backdrop_build_css_cache in includes/common.inc

Aggregates and optimizes CSS files into a cache file in the files directory.

backdrop_build_js_cache in includes/common.inc

Aggregates JavaScript files into a cache file in the files directory.

_color_save_stylesheet in modules/color/color.module

Saves the rewritten stylesheet to disk.

file_save_data in includes/file.inc

Saves a file to the specified destination and creates a database entry.

FileUnmanagedSaveDataTest::testFileSaveData in modules/simpletest/tests/file.test

Test the file_unmanaged_save_data() function.

_locale_rebuild_js in includes/locale.inc

(Re-)Creates the JavaScript translation file for a language.

system_retrieve_file in modules/system/system.module

Attempts to get a file using backdrop_http_request and to store it locally.