dedecms文章中的图片自动添加ALT属性

@SetSysEnv($this->Fields['typeid'],$this->Fields['typename'],$this->Fields['id'],$this->Fields['title'],'archives');

//替换图片Alt为文档标题
$this->Fields['body'] = str_ireplace(array('alt=""','alt=\&;\&;'),'',$this->Fields['body']);
$this->Fields['body'] = preg_replace("@ [\s]{0,}alt[\s]{0,}=[\&;'\s]{0,}[\s\S]{0,}[\&;'\s] @isU"," ",$this->Fields['body']);
$this->Fields['body'] = str_ireplace("<img " ,"<img alt='".$this->Fields['title']."' ",$this->Fields['body']);