backdrop_validate_form in core/includes/form.inc

Validates user-submitted form data in the $form_state array.

CommonBackdropArrayUnitTest::testSet in core/modules/simpletest/tests/common.test

Tests setting nested array values.

date_html5_element_validate in core/modules/date/date.elements.inc

Element validation callback for the HTML5 widget.

date_year_range_validate in core/modules/date/date.elements.inc

Element validation function for the date_year_range form element.

drupal_array_set_nested_value in core/includes/drupal.inc

Sets a value in a nested array with variable depth.

field_form_set_state in core/modules/field/field.form.inc

Stores processing information about a field in $form_state.

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

Form submission handler for upload/remove button of file_field_widget_form().

file_managed_file_submit in core/modules/file/file.module

Form submission handler for upload / remove buttons of managed_file elements.

form_process_machine_name in core/includes/form.inc

Processes a machine-readable name form element.

form_set_value in core/includes/form.inc

Changes submitted form values during form validation.

views_ui_add_ajax_wrapper in core/modules/views_ui/views_ui.admin.inc

After-build function that adds a wrapper to a form region (for AJAX refreshes).

_form_builder_handle_input_element in core/includes/form.inc

Adds the #name and #value properties of an input element before rendering.

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

Element validation function for setting a default image.