Description:
------------
I'd love to see a glob_get_base_path() function that returns the base path of a glob following the rules used by glob(). 

The base path is the most specific directory path of a glob. Knowing the base path is useful when mapping a glob to a target directory. This mapping can be used, for example, to copy the matched files to the directory.

Signature:

glob_get_base_path(string $glob[, int $flags = 0])

$glob - a glob
$flags - the glob() flags

Result: string - the base path of the glob

Usage example:

<?php

// could be stored in the application configuration
define('SOURCE_GLOB', 'css/*.css');
define('TARGET_DIR', 'public_html/css');

// runtime
$basePath = glob_get_base_path(SOURCE_GLOB);
$basePathLength = strlen($basePath);

foreach (glob($glob) as $sourcePath) {
    $targetPath = substr_replace($sourcePath, TARGET_DIR, 0, $basePathLength);

    copy($sourcePath, $targetPath);
}

Test script:
---------------
<?php

echo glob_get_base_path('*.css')."\n";
echo glob_get_base_path('/*.css')."\n";
echo glob_get_base_path('css/*.css)."\n";
echo glob_get_base_path('css/foo*.css)."\n";
echo glob_get_base_path('css/foo{bar,baz}.css)."\n";

Expected result:
----------------
.
/
css
css
css