Advanced Custom Fields > Flexible Content field example (set programatically)

acf-fields-flexible-content.php

<?php

add_action( 'acf/init', 'nd_acf_add_local_field_groups' );
/**
 * Add Advanced Custom Fields programatically (Flexible Content field).
 *
 * @link https://www.advancedcustomfields.com/resources/register-fields-via-php/
 * @link https://support.advancedcustomfields.com/forums/topic/register-two-locations-via-php-doesnt-work/
 * @link https://support.advancedcustomfields.com/forums/topic/adding-additional-layout-to-flexible_content-field-in-child-theme/
 *
 * @return void
 */
function nd_acf_add_local_field_groups() {
	
	acf_add_local_field_group( array(
		'key'        => 'group_nd_documents',
		'title'      => 'Documents',
		'fields'     => array(
			array(
				'key'          => 'nd_documents',
				'name'         => 'nd_documents',
				'type'         => 'flexible_content',
				'layouts'      => array(
					array(
						'label'      => 'File',
						'name'       => 'file',
						'display'    => 'row',
						'min'        => '',
						'sub_fields' => array(
							array(
								'key'   => 'file_title',
								'label' => 'Title',
								'name'  => 'file_title',
								'type'  => 'text',
							),
							array(
								'key'   => 'file',
								'label' => 'File',
								'name'  => 'file',
								'type'  => 'file',
							),
						),
					),
					array(
						'label'      => 'URL',
						'name'       => 'url',
						'display'    => 'row',
						'min'        => '',
						'sub_fields' => array(
							array(
								'key'   => 'url_title',
								'label' => 'Title',
								'name'  => 'url_title',
								'type'  => 'text',
							),
							array(
								'key'   => 'url',
								'label' => 'URL',
								'name'  => 'url',
								'type'  => 'url',
							),
						),
					),
				),
				'button_label' => 'Add Document',
				'min'          => '',
				'max'          => '',
			),
		),
		'location'   => array(
			array(
				array(
					'param'    => 'page_ancestor',
					'operator' => '==',
					'value'    => 6,
				),
				array(
					'param'    => 'page_type',
					'operator' => '==',
					'value'    => 'no_children',
				),
			),
		),
		'menu_order' => 6,
		'position'   => 'acf_after_title',
	) );
	
}