php:read files

functions.php

/**
 * A simple function that find all files by extension an return it by an array.
 *
 * @since  [1.0]
 * @see    [http://php.net/manual/en/function.glob.php]
 * @date   2015-05-05
 *
 * @param  [string]                      $directory
 * @param  array                       $extensions like "xml,zip,txt"
 * @return [array]                      array("zip" => array( [0] => "D:\a.zip", [1] => "D:\b.zip"), "xml" => array( [0] => "D:\1.xml"))
 */
function findFiles($directory, $extensions = array()) {
    function glob_recursive($directory, &$directories = array()) {
        foreach(glob($directory, GLOB_ONLYDIR | GLOB_NOSORT) as $folder) {
            $directories[] = $folder;
            glob_recursive("{$folder}/*", $directories);
        }
    }
    glob_recursive($directory, $directories);
    $files = array ();
    foreach($directories as $directory) {
        foreach($extensions as $extension) {
            foreach(glob("{$directory}/*.{$extension}") as $file) {
                $files[$extension][] = $file;
            }
        }
    }
    return $files;
}