我试图覆盖子主题中某个主题的函数，但无法使其正常工作。在functions.php 在这个主题上我可以看到require_once 生产线：

require_once("inc/alterna-functions.php");

我想重写该文件中的一个函数。我刚从alterna/functions.php 到alterna-child/functions.php 并做了如下更改：

if (!function_exists(\'alterna_get_social_list\')) :
    function alterna_get_social_list($extra_name = \'\', $topbar = false, $data = null, $target = \'_blank\')
    {
        global $alterna_options;

        $str = "";
        $social_list = array(
            array(\'twitter\', \'Twitter\'),
            array(\'twitter_1\', \'Twitter #1\'), // this is new
            array(\'twitter_2\', \'Twitter #2\'), // this is new
            array(\'twitter_3\', \'Twitter #3\'), // this is new
            array(\'twitter_4\', \'Twitter #4\'), // this is new
            array(\'facebook\', \'Facebook\'),
            array(\'facebook_1\', \'Facebook #1\'), // this is new
            array(\'facebook_2\', \'Facebook #2\'), // this is new
            array(\'facebook_3\', \'Facebook #3\'), // this is new
            array(\'facebook_4\', \'Facebook #4\'), // this is new
            array(\'google\', \'Google Plus\', \'google-plus\'),
            array(\'google_1\', \'Google Plus #1\', \'google-plus_1\'), // this is new
            array(\'google_2\', \'Google Plus #2\', \'google-plus_2\'), // this is new
            array(\'google_3\', \'Google Plus #3\', \'google-plus_3\'), // this is new
            array(\'google_4\', \'Google Plus #4\', \'google-plus_4\'), // this is new
            array(\'youtube\', \'Youtube\'),
            array(\'linkedin\', \'Linkedin\'),
            array(\'instagram\', \'instagram\'),
            array(\'whatsapp\', \'Whatsapp\'),
            array(\'email\', \'Email\', \'envelope\'),
            array(\'rss\', \'Rss\')
        );

        if ($data != null) {
            foreach ($social_list as $social_item) {
                if (isset($data[\'type\']) && $data[\'type\'] == $social_item[0]) {
                    if (!isset($data[\'url\'])) {
                        $data[\'url\'] = \'#\';
                    }
                    if (!isset($data[\'target\'])) {
                        $data[\'target\'] = \'_blank\';
                    }
                    $str .= \'<li class="social"><a  href="\' . esc_attr($data[\'url\']) . \'" target="\' . esc_attr($data[\'target\']) . \'"\';

                    if (isset($data[\'tooltip\']) && $data[\'tooltip\'] == "yes") {
                        $str .= \' title="\' . esc_attr($social_item[1]) . \'" class="show-tooltip"\';
                        if (isset($data[\'placement\']) && $data[\'placement\'] != "") {
                            $str .= \' data-placement="\' . esc_attr($data[\'placement\']) . \'"\';
                        }
                    }

                    $str .= \'><span class="alterna-icon-\' . esc_attr($social_item[0]) . \'"\';

                    if ($data[\'bg_color\'] != "" || $data[\'color\'] != "") {
                        $str .= \' style="\';
                        if ($data[\'bg_color\'] != "") {
                            $str .= \'background:\' . esc_attr($data[\'bg_color\']) . \';\';
                        }
                        if ($data[\'color\'] != "") {
                            $str .= \'color:\' . esc_attr($data[\'color\']) . \';\';
                        }
                        $str .= \'"\';
                    }

                    $str .= \'><i class="fa fa-\' . (isset($social_item[2]) ? esc_attr($social_item[2]) : esc_attr($social_item[0])) . \'"></i></span></a></li>\';
                }
            }
        } else {
            foreach ($social_list as $social_item) {
                if (penguin_get_options_key(\'social-\' . $social_item[0]) != \'\') {
                    if (!$topbar) {
                        $str .= \'<li class="social"><a title="\' . esc_attr($social_item[1]) . \'" href="\' . esc_attr(penguin_get_options_key(\'social-\' . $social_item[0])) . \'" target="\' . esc_attr($target) . \'" ><span class="alterna-icon-\' . esc_attr($social_item[0]) . \'"><i class="fa fa-\' . (isset($social_item[2]) ? esc_attr($social_item[2]) : esc_attr($social_item[0])) . \'"></i></span></a></li>\';
                    } else {
                        $str .= \'<li class="social"><a href="\' . esc_attr(penguin_get_options_key(\'social-\' . $social_item[0])) . \'" target="\' . esc_attr($target) . \'" ><i class="fa fa-\' . (isset($social_item[2]) ? esc_attr($social_item[2]) : esc_attr($social_item[0])) . \'"></i></a></li>\';
                    }
                }
            }
        }

        return $str;
    }
endif;

但它不起作用，因为我看不到主题的变化。我做错了什么？实现这一目标的正确方法是什么？