defaults.php

<?php

register_activation_hook( __FILE__, 'tlap_default_options' );

function tlap_default_options() {
	$defaults = array(
			'tlap_add_analytics_option'  =>
			array(
				'tlap_yametrika_id'     =>  '',
				'tlap_yametrika_webvisor'   => '0',
				'tlap_analytics_id'   => '',
				'checkbox_liru'   => '0'
			),		
		);

	$option_name = 'tlap_add_analytics_option';	

	foreach ( $defaults as $section => $fields ) {

	$option = get_option( $option_name )[$section];

	if ( !isset( $option )) {
	  update_option( $section, $fields, '', 'no' );
			}
		}
	}



register_activation_hook(__FILE__, 'tlap_default_options');

function tlap_default_options()
{
    $defaults = array(
        'tlap_yametrika_id' => '',
        'tlap_yametrika_webvisor' => '0',
        'tlap_analytics_id' => '',
        'checkbox_liru' => '1'
    );

    $option_name = 'tlap_add_analytics_option';

    if (false == get_option($option_name)) {
        add_option($option_name, $defaults);
    } else {
        foreach ($defaults as $section => $fields) {
            $option = get_option($option_name)[$section];

            if (!isset($option)) {
                add_option($section, $fields, '', 'no');
            }
        }
    }
}