php - 使用 preg_replace 替换值

Question

我有一个 Joomla 插件（在这种情况下并不重要），它的设计目的是接受带有大量数字的输入（在一段文本中）并用一系列 s 替换它们。

我的问题是我需要对我的 $article->text 进行 preg_replace，但我不知道如何将更改应用于匹配的条款。我见过 preg_replace_callback，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;
    }

Answer 1

function onPrepareContent( &$article, &$params, $limitstart )
{
    global $mainframe;
    // define the regular expression
    $pattern = "#{lotterynumbers}(.*?){/lotterynumbers}#s";
    if(isset($article->text)){
        $article->text=preg_replace_callback($pattern,create_function('$match','$init="<div class=\'number\'><span>";$out="</span></div>"; return $init.implode($out.$init,explode(",",$match[1])).$out;'),$article->text);

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

我还没有测试过，但它应该可以工作