我已经尝试了数小时来解决这个问题。我有一个数组，从curl结果的远程文本文件加载。它是由空格和竖线分隔的数字数据。我通过一系列preg_match处理curl结果来处理一些不规则性，并用逗号分隔字段。
print_r输出的结果如下：
Array ( [0] =>
[1] => 18,3,1.28,4,1,1,0.97,16.9,25,0,0.58,9.7,8,0,0.55,12.6,37,0,0.23,6.5,99,,,
[2] => 18,4,1.30,4,0,0,1.00,16.9,25,0,0.58,9.6,8,0,0.55,12.6,37,0,0.24,6.5,99,,,
[3] => 18,5,1.32,4,0,1,1.03,16.9,24,0,0.57,9.6,8,0,0.54,12.6,37,0,0.25,6.4,98,,,
[4] => 18,6,1.34,4,0,0,1.06,16.8,24,0,0.57,9.5,8,0,0.54,12.6,37,0,0.25,6.4,99,,,
[5] => 18,7,1.36,5,0,0,0.67,16.0,35,0,0.56,9.2,7,0,0.55,12.6,36,0,0.25,6.4,99,,,
[6] => 18,8,1.38,5,0,0,0.73,16.5,35,0,0.56,9.5,7,0,0.55,12.6,36,0,0.25,6.3,100,,, )
我希望将逗号分隔的字符串元素转换为子数组，并循环整个数组。除了其他尝试之外，我最接近期望结果的方式是：
for($i = 0; $i < count($done); $i++) {
print_r (explode(',', $done[$i]));
}
结果：
Array ( [0] => ) Array ( [0] => 18 [1] => 3 [2] => 1.28 [3] => 4 [4] => 1 [5] => 1 [6] => 0.97 [7] => 16.9 [8] => 25 [9] => 0 [10] => 0.58 [11] => 9.7 [12] => 8 [13] => 0 [14] => 0.55 [15] => 12.6 [16] => 37 [17] => 0 [18] => 0.23 [19] => 6.5 [20] => 99 [21] => [22] => [23] => ) Array ( [0] => 18 [1] => 4 [2] => 1.30 [3] => 4 [4] => 0 [5] => 0 [6] => 1.00 [7] => 16.9 [8] => 25 [9] => 0 [10] => 0.58 [11] => 9.6 [12] => 8 [13] => 0 [14] => 0.55 [15] => 12.6 [16] => 37 [17] => 0 [18] => 0.24 [19] => 6.5 [20] => 99 [21] => [22] => [23] => ) Array ( [0] => 18 [1] => 5 [2] => 1.32 [3] => 4 [4] => 0 [5] => 1 [6] => 1.03 [7] => 16.9 [8] => 24 [9] => 0 [10] => 0.57 [11] => 9.6 [12] => 8 [13] => 0 [14] => 0.54 [15] => 12.6 [16] => 37 [17] => 0 [18] => 0.25 [19] => 6.4 [20] => 98 [21] => [22] => [23] => )... )
所需的结果：
Array (
[0] => Array ( [0] => 18 [1] => 3 [2] => 1.28 [3] => 4 [4] => 1 [5] => 1 [6] => 0.97 [7] => ...)
[1] => Array ( [0] => 18 [1] => 4 [2] => 1.30 [3] => 4 [4] => 0 [5] => 0 [6] => 1.00 [7] => ...)
[2] => Array ( [0] => 18 [1] => 5 [2] => 1.32 [3] => 4 [4] => 0 [5] => 1 [6] => 1.03 [7] => ... )
)
目标：
echo $done[0][0] . ' ' . $done[0][1] . ' ' ... . '<br />'
$done[1][0] . ' ' . $done[1][1] . ' ' ... . '<br />';
或者类似于此类的内容。