Yii2-WangEditorWidget上传以后数据库字段格式化

/**
 * 格式化正文中的图片路径，入库时替换为相对路径，获取详情时替换为绝对路径
 */
public function formatContent($content, $type = 'insert')
{
    $imgUrlPrefix = rtrim(Yii::$app->params['cdn_url_prefix'], '/');
    $urlData = parse_url($imgUrlPrefix);
    $host = $urlData['host'];
    $scheme = $urlData['scheme'];

    //过滤正文无用内容
    if($type == 'insert'){
        //过滤js脚本
        $pattern = "//i";
        $content = preg_replace($pattern, '', $content);
        //过滤样式
        $pattern = "//i";
        $content = preg_replace($pattern, '', $content);
        //除img标签外过滤掉标签的所有属性
        $pattern ="/<((?!img)[a-z][a-z0-9]*)[^>]*?(\/?)>/i";
        $content = preg_replace($pattern,'<$1$2>', $content);

        //过滤word中font标签
        $pattern = "/([\s\S]*?)<\/font>/i";
        $content = preg_replace($pattern, '$1', $content);
        //将单个font标签替换为空
        $pattern = "/<\/font>|/";
        $content = preg_replace($pattern, '', $content);

        //过滤word中xml数据
        $pattern = "//";
        $content = preg_replace($pattern, '', $content);

        //将单个div标签替换
        $pattern = "/<\/div>|/";
        $content = preg_replace($pattern, '', $content);

        //替换空p标签
        $pattern = "/

<\/p>|
<\/p>/";
        $content = preg_replace($pattern, '', $content);

        //将没有任何标签的文本，用p标签包含
        $pattern = "/<\/p>((?!
)[\s\S]+?)
/";
        $content = preg_replace($pattern, "
$1
", $content);

        //将没有任何标签的文本，用p标签包含
        $pattern = "/<\/p>((?!
)[\s\S]+?)$/";
        $content = preg_replace($pattern, "
$1
", $content);

        //过滤掉其他无用标签
        $content = strip_tags($content, '

');
    }


    //处理图片，如果是外部图片，替换为空
    $pattern =  '//i';
    if(preg_match_all($pattern, strip_tags($content,''), $matches) > 0)
    {
        if($type == 'insert'){
            foreach($matches[1] as $key=>$value){
                $urlInfo = parse_url($value);
                if($urlInfo['scheme']."://".$urlInfo['host'] == $scheme.'://'.$host){
                    $replace = str_replace($imgUrlPrefix, '', $matches[0][$key]);
                    $content = str_replace($matches[0][$key], $replace, $content);
                }else{
                    $content = str_replace($matches[0][$key], '', $content);
                }
            }
           
            $content = preg_replace('/title\s*=\s*[\"|\'].*?[\"|\']/', '', $content);
        }elseif($type == 'detail'){
            foreach($matches[1] as $value){
                if(substr($value, 0 , 1) !== '/'){
                    $replace = $imgUrlPrefix.'/'.$value;
                }else{
                    $replace = $imgUrlPrefix.$value;
                }

                $content = str_replace($value, $replace, $content);
            }
        }
    }

    //如果图片没有src属性则过滤掉此img
    $img_preg = "/]*?src[^<>]*?>).*?>/i";
    preg_match_all($img_preg,$content,$match);
    if (isset($match[0]) && count($match[0]))
    {
        foreach ($match[0] as $item) {
            $content=str_replace( $item,'',$content);
        }
    }
    return $content;
}