2010-08
26

当年今日入rss啦

By xrspook @ 23:02:56 归类于: 烂日记

众里寻他千百度,蓦然回首,那人却在灯火阑珊处。

上星期已经把“当年今日”功能加到blog里(详细见Arm 2 W),从一开始就打算要加入rss的,但费尽九牛二虎之力都没做到,但今天,终于攻克了!

到底什么原因呢?

首先,我们要看我当年今日的源代码,利用

< ?php wp_today();? >

完成插入,在function.php的代码如下:

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function wp_today(){
	$title = "<h3>当年今日</h3>";
	$limit = 10;
	$order = "latest";
	$post = 1;
	$feed = 1;
 
 
	global $wpdb;
	$post_year = get_the_time('Y');
	$post_month = get_the_time('m');
	$post_day = get_the_time('j');
	if($order == "latest"){ $order = "DESC";} else { $order = '';}
 
	$sql = "select ID, date(post_date_gmt) as h_date, post_title, comment_count FROM 
			$wpdb->posts WHERE post_password = '' AND post_type = 'post' AND post_status = 'publish'
			AND year(post_date_gmt)!='$post_year' AND month(post_date_gmt)='$post_month' AND day(post_date_gmt)='$post_day'
			order by post_date_gmt $order limit $limit";
	$histtory_post = $wpdb->get_results($sql);
	if( $histtory_post ){
		foreach( $histtory_post as $post ){
			$h_date = $post->h_date;
			$h_post_title = $post->post_title;
			$h_permalink = get_permalink( $post->ID );
			$h_comments = $post->comment_count;
			$h_post .= "<li>$h_date -- <a href='".$h_permalink."' title='Permanent Link to ".$h_post_title."'>$h_post_title</a> <!--($h_comments) --></li>";
		}
	}
 
	if ( $h_post ){
		$result = "".$title."<ul>".$h_post."</ul>";
	}
	echo $result;	
}

这堆代码,要实现在blog的某个位置输出当年今日没有任何问题,但要注意,数据是用“echo $result;”完结的,这就埋下了伏笔。

我试过很多回,试图在function.php加入以下这堆代码调用上面的代码实现当年今日在rss中的输出:

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function wp_today_rss($content){
    if (is_feed()){
		$content = $content.wp_today();
		return $content;
	}
	else {
		return $content;
	}
}
add_filter('the_content', 'wp_today_rss');

输出是能输出了,但结果很囧,见图:

当年今日输出在了正文前面!(那堆乱码东西是正文),但代码中我明明是这般写的“$content = $content.wp_today();”,东西应该加在后面的,但实际上却在前面,这让我百思不得其解。

无可奈何,今天试过用最笨的方法把wp_today()除echo $result;以外的数据全部往function wp_today_rss里放,能实现了我希望的效果,见图:

到底怎么办呢?难道要很笨地把同1段代码写2回?????

狂抓不已,于是就去请教别人了,但一请教,人家还没回答我就有了头绪,不如把上面两段代码拆分为3段,即:

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function get_today(){
	$title = "<h3>当年今日</h3>";
	$limit = 10;
	$order = "latest";
	$post = 1;
	$feed = 1;
 
 
	global $wpdb;
	$post_year = get_the_time('Y');
	$post_month = get_the_time('m');
	$post_day = get_the_time('j');
	if($order == "latest"){ $order = "DESC";} else { $order = '';}
 
	$sql = "select ID, date(post_date_gmt) as h_date, post_title, comment_count FROM 
			$wpdb->posts WHERE post_password = '' AND post_type = 'post' AND post_status = 'publish'
			AND year(post_date_gmt)!='$post_year' AND month(post_date_gmt)='$post_month' AND day(post_date_gmt)='$post_day'
			order by post_date_gmt $order limit $limit";
	$histtory_post = $wpdb->get_results($sql);
	if( $histtory_post ){
		foreach( $histtory_post as $post ){
			$h_date = $post->h_date;
			$h_post_title = $post->post_title;
			$h_permalink = get_permalink( $post->ID );
			$h_comments = $post->comment_count;
			$h_post .= "<li>$h_date -- <a href='".$h_permalink."' title='Permanent Link to ".$h_post_title."'>$h_post_title</a> <!--($h_comments) --></li>";
		}
	}
 
	if ( $h_post ){
		$result = "".$title."<ul>".$h_post."</ul>";
	}
	return $result;
}
function wp_today(){
	echo get_today();
}
function wp_today_rss($content){
    if (is_feed()){
		$content = $content.get_today();
		return $content;
	}
	else {
		return $content;
	}
}
add_filter('the_content', 'wp_today_rss');

嘿嘿,对味!function get_today()是核心代码,function wp_today()用作来打印输出,function wp_today_rss()使之能加入到rss中。哈,“echo $result;”换成了“return $result;”解决了纠结我很久的千古难题。只能叹一句,从前的函数调用没领会透,也没有认真留意数据返回那些事。

最后,终于把问题解决了,爽得飞天,哈哈哈~~~~

PS:感谢SH童鞋的鼎力支持!

PS2:代码可能在rss中不能全部显示,有需要者请移步网页。

4 条评论

  1. sh

    要是 正文 文字能像图片中那么大就好了。难道是我 显示器的问题 ?

  2. 很少看到技术型的女生啊。。这验证码,也太长了吧……= =+

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