file_field_widget_upload_validators in modules/file/file.field.inc
Retrieves the upload validators for a file field.
file_managed_file_process in modules/file/file.module
Process function to expand the managed_file element type.
file_save_upload in includes/file.inc
Saves a file upload to a new location.
image_field_widget_form in modules/image/image.field.inc
Implements hook_field_widget_form().
locale_translate_import_form_submit in modules/locale/locale.admin.inc
Process the locale import form submission.
system_theme_settings_validate in modules/system/system.admin.inc
Validator for the system_theme_settings() form.
theme_file_upload_help in modules/file/file.field.inc
Returns HTML for help text based on file upload validators.
user_validate_picture in modules/user/user.module
Validates an image uploaded by a user.