Why does an Eclipse builder return a "file_get_contents() ... Permission denied" warning for a PHP script but not the command line?

Question

Background: I'm trying to use Less.php to compile my project's LESS code into CSS in an Eclipse builder.

When I install and run less.php with the command lessc, it correctly compiles my LESS into CSS with no visible errors:

However, when I set up lessc to run as a builder in Eclipse:

I get a Warning: file_get_contents(...): failed to open stream: Permission denied in ... message:

Stranger still, a moment later, a newly-compiled CSS file always appears. So this script seems to be working, but it always spits out this warning that I don't see when I run the same script in the command line.

• What causes the "permission denied" error on localhost?
• Why would it appear when Eclipse runs the script but not when it's run from the command line?
• Could my Eclipse builder configuration be missing something?

I'm running

• XAMPP 1.8.2
• Windows 7
• PHP 5.4.27
• Eclipse Luna Service Release 2 (4.4.2)

Answer 1

2 guesses:

• Eclipse has not the right to read the file/folder

• In the php.ini is something like this

  disable_functions=file_get_contents