Run bash script to create file in PHP

Question

In addition to my previous question , another problem appeared and I decided to make a new question for it:

I am currently calling a php script that than runs a bash script. The php script looks like:

chdir('/home/');
$output = shell_exec('./do.sh');
echo "<pre>$output</pre>";

The do.sh contains:

#! /bin/bash

echo 12;
dd if=/dev/urandom of=test.test bs=1048576 count=2

The problem is following:

When I call ./do.sh from the terminal everything works fine: test.test is created and the ouput is 12

However, when I call it from my php file, the output is 12 aswell, but no file is being created. Since I know almost nothing about bash scripting, I have no idea why this is happening...

Answer 1

Check if PHP safe_mode is enabled. You have to turn it off in your /etc/php.ini file, and obviously check filesystem permissions.