ckeditor_image_upload in core/modules/ckeditor/ckeditor.pages.inc
Menu callback; Saves images uploaded via copy/paste into the editor.
file_managed_file_save_upload in core/modules/file/file.module
Saves any files that have been uploaded into a managed_file element.
form_example_tutorial_10_validate in modules/examples/form_example/form_example_tutorial.inc
Validate handler for form_example_tutorial_10().
installer_manager_download_project in core/modules/installer/installer.manager.inc
Downloads a project given a project url.
locale_translate_import_form_submit in core/modules/locale/locale.bulk.inc
Process the locale import form submission.
system_site_information_settings_validate in core/modules/system/system.admin.inc
Validates the submitted site-information form.
user_validate_picture in core/modules/user/user.module
Validates an image uploaded by a user.
_file_test_form_submit in core/modules/simpletest/tests/file_test.module
Process the upload.
_image_field_default_image_validate in core/modules/image/image.field.inc
Element validation function for setting a default image.