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

Submit handler for the add file form.

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

Generate form fields for the third step in the add file wizard.

file_field_settings_form in core/modules/file/file.field.inc

Implements hook_field_settings_form().

file_file_is_readable in core/modules/file/file.module

Check if a file entity is readable or not.

file_get_public_and_private_stream_wrapper_names in core/modules/file/file.module

file_get_stream_wrapper in core/modules/file/file.module

Return a specific stream wrapper's registry information.

file_is_local in core/modules/file/file.module

Check if a file entity is considered local or not.

file_is_writeable in core/modules/file/file.module

Check if a file entity is considered writeable or not.

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

Page callback: Form constructor for the file manage form.

file_stream_wrapper_get_class in core/includes/file.inc

Returns the stream wrapper class name for a given scheme.

filter_editor_file_upload_settings_form in core/modules/filter/filter.admin.inc

Subform constructor to configure the text editor's file upload settings.

filter_editor_image_upload_settings_form in core/modules/filter/filter.admin.inc

Subform constructor to configure the text editor's image upload settings.

image_field_settings_form in core/modules/image/image.field.inc

Implements hook_field_settings_form().

image_gd_save in core/modules/system/image.gd.inc

GD helper to write an image resource to a destination file.

image_style_flush in core/modules/image/image.module

Flush cached media for a style.

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

Form builder; Configure the site file handling.

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

Form submit function; retroactively transliterates existing file names.

_backdrop_bootstrap_full in core/includes/common.inc