php shell_exec() command is not working

问题:

I am trying to run a .sh file from php. I tried doing it with shell_exec(). but its not working I refered many questions related to this in stack overflow but could not solve

my php code is(web.php)

    <?php
    echo shell_exec('/var/www/project/xxe.sh');
    echo "done";
    ?>

only done is printed. but it is working from terminal(php /var/www/project/web.php)

In xxe.sh I am calling a python file

    python vin.py

I have also changed the file permission to 777 for both .sh n .py files please help

回答1:

If it works well in shell, I think apache is chrooted. So php can't find /var/...

Or user of httpd user does not have permission to enter /var/...

If you are good at PHP. Open dir /var/... And readdir() and check dir exists and check file exists.

This question might help you. scanning /home/ with opendir()

回答2:

If you say it works on the terminal and not on apache then apache's php.ini file may be disabling the use of shell_exec().

See http://www.php.net/manual/en/ini.core.php#ini.disable-functions

Your apache's php.ini file may look something like

disable_functions=exec,passthru,shell_exec,system,proc_open,popen

Remove shell_exec from this list and restart the web server, although this is a security risk and I don't recommend it.

回答3:

While trying to run a script triggered by github post-receive webhook.

Here is where my project directory is located(cloned git repo):

/var/www/html/my-repo

I create a script inside the above directory called webhook.php:

<?php
#webhook.php

$cmd = shell_exec("git pull 2>&1");

#for debugging
echo $cmd;
?>

Execute the following command inside /var/www/html

sudo chown www-data:www-data -R my-repo/

Test it by going to http://www.myserver.com/my-repo/webhook.php

Add the path to your script to github webhooks.

回答4:

I have been stuck in this problem for several hours.

I have thought about a solution. 1. move your script to a python file "script.py" and place this file to your server root. 2. shell_exec("python script.py");

Any way, it works for me.

回答5:

The problem is usually that when you exec code from within php it is run as the webservers user www-data in alot of linux distros. Normaly this user does not have an enviroment set up, and because of that no PATH. By using full paths in your files you can usually overcome this.

xxe.sh

/usr/bin/python /path/to/script/vin.py

回答6:

I tried everything here and nothing worked. What finally solved it for me was using the following before the shell_exec:

putenv('PATH=/usr/local/bin');

回答7:

On my host I had to give a different path for my php file to be executed from shell_exec(). This didn't work shell_exec('/usr/bin/php backgroundtask.php');.

While this did shell_exec('/opt/php/php-5.5.0/bin/php backgroundtask.php');.

You can visit this Reference.

回答8:

I had the same issue because PHP backslashes.

PHP escapes the backslashes, so the command that reaches the shell

'COPY E:path1\path2\file.prn /B \127.0.0.1\"PRINTER NAME"'

so I gave command like this

'COPY E:\\path1\\path2\\file.prn /B \\\\127.0.0.1\"PRINTER NAME"'. 

You have to double-escape the backslashes: once for PHP and once for the shell.