function extract_from_directory( $dir, $excludes = array(), $includes = array(), $prefix = '' ) {
$old_cwd = getcwd();
chdir( $dir );
$translations = new Translations;
$file_names = (array) scandir( '.' );
foreach ( $file_names as $file_name ) {
if ( '.' == $file_name || '..' == $file_name ) continue;
if ( preg_match( '/\.php$/', $file_name ) && $this->does_file_name_match( $prefix . $file_name, $excludes, $includes ) ) {
$translations->merge_originals_with( $this->extract_from_file( $file_name, $prefix ) );
}
if ( is_dir( $file_name ) ) {
$translations->merge_originals_with( $this->extract_from_directory( $file_name, $excludes, $includes, $prefix . $file_name . '/' ) );
}
}
chdir( $old_cwd );
return $translations;
}
