contact_category_edit_form_validate in modules/contact/contact.admin.inc

Form validation handler for contact_category_edit_form().

email_field_validate in modules/email/email.module

Implements hook_field_validate().

form_validate_email in includes/form.inc

Form element validation handler for #type 'email'.

system_install in modules/system/system.install

Implements hook_install().

update_settings_validate in modules/update/update.admin.inc

Form validation handler for update_settings().

user_account_form_validate in modules/user/user.module

Form validation handler for user_account_form().

user_login_authenticate_validate in modules/user/user.module

Second phase validation handler on the login form.

user_login_final_validate in modules/user/user.module

The final validation handler on the login form.

user_login_name_validate in modules/user/user.module

First phase validation handler for the login form.

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

Overrides EntityDatabaseStorageController::preSave().