输出“linux shell”与“php system()”——排序

Question

让我们执行命令：

# zcat -f /var/log/remotelog*|grep -e "10\.0\.1\.15"|grep -e "7,35)"|sort -k 1M -k 2r|tail -n 250 3>&1

得到这样的输出：

Apr  3 11:38:49 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:38:35 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  3 11:06:20 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:06:16 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  3 11:06:15 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:05:41 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  2 17:54:02 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  2 17:53:31 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  1 02:02:27 10.0.1.15 GPOND[927]: Success upgrade ONU(7,35)
Apr  1 02:02:23 10.0.1.15 GPOND[927]: Success Download-OS ONU(7,35)
Mar 31 15:03:51 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Mar 31 15:03:41 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)

非常好...

但后来我这样做：

<?php
$e = "zcat -f /var/log/remotelog*|grep -e \"10\.0\.1\.15\"|grep -e \"7,35)\"|sort -k 1M -k 2r|tail -n 250 3>&1";
system($e, $ret);
echo $ret ;
?>

我得到了这个输出：

Mar 31 15:03:51 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Mar 31 15:03:41 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  3 11:38:49 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:38:35 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  3 11:06:20 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:06:16 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  3 11:06:15 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  3 11:05:41 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  2 17:54:02 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link on(operational)
Apr  2 17:53:31 10.0.1.15 GPOND[927]: ONU(7,35) eth port 1 link off(operational)
Apr  1 02:02:27 10.0.1.15 GPOND[927]: Success upgrade ONU(7,35)
Apr  1 02:02:23 10.0.1.15 GPOND[927]: Success Download-OS ONU(7,35)

为什么？没看懂……

Answer 1

如果我理解正确，第二个（通过 PHP）是“正确”的输出。

由于列表首先按月份名称排序，月份名称取决于语言环境设置，我怀疑命令行和 PHP 中的语言环境设置（LC_* 环境变量）不同，这会影响输出排序。