我研究了很多关于这个主题的问题和答案，但我仍然找不到以下问题的解决方案。
我需要从此链接提供的文本中生成一个数组，减去一些特定的行：https://code.wireshark.org/review/gitweb?p=wireshark.git;a=blob_plain;f=manuf。这部分我能够做到。
PHP代码：
$arr = file('https://code.wireshark.org/review/gitweb?p=wireshark.git;a=blob_plain;f=manuf');
$arr = preg_replace('/^(?![a-z0-9]{2}:[a-z0-9]{2}:[a-z0-9]{2}'s).*$/i', '', $arr);
$arr = preg_replace ('/#/i', '',$arr);
$arr = preg_replace('/'t+/', ' ', $arr);
$arr = preg_replace('/'s{2,}/', ' ', $arr);
$arr = preg_replace('/ /', '~', $arr, 2);
foreach ($arr as $field)
{
$macList[] = explode('~', $field);
}
echo "<pre>";
print_r($macList);
echo "</pre>";
问题是当我使用 print_r 时，前 52 个子数组是空的，加上底部的几十个子数组。我不知道如何删除它们。
减少了print_r输出，因为完整输出返回 25770 个子数组：
Array
(
[0] => Array
(
[0] =>
)
[1] => Array
(
[0] =>
)
[2] => Array
(
[0] =>
)
[3] => Array
(
[0] =>
)
[4] => Array
(
[0] =>
)
[5] => Array
(
[0] =>
)
[6] => Array
(
[0] =>
)
[7] => Array
(
[0] =>
)
[8] => Array
(
[0] =>
)
[9] => Array
(
[0] =>
)
[10] => Array
(
[0] =>
)
[11] => Array
(
[0] =>
)
[12] => Array
(
[0] =>
)
[13] => Array
(
[0] =>
)
[14] => Array
(
[0] =>
)
[15] => Array
(
[0] =>
)
[16] => Array
(
[0] =>
)
[17] => Array
(
[0] =>
)
[18] => Array
(
[0] =>
)
[19] => Array
(
[0] =>
)
[20] => Array
(
[0] =>
)
[21] => Array
(
[0] =>
)
[22] => Array
(
[0] =>
)
[23] => Array
(
[0] =>
)
[24] => Array
(
[0] =>
)
[25] => Array
(
[0] =>
)
[26] => Array
(
[0] =>
)
[27] => Array
(
[0] =>
)
[28] => Array
(
[0] =>
)
[29] => Array
(
[0] =>
)
[30] => Array
(
[0] =>
)
[31] => Array
(
[0] =>
)
[32] => Array
(
[0] =>
)
[33] => Array
(
[0] =>
)
[34] => Array
(
[0] =>
)
[35] => Array
(
[0] =>
)
[36] => Array
(
[0] =>
)
[37] => Array
(
[0] =>
)
[38] => Array
(
[0] =>
)
[39] => Array
(
[0] =>
)
[40] => Array
(
[0] =>
)
[41] => Array
(
[0] =>
)
[42] => Array
(
[0] =>
)
[43] => Array
(
[0] =>
)
[44] => Array
(
[0] =>
)
[45] => Array
(
[0] =>
)
[46] => Array
(
[0] =>
)
[47] => Array
(
[0] =>
)
[48] => Array
(
[0] =>
)
[49] => Array
(
[0] =>
)
[50] => Array
(
[0] =>
)
[51] => Array
(
[0] =>
)
[52] => Array
(
[0] => 00:00:00
[1] => 00:00:00
[2] => Officially Xerox, but 0:0:0:0:0:0 is more common
)
)
问：如何删除这 52 个（0 到 51）个空数组？我尝试过的任何方法都没有奏效。
与其尝试删除空键，不如不要在第 1 位添加空数组：EDIT似乎是"空"数组实际上不是空的，而是包含带有空格字符的单个元素。要删除，您可以将empty与trim、array_map和array_filter结合起来：
foreach ($arr as $field)
{
$temp = explode('~', $field);
if(!empty(array_filter(array_map('trim', $temp))))
{
$macList[] = $temp;
}
}
echo "<pre>";
print_r($macList);
echo "</pre>";
作为使用 array_filter() 并假设它始终是一个空的单元素数组的示例：
$new_array = array_filter($array, function($elements) {
return !empty($elements[0]);
});