使用PHP exec()的ls -ltr [英] ls -ltr using PHP exec()

问题描述

作为问题状态. 当我做

as the problem states.. when i do

exec("ls -ltr  > output.txt 2>&1",$result,$status);

其与正常输出不同.将添加一个额外的列.像

its different from the normal output. An extra column gets added. something like

-rw-r--r-- 1 apache   apache    211 Jul  1 15:52 withoutsudo.txt
-rw-r--r-- 1 apache   apache      0 Jul  1 15:53 withsudo.txt

从命令提示符处执行时，就像

where as when executed from the command prompt its like

-rw-r--r-- 1 apache   apache    211 2010-07-01 15:52 withoutsudo.txt
-rw-r--r-- 1 apache   apache    274 2010-07-01 15:53 withsudo.txt
-rw-r--r-- 1 apache   apache    346 2010-07-01 15:55 sudominusu.txt
-rw-r--r-- 1 apache   apache    414 2010-07-01 15:58 sudominusu.txt

看看区别.因此，在第一个输出中，我通常的awk'{print $ 8}'失败了. 我在使用cron时遇到了同样的问题.但是通过调用

See the difference. So in the first output , my usual awk '{print $8}' fails. I was facing the same problem with cron. But solved it by calling

./$HOME/.bashrc

脚本中的

.但是不会发生使用php.如果我能以某种方式将php从通常的环境讲"到"exec".任何帮助，将不胜感激.

in the script. But not happening using php. If somehow i can "tell" php to "exec" from the usual environment. Any help would be appreciated.

推荐答案

我想您只对文件名感兴趣，并且想按相反的时间排序. 试试这个:

I guess you are only interested in the file names and you want to sort with reverse time. Try this:

ls -tr1> output.txt 2>& 1

ls -tr1 > output.txt 2>&1

您将获得仅包含文件名的列表，因此根本不需要awk.

You'll get a list with only the file names, so you don't need awk at all.

另一种解决方案是使用"--time-style iso"指定时间格式.看看手册页

Another solution is to specify the time format with "--time-style iso". Have a look at the man page

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