Re: How to check if something is a sub-directory?

On Fri, 29 Feb 2008 00:44:18 +0100, laredotornado@xxxxxxxxxxx <laredotornado@xxxxxxxxxxx> wrote:

Hi,

Is there a more sophisticated way, beyond the "strstr" function, to
check if $dir1 is a sub-directory of $dir2, both being strings? You
may assume that both are absolute paths.

If it is direct 'descendant':
$is_subdir = realpath($dir1.'/..') == realpath($dir2);

If not, still apply realpath, but check with either a regex or a substring that the 'parent'-path is indeed at the START of the 'child'-path.
--
Rik Wasmus
.

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