我正在尝试在中插入代码head 通过MU插件标记。我不知道为什么head 标记和init 未使用更新add_action(\'wp_head\', \'my_function\') 和add_action(\'init\', \'my_function2\'). 我的代码示例如下：

<?php
    class some_code        
    {
        public
        function __construct()
        {
            add_action(\'init\', \'change_url\');
            add_action(\'wp_head\', \'print_header_scripts\');
    }

    function change_url()
    {
        $domain_name = $_SERVER[\'SERVER_NAME\'];
        $country_code = get_country_code();
        if ($country_code == "PK")
            {
                header("location: http://///////////////");
                exit();
            }
        else if ($country_code == "AU" && $domain_name !== "au.cacricketbats.com")
        {


              header("location: https:///////////////////" . 
                parse_url($_SERVER[\'REQUEST_URI\'], PHP_URL_PATH));
                exit();
            }
        }

        function print_header_scripts()
        {
    ?> /***************************************************************************/
            <script>
                (function(i,s,o,g,r,a,m){i[\'GoogleAnalyticsObject\']=r;i[r]=i[r]||function(){
                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
                })(window,document,\'script\',\'//www.google-analytics.com/analytics.js\',\'ga\');

                ga(\'create\', \'UA-xxxxxxxxx-x\', \'auto\');
                ga(\'send\', \'pageview\');
            </script>"
            <?php
        }
    }
        $myCode = new some_code();
        ?>

我也检查过了wp_head() 正在呼叫header.php 我的WordPress主题。请帮帮我，谢谢。

<?php
class some_code        
{

function change_url()
{
    $domain_name = $_SERVER[\'SERVER_NAME\'];
    $country_code = get_country_code();
    if ($country_code == "PK")
        {
            header("location: http://///////////////");
            exit();
        }
    else if ($country_code == "AU" && $domain_name !== "au.cacricketbats.com")
    {


          header("location: https:///////////////////" . 
            parse_url($_SERVER[\'REQUEST_URI\'], PHP_URL_PATH));
            exit();
        }
    }

    function print_header_scripts()
    {
?> /***************************************************************************/
        <script>
            (function(i,s,o,g,r,a,m){i[\'GoogleAnalyticsObject\']=r;i[r]=i[r]||function(){
            (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
            })(window,document,\'script\',\'//www.google-analytics.com/analytics.js\',\'ga\');

            ga(\'create\', \'UA-xxxxxxxxx-x\', \'auto\');
            ga(\'send\', \'pageview\');
        </script>"
        <?php
    }
}
    $myCode = new some_code();
    $myCode -> change_url();
add_action(\'wp_head\', array($myCode, \'print_ga_scripts\'));
    ?>