            [fail_count] => 0
            [gross_total] => 963
            [gross_percentage] => 80.25

            [...]                

            [subject8] => Array
                (
                    [test1] => 39
                    [test2] => 75
                    [total] => 114
                    [percentage] => 76
                    [status] => Pass
                )

            [pass_count] => 8
            [fail_count] => 0
            [gross_total] => 846
            [gross_percentage] => 70.5
        )

)

我需要在格式良好的 HTML 表格中显示以下内容（我计划使用 Bootstrap），但我无法弄清楚如何正确嵌套表格使用PHP.

这是我目前拥有的 HTML 标记：http://jsfiddle.net/9y910uvp/ http://jsfiddle.net/9y910uvp/

这给出了以下结果：

这没关系。

实际问题

我正在使用 PHP 来显示数组中的内容。我很困惑如何显示嵌套的值<tr> and <td>部分。

如何循环遍历数组并正确显示内容？ （到目前为止，我会发布我的尝试，但它们都很愚蠢并且不起作用，所以我不会发布）。

一个例子将不胜感激，因为我花了无数的时间试图让它工作，但失败了。

输出不完全相同，但这是一种递归方法，可以处理任何深度的嵌套数组......

<?php

$data = Array (
    "Ron" => Array (
            "subject1" => Array (
               "tests" => Array (
                    "test1" => 47,
                    "test2" => 86,
                    "total" => 133,
                    "percentage" => 88.67,
                    "status" => "Pass",
                ),
                "pass_count" => 8,
                "fail_count" => 0,
                "gross_total" => 963,
                "gross_percentage" => 80.25,
            ),


            "subject8" => Array (
               "tests" => Array (
                    "test1" => 48,
                    "test2" => 86,
                    "total" => 134,
                    "percentage" => 89.33,
                    "status" => "Pass",
                ),
                "pass_count" => 8,
                "fail_count" => 0,
                "gross_total" => 900,
                "gross_percentage" => 75.50,

             ),
    ),

    "John" => Array (
            "subject1" => Array (  
               "tests" => Array (
                    "test1" => 39,
                    "test2" => 72,
                    "total" => 111,
                    "percentage" => 74,
                    "status" => "Pass",
                ),
                "pass_count" => 8,
                "fail_count" => 0,
                "gross_total" => 963,
                "gross_percentage" => 80.25,

            ),

            "subject8" => Array (
                "tests" => Array (
                    "test1" => 39,
                    "test2" => 75,
                    "total" => 114,
                    "percentage" => 76,
                    "status" => "Pass",

                ),
                "pass_count" => 8,
                "fail_count" => 0,
                "gross_total" => 846,
                "gross_percentage" => 70.5,
            ),
        ),
);


print_r($data);
$table = table_cell($data);
echo $table;


function table_cell($data) {

  $return = "<table border='1'>";
  foreach ($data as $key => $value) {
    $return .= "<tr><td>$key</td><td>";
    if (is_array($value)) {
        $return .= table_cell($value);
    } else {
        $return .= $value;
    }
    $return .= "</td><tr>";
  }
  $return .= "</tr></table>";
  return($return);

}

桌子看起来与要求的完全不一样，但是......这是一个有趣的练习......