WP_REST_Controller::get_collection_params()

	public function get_collection_params() {
		return array(
			'context'                => $this->get_context_param(),
			'page'                   => array(
				'description'        => __( 'Current page of the collection.' ),
				'type'               => 'integer',
				'default'            => 1,
				'sanitize_callback'  => 'absint',
				'validate_callback'  => 'rest_validate_request_arg',
				'minimum'            => 1,
			),
			'per_page'               => array(
				'description'        => __( 'Maximum number of items to be returned in result set.' ),
				'type'               => 'integer',
				'default'            => 10,
				'minimum'            => 1,
				'maximum'            => 100,
				'sanitize_callback'  => 'absint',
				'validate_callback'  => 'rest_validate_request_arg',
			),
			'search'                 => array(
				'description'        => __( 'Limit results to those matching a string.' ),
				'type'               => 'string',
				'sanitize_callback'  => 'sanitize_text_field',
				'validate_callback'  => 'rest_validate_request_arg',
			),
		);
	}