file_add_form_submit in core/modules/file/file.pages.inc

Submit handler for the add file form.

file_build_uri in core/includes/file.inc

Constructs a URI to Backdrop's default files location given a relative path.

file_manage_form_submit in core/modules/file/file.pages.inc

Form submission handler for the 'Save' button for file_manage_form().

file_save_htaccess in core/includes/file.inc

Creates a .htaccess file in the given directory.

file_scan_directory in core/includes/file.inc

Finds all files that match a given mask in a given directory.

file_unmanaged_prepare in core/includes/file.inc

Internal function that prepares the destination for a file_unmanaged_copy or file_unmanaged_move operation.

system_transliteration_retroactive_submit in core/modules/system/system.admin.inc

Form submit function; retroactively transliterates existing file names.

UserStorageController::preSave in core/modules/user/user.entity.inc

Overrides EntityDatabaseStorageController::preSave().