通过PHP执行shell命令并在浏览器中显示它？ [英] Execute a shell command through php and display it in browser?

问题描述

我想通过php执行一个shell命令并在浏览器中显示它。无论如何要这样做？
这里是我的php代码：[test.php]

 <？php 
 $ number = $ _GET [ NUM]; 
 $ date = $ _ GET [date]; 
 $ output = shell_exec（'egrep -w'2012-09-01 | 974'/home/myquery_test/log/push.log'）; 
 echo< pre> $ output< / pre>; 
？> 
  

当我从浏览器运行这个（test.php）文件时，什么都没有显示出来。但是，当我改变

  $ output = shell_exec（'ls'）
  

其工作正常！为什么egrep / grep命令不起作用？ 使用单引号作为字符串常量分隔符：'egreep -w'< ==> 2012-09-01 | 974'< ==> /home/myquery_test/log/push.log'< ===在字符串中使用双引号，或者使用双引号

  shell_exec（'egrep -w \ '2012-09 -01 | 974 \'/home/myquery_test/log/push.log'）; 
 shell_exec（'egrep -w2012-09-01 | 974/home/myquery_test/log/push.log'）; 
 shell_exec（egrep -w'2012-09-01 | 974'/home/myquery_test/log/push.log）; 
  

而且，为了避免在测试时不会得到警告和错误，将你的ini设置为 E_STRICT | E_ALL ，然后修正警告，而不是忽略它们。 [逗趣地：在你做完这些之后，你可能要考虑接受一些答案] 我看到你在接受这篇文章时接受了很多：

在命令中使用变量：
$ b

  $ output = shell_exec（tail -f | egrep'$ number 。* $ date'/var/www/myquery_test/log/push.log）; 
 $ output = shell_exec（'tail -f | egrep''。$ number。'。*'。$ date。'/var/www/myquery_test/log/push.log'）; 
 $ output = shell_exec（tail -f | egrep \$ number。* $ date \/var/www/myquery_test/log/push.log）; 
  

I would like to execute a shell command through php and display it in a browser. Is there anyway to do so? here is my php code : [test.php]

<?php
$number=$_GET["num"];
$date=$_GET["date"];
$output = shell_exec('egrep -w  '2012-09-01|974' /home/myquery_test/log/push.log');
echo "<pre>$output</pre>";
?>

When I run this(test.php) file from browser nothing shows up. But when i change the

$output = shell_exec('ls')

its working fine!! Why isn't the egrep/grep command not working??

解决方案

The egrep command isn't working, because you're using single quotes as a string constant delimiter: 'egreep -w' <==> 2012-09-01|974' <==> /home/myquery_test/log/push.log' <==
Just use double quotes in the string, or as string delimiters OR escape the quotes.

shell_exec('egrep -w  \'2012-09-01|974\' /home/myquery_test/log/push.log');
shell_exec('egrep -w  "2012-09-01|974" /home/myquery_test/log/push.log');
shell_exec("egrep -w  '2012-09-01|974' /home/myquery_test/log/push.log");

And, to avoid not getting the warnings and errors that would have brought this issue to light when testing, set your ini to E_STRICT|E_ALL, and fix the warnings, rather then ignoring them. [teasingly: after you're done with that, you might want to consider accepting some answers]I see you've accepted a lot while I was typing this post up :)

Using variables in your command:

$output = shell_exec("tail -f | egrep '$number.*$date' /var/www/myquery_test/log/push.log");
$output = shell_exec('tail -f | egrep "'.$number.'.*'.$date.'" /var/www/myquery_test/log/push.log');
$output = shell_exec("tail -f | egrep \"$number.*$date\" /var/www/myquery_test/log/push.log");

这篇关于通过PHP执行shell命令并在浏览器中显示它？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！