DCO Insert Analytics Code
by Denis Yanchevskiy on WordPress.org

Settings page
DCO Insert Analytics Code is a WordPress plugin is intended for insert analytics code(or any custom code) before or after
or beforeUsage
After installation and activation, you can insert the necessary code to the respective fields on the plugin settings page.
GitHub
Settings
- Before code
 - After code
 - Before code
 
Filters list
dco_iac_get_options
Filter for hardcoding override plugin settings. You won’t be able to edit them on the settings page anymore when using this filter.
dco_iac_insert_before_head
Filter to change the code is inserted before
dco_iac_insert_before_head_show
Filter to change show the code is inserted before
dco_iac_insert_after_body
Filter to change the code is inserted after
dco_iac_insert_after_body_show
Filter to change show the code is inserted after
dco_iac_insert_before_body
Filter to change the code is inserted before
dco_iac_insert_before_body_show
Filter to change show the code is inserted before
dco_iac_disable_do_shortcode
Filter to disable shortcode processing in inserted codes
Examples of using filters
Hardcoding override plugin settings
/*
* $current - current plugin settings
*
* $options - plugin settings from database
*
* $default - default plugin settings
*/
function custom_get_options($current, $options, $default) {
    $array = array(
        'before_head' => '',
        'before_head_show' => '0',
        'after_body' => '',
        'after_body_show' => '1',
        'before_body' => '',
        'before_body_show' => '2'
    );
    return $array;
}
add_filter('dco_iac_get_options', 'custom_get_options', 10, 3);
Change before code
/*
* $code - value from "before " setting
*/
function custom_before_head_code( $code ) {
    return $code . '' . "\n";
}
add_filter( 'dco_iac_insert_before_head', 'custom_before_head_code' );
Change before