我已经将一些数据从文件解析为字符串变量，
CPU NFS CIFS HTTP Total Net kB/s HDD kB/s SSD kB/s Tape kB/s Cache Cache CP CP HDD SSD OTHER FCP iSCSI FCP kB/s iSCSI kB/s
in out read write read write read write age hit time ty util util in out in out
65% 0 0 0 11357 97020 2846 0 156160 0 0 0 0 >60 100% 100% :f 45% 0% 3 0 11354 0 0 92987 0
67% 0 0 0 11761 100535 2943 511 161119 0 0 0 0 >60 100% 100% :f 43% 0% 0 0 11761 0 0 96397 0
66% 0 0 0 11911 101736 2984 276 151088 0 0 0 0 >60 100% 100% :v 48% 0% 0 0 11911 0 0 97534 0
56% 0 0 0 12026 102664 3094 36 24 0 0 0 0 >60 100% 1% : 2% 0% 11 0 12015 0 0 98419 0
81% 0 0 0 10023 85660 2317 1964 198416 0 0 0 0 >60 100% 83% Ff 60% 0% 0 0 10023 0 0 82117 0
67% 0 0 0 11914 101825 2993 336 152883 0 0 0 0 >60 100% 100% :f 55% 0% 0 0 11914 0 0 97625 0
67% 0 0 0 11526 98491 2869 256 151040 0 0 0 0 >60 100% 100% :f 51% 0% 0 0 11526 0 0 94388 0
66% 0 0 0 11589 99011 2931 0 143225 0 0 0 0 >60 100% 100% :f 51% 0% 0 0 11589 0 0 94949 0
57% 0 0 0 11869 101355 3032 56 20544 0 0 0 0 >60 100% 26% : 10% 0% 7 0 11862 0 0 97182 0
76% 0 0 0 9408 79189 2212 2022 122504 0 0 0 0 >60 100% 48% Fn 38% 0% 223 0 9185 0 0 75939 0
74% 0 0 0 10978 92981 2651 572 147078 0 0 0 0 >60 100% 100% :f 53% 0% 19 0 10959 0 0 89095 0
67% 0 0 0 11839 101109 2946 8 148332 0 0 0 0 >60 100% 100% :f 56% 0% 0 0 11839 0 0 96954 0
64% 0 0 0 11517 98413 2899 256 138248 0 0 0 0 >60 100% 100% :f 51% 0% 0 0 11517 0 0 94355 0
62% 0 0 0 11653 99151 2920 559 106198 0 0 0 0 >60 100% 81% : 40% 0% 52 0 11601 0 0 95030 0
56% 0 0 0 11765 99752 2973 577 3009 0 0 0 0 >60 100% 3% Fn 2% 0% 100 0 11665 0 0 95652 0
82% 0 0 0 9987 85219 2327 1570 207259 0 0 0 0 >60 100% 100% :f 60% 0% 5 0 9982 0 0 81692 0
67% 0 0 0 11859 101347 2970 0 158696 0 0 0 0 >60 100% 100% :f 57% 0% 0 0 11859
到一个二维数组中，这样我就可以取其中一列的平均值，谁能告诉我怎么做?
我代码:preg_match('/'.preg_quote($word1).'(.*?)'.preg_quote($word2).'/is', $akshay_file, $match);
$text2 = nl2br($match[1]);
echo "$text2";
谁能让我知道它是怎么做的，我做错了吗?谢谢。
我猜您是从文件中读取的。作为一个选项，逐行读取文件，并考虑以下代码
<?php
$n = "65% 0 0 0 11357 97020 2846 0 156160 0 0 0 0 >60 100% 100% :f 45% 0% 3 0 11354 0 0 92987 0";
$n = preg_replace('!'s+!', ' ', $n);
$parts = explode(' ', $n);
echo '<pre>'.print_r($parts, true).'</pre>';
?>
首先应该将代码分成几行，然后用空格将每行分开。
$lines = preg_split('/$'R?^/m', $data);
foreach ($lines as $line) {
$cols = preg_split('/'s's+/', $data);
// do sth..
}