使用preg_replace替换值

我有一个joomla插件(在这个上下文中不重要),它设计为使用一个数字(在文本的一段内)输入并用一系列的s替换它们。

我的问题是我需要对我的$Article->文本进行preg_替换,但我不知道如何将更改应用于匹配的条款。我见过preg_replace_回调,但我不知道如何在函数中调用它。

function onPrepareContent( &$article, &$params, $limitstart )
    {
        global $mainframe;
        // define the regular expression
        $pattern = "#{lotterynumbers}(.*?){/lotterynumbers}#s";
        if(isset($article->text)){
            preg_match($pattern, $article->text, $matches);
            $numbers = explode("," , $matches[1]);
            foreach ($numbers as $number) {
                echo "<div class='number'><span>" . $number . "</span></div>";  
            }
        }else{
            $article->text = 'No numbers';
        }
        return true;
    }

修改后的代码:

function onPrepareContent( &$article, &$params, $limitstart )
    {
        global $mainframe;
        // define the regular expression
        $pattern = "#{lotterynumbers}(.*?){/lotterynumbers}#s";
        if(isset($article->text)){
            preg_match($pattern, $article->text, $matches);
            $numbers = explode("," , $matches[1]);
            foreach ($numbers as $number) {
                $numberlist[] = "<div class='number'><span>" . $number . "</span></div>";   
            }
            $numberlist = implode("", $numberlist);
            $article->text = preg_replace($pattern, $numberlist, $article->text);

        }else{
            $article->text = 'No numbers';
        }
        return true;
    }