On a multi-site set up, it's a trivial matter for someone to create a node with some PHP code that takes a peak at another site's settings.php file. Example:
<?php
$file = file ( 'sites/example.com/settings.php' );
foreach ($file as $key => $line) { print $line; print "<br />"; }
?>
What's the best practice for eliminating this problem?
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