shell commands with php

[unknown1]

Hello, Just wanted to see if someone could tell me how to execute shell commands via php

I tired with exec() and shell_exec() but it doesn't execute anything? Can someone who is familiar with this explain how this works and why it won't work when I tried.

Here is an example of what I'm trying to execute.

e.g.

 

echo shell_exec('Xvfb :2 -screen 0 1024x768x24&');

echo shell_exec('export DISPLAY=localhost:2.0');

echo shell_exec('khtml2png2 --sw 100 --sh 100 http://www.example.com example.png');

 

 

Thanks in advance!!

 

[oni-kun]

You probably didn't define a path. Try something such as

$exe = exec('/bin/cal 1995', $result);
echo $result;

 

Also you may want to look at escapeshellcmd

[trq]

Firstly, are you sure xvfb & khtml2png2 are installed? There not exactly standard apps.

[unknown1]

Yes, I have installed them.

 

Just not sure if I can execute just exec() with login or do I need something like licssh2

and a login script or can I just execute the commands...

[trq]

You just need to make sure the user Apache runs under has sufficient permissions to execute the commands in question.

[unknown1]

This is my current script, does anyone have any ideas of why this won't work??

Take note it runs fine from command line and produces the results needed but doesn't work from script.

 

Thanks in advance!!

 

<?php

$script1 = "Xvfb :2 -screen 0 1024x768x24&";
$script2 = "export DISPLAY=localhost:2.0";
$script3 = "khtml2png2 --sw 100 --sh 100 http://www.ask.com ask.png";

$connection = ssh2_connect('server.xxxxxxxxxxx.com', 22);
ssh2_auth_password($connection, 'root', 'xxxxxxxxxxxx');

$stream = ssh2_exec($connection, $script1);
sleep(10);
$stream = ssh2_exec($connection, $script2);
$stream = ssh2_exec($connection, $script3);
sleep(5);

fclose($stream);
echo "All done!!";
?>

[optikalefx]

run the commands in terminal first.  if they work in terminal then they will work with shell_exec()

[unknown1]

run the commands in terminal first.  if they work in terminal then they will work with shell_exec()

 

Okay but the script produces a screen shot and works fine from terminal and doesn't produce the screen shot when I run it from shell_exec().

 

Any ideas of why this maybe??

[unknown1]

Anyone at all have an idea

[Mchl]

[removed]

 

Didn't notice you were connecting to remote server.

[optikalefx]

ok try running a basic shell command like shell_exec('pwd'); and see if you get output.  If you do, then it will mostly likely be a PHP permission problem.