ZBLOG自动为内容图片添加alt属性 利于SEO效果

// 自动ZBP图片ALT itbulu.com整理自网络
function imgAlt(&$template){
	global $zbp;
	$article = $template->GetTags('article');
	$pattern = "/<img(.*?)src=('|\")([^>]*).(bmp|gif|jpeg|jpg|png|swf)('|\")(.*?)>/i";
	$replacement = '<img alt="'.$article->Title.'" src=$2$3.$4$5/>';
	$content = preg_replace($pattern, $replacement, $article->Content);
	$article->Content = $content;
	$template->SetTags('article', $article);
}

Add_Filter_Plugin('Filter_Plugin_ViewPost_Template','imgAlt');