代码实现WordPress文章归档页面

WordPress的文章归档还是很有必要的，特别是文章多了之后，用归档可以很方便的找到想要找的文章，网上有很多的插件可以实现这个功能，不过我们喜欢折腾，那么就不用插件，而是使用代码来实现。

如果在配合Jquery的话，可以实现非常棒的伸缩效果，同时还增加了按年来选择的功能。

效果预览

下面我就说下简单的操作方法。

1、把下面的代码添加到主题的 functions.php 里面；

//日志归档
	class hacklog_archives
{
	function GetPosts() 
	{
		global  $wpdb,$rawposts;
		if ( $posts = wp_cache_get( 'posts', 'ihacklog-clean-archives' ) )
			return $posts;
		$query="SELECT DISTINCT ID,post_date,post_date_gmt,comment_count,comment_status,post_password FROM $wpdb->posts WHERE post_type='post' AND post_status = 'publish' AND comment_status = 'open'";
		$rawposts =$wpdb->get_results( $query, OBJECT );
		foreach( $rawposts as $key => $post ) {
			if (!is_array($posts)) {
				$posts = [];
				}
			$posts[ mysql2date( 'Y.m', $post->post_date ) ][] = $post;
			$rawposts[$key] = null; 
		}
		$rawposts = null;
		wp_cache_set( 'posts', $posts, 'ihacklog-clean-archives' );
		return $posts;
	}
	function PostList( $atts = array() ) 
	{
		global $wp_locale;
		global $hacklog_clean_archives_config;
		$atts = shortcode_atts(array(
			'usejs'        => $hacklog_clean_archives_config['usejs'],
			'monthorder'   => $hacklog_clean_archives_config['monthorder'],
			'postorder'    => $hacklog_clean_archives_config['postorder'],
			'postcount'    => '1',
			'commentcount' => '1',
		), $atts);
		$atts=array_merge(array('usejs' => 1, 'monthorder' => 'new', 'postorder' => 'new'),$atts);
		$posts = $this->GetPosts();
		( 'new' == $atts['monthorder'] ) ? krsort( $posts ) : ksort( $posts );
		foreach( $posts as $key => $month ) {
			$sorter = array();
			foreach ( $month as $post )
				$sorter[] = $post->post_date_gmt;
			$sortorder = ( 'new' == $atts['postorder'] ) ? SORT_DESC : SORT_ASC;
			array_multisort( $sorter, $sortorder, $month );
			$posts[$key] = $month;
			unset($month);
		}
		$html = '<div class="car-container';
		if ( 1 == $atts['usejs'] ) $html .= ' car-collapse';
		$html .= '">'. "\n";
		if ( 1 == $atts['usejs'] ) $html .= '<select id="archive-selector"></select><a href="#" class="car-toggler">展开所有月份'."</a>\n";
		$html .= '<ul class="car-list">' . "\n";
		$firstmonth = TRUE;
		foreach( $posts as $yearmonth => $posts ) {
			list( $year, $month ) = explode( '.', $yearmonth );
			$firstpost = TRUE;
			foreach( $posts as $post ) {
				if ( TRUE == $firstpost ) {
					$spchar = $firstmonth ? '<span class="car-toggle-icon car-minus">-</span>' : '<span class="car-toggle-icon car-plus">+</span>';
					$html .= '<li class="car-pubyear-'. $year .'"><span class="car-yearmonth" style="cursor:pointer;">'.$spchar.' ' . sprintf( __('%1$s %2$d'), $wp_locale->get_month($month), $year );
					if ( '0' != $atts['postcount'] ) 
					{
						$html .= '<span class="archive-count">(共' . count($posts) . '篇文章)</span>';
					}
					if ($firstmonth == FALSE) {
					$html .= "</span>\n<ul class='car-monthlisting' style='display:none;'>\n";
					} else {
					$html .= "</span>\n<ul class='car-monthlisting'>\n";
					}
					$firstpost = FALSE;
					$firstmonth = FALSE;
				}
				$html .= '<li>' . mysql2date( 'd', $post->post_date ) . '日: <a target="_blank" href="' . get_permalink( $post->ID ) . '">' . get_the_title( $post->ID ) . '</a>';
				if ( '0' != $atts['commentcount'] && ( 0 != $post->comment_count || 'closed' != $post->comment_status ) && empty($post->post_password) )
					$html .= '<span class="archive-count">(' . $post->comment_count . '条评论)</span>';
				$html .= "</li>\n";
			}
			$html .= "</ul>\n</li>\n";
		}
		$html .= "</ul>\n</div>\n";
		return $html;
	}
	function PostCount() 
	{
		$num_posts = wp_count_posts( 'post' );
		return number_format_i18n( $num_posts->publish );
	}
}
if(!empty($post->post_content))
{
	$all_config=explode(';',$post->post_content);
	foreach($all_config as $item)
	{
		$temp=explode('=',$item);
		$hacklog_clean_archives_config[trim($temp[0])]=htmlspecialchars(strip_tags(trim($temp[1])));
	}
}
else
{
	$hacklog_clean_archives_config=array('usejs' => 1, 'monthorder' => 'new', 'postorder' => 'new');	
}
$hacklog_archives=new hacklog_archives();

2、复制一份主题的 page.php 更名为 archives.php，然后在最顶端加入：

<?php
/*
Template Name: archives
*/
?>

3、再然后找到类似 ，在其下面加入如下代码

<p class="articles_all"><strong><?php bloginfo('name'); ?></strong>目前共有 <?php echo intval(wp_count_posts()->publish); ?>篇文章，<?php $comment_count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '1'"); echo $comment_count; ?>条评论。</p>
	<?php echo $hacklog_archives->PostList();?>

进wp后台添加一新页面，在右侧栏模板选择 archives。

4、如果你的主题本身加载了 jQuery 库，那么继续把下面的 jQ 代码加上去，就会有滑动伸缩效果了。

<script type="text/javascript">
jQuery(document).ready(function() {
	function setsplicon(c, d) {
		if (c.html()=='+' || d=='+') {
			c.html('-');
			c.removeClass('car-plus');
			c.addClass('car-minus');
		} else if( !d || d=='-'){
			c.html('+');
			c.removeClass('car-minus');
			c.addClass('car-plus');
		}
	}
jQuery('div.car-collapse').find('span.car-yearmonth').click(function(e /* 1. 增加事件参数e */) {
	jQuery(this).next('ul').slideToggle('fast');
	setsplicon(jQuery(this).find('.car-toggle-icon'));
	e.stopImmediatePropagation();	// 2. 停止向上冒泡并且阻止元素绑定的同类型事件
});
jQuery('div.car-collapse').find('.car-toggler').click(function(e /* 1. 增加事件参数e */) {
	if ( '展开所有月份' == jQuery(this).text() ) {
		jQuery(this).parent('.car-container').find('.car-monthlisting').show();
		jQuery(this).text('折叠所有月份');
		setsplicon(jQuery('.car-collapse').find('.car-toggle-icon'), '+');
	}
	else {
		jQuery(this).parent('.car-container').find('.car-monthlisting').hide();
		jQuery(this).text('展开所有月份');
		setsplicon(jQuery('.car-collapse').find('.car-toggle-icon'), '-');
	}
	e.stopImmediatePropagation();	// 2. 停止向上冒泡并且阻止元素绑定的同类型事件
	return false;
});
jQuery("#archive-selector").change(function(){
var selval = parseInt(jQuery("#archive-selector").find("option:selected").val(), 10);
	if (selval == 0) {
	jQuery(".car-list li[class^='car-pubyear-']").show();
	} else {
	jQuery.each(jQuery(".car-list li[class^='car-pubyear-']"), function(i, obj){
		var orgval = parseInt(obj.className.replace("car-pubyear-", ""), 10);
				if (selval == orgval)
					obj.style.display='';
				else
			obj.style.display='none';
	});
	}
});

jQuery("#archive-selector").append(" 全部 ");
jQuery.each(jQuery(".car-list li[class^='car-pubyear-']"), function(i, obj){

	var year1 = obj.className.replace("car-pubyear-", "");
	if (jQuery("#archive-selector option[value=" + year1 + "]").length < 1)
		jQuery("#archive-selector").append(" " + year1 + "年 ");
});

});
</script>

css 样式如下，当然你也可以自定义，ok，搞定。

.articles_all{line-height:30px;padding-left:15px;}
.car-container{padding:0 15px 10px 15px;}
.car-collapse .car-yearmonth{cursor:s-resize;}
a.car-toggler{line-height:30px;font-size:14px;color:#c30}
.car-list li{list-style:none;line-height:24px}
.car-list li ul{padding-left:30px}
.car-plus, .car-minus{width:15px;display:block;float:left;font-family:Courier New, Lucida Console, MS Gothic, MS Mincho;}
select#archive-selector{border:1px #ccc solid;width:80px;height:24px;line-height:24px;margin-right:30px;}
.archive-count{padding-left:6px;font-size:12px;color:#777;}