实现dedecms自动给文章图片加alt标签

不废话，直接开始：
第一步：打开 include/ arc.archives.class.php , 找到如下代码：

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

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

替换为：

$this->Fields['body'] = str_ireplace(array('altalt=""','alt=\'\''),'',$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']); 
$this->Fields['imgurls'] = str_ireplace(array('altalt=""','alt=\'\''),'',$this->Fields['imgurls']); 
$this->Fields['imgurls'] = preg_replace("@ [\s]{0,}alt[\s]{0,}=[\"'\s]{0,}[\s\S]{0,}[\"'\s] @isU"," ",$this->Fields['imgurls']); 
$this->Fields['imgurls'] = str_ireplace("<img " ,"<img alt=\"".$this->Fields['title']."\" ",$this->Fields['imgurls']);

$this->Fields['body'] = str_ireplace(array('altalt=""','alt=\'\''),'',$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']);

$this->Fields['imgurls'] = str_ireplace(array('altalt=""','alt=\'\''),'',$this->Fields['imgurls']);

$this->Fields['imgurls'] = preg_replace("@ [\s]{0,}alt[\s]{0,}=[\"'\s]{0,}[\s\S]{0,}[\"'\s] @isU"," ",$this->Fields['imgurls']);

$this->Fields['imgurls'] = str_ireplace("<img " ,"<img alt=\"".$this->Fields['title']."\" ",$this->Fields['imgurls']);

第二步骤：没有了！搞定，收工！

注意，这个功能是对于生成html页面时起作用,也就是实现一个在生成时的替换功能。