PHP exec命令可从终端运行，但不能从网络运行

Question

I created a simple test file lets call it exec.php with this content:

<?php
    exec('scp -r /vhosts/malta/docs/www/mysite/uploads/www.mysite.com/images/promotions/xmas-survey user@255.255.255.255:/vhosts/mysite/docs/www/images/promotions/xmas-survey/',$out);
    print_r($out);
?>
Command Executed.

FYI: account user doesn't need a password to access 255.255.255.255

The problem is here :

when I run this file from the terminal like

php /vhosts/test/www/exec.php

the command works but when i try to run it from the web like

http://localhost/test/exec.php

the command doesn't.

Any ideas?

Thanks in advance

Answer 1

You need to create a ssh login from the webserver to the other server for the user that runs the webserver (eg www-data, apache2, etc...), otherwise the scp command won't work.

once you create the ssh login the command should work...

you might want to secure the ssh login with an rsa key for better security if you haven't done that already

Answer 2

Probably what's wrong is that you need to specify full path to scp. Web server user usually doesn't have the same things in path.

To actually diagnoze what went wrong, redirect stderr to somewhere you can read it from.

As example:

exec($yourcommand . " 2>&1", $out);
// print out the $out variable

Answer 3

检查用户“ www-data”是否具有运行exec.php文件的必要执行权限