调取文章的方法

一、默认方法：将下面代码放到主题文章页面single模板或者边栏sidebar模板适当位置即可(当前栏目)

<ul>
    <?php
    $cat = get_the_category();
    foreach($cat as $key=>$category){
    $catid = $category->term_id;
    }
    $args = array('orderby' => 'rand','showposts' => 8,'cat' => $catid );
    $query_posts = new WP_Query();
    $query_posts->query($args);
    while ($query_posts->have_posts()) : $query_posts->the_post();
    ?>
    <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
    <?php endwhile;?>
</ul>

<ul>

<?php

$cat = get_the_category();

foreach($cat as $key=>$category){

$catid = $category->term_id;

}

$args = array('orderby' => 'rand','showposts' => 8,'cat' => $catid );

$query_posts = new WP_Query();

$query_posts->query($args);

while ($query_posts->have_posts()) : $query_posts->the_post();

<?php endwhile;?>

</ul>

方法一：采用wordpress内置函数，在需要的时候直接调用以下代码：
这种方法最简洁也最快速，但其中用到了get_posts函数，那么网页中记录当前文章的信息就被替换掉了，如果后面再出现调用当前文章信息的话就会出现问题，都会以这里调用的随机文章为准，这些代码放在页面的最后部分，就没问题（比如侧边栏调用随即文章），但如果放在页面中，那么后面的评论、上一篇、下一篇、标签、作者等等需要知道当前文章信息的地方都会发生错误。

<ul>
<?php $rand_posts = get_posts('numberposts=5&orderby=rand');
foreach( $rand_posts as $post ) : ?>
   <li>
        <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
   </li>
<?php endforeach; ?>
</ul>

<ul>

<?php $rand_posts = get_posts('numberposts=5&orderby=rand');

foreach( $rand_posts as $post ) : ?>

<li>

</li>

<?php endforeach; ?>

</ul>

方法三：在函数模版function.php中添加函数，然后调用。在function.php文件中添加以下代码：

<?php
function random_posts($posts_num=8,$before='<li>',$after='</li>'){
    global $wpdb;
    $sql = "SELECT ID, post_title,guid
            FROM $wpdb->posts
            WHERE post_status = 'publish' ";
    $sql .= "AND post_title != '' ";
    $sql .= "AND post_password ='' ";
    $sql .= "AND post_type = 'post' ";
    $sql .= "ORDER BY RAND() LIMIT 0 , $posts_num ";
    $randposts = $wpdb->get_results($sql);
    $output = '';
    foreach ($randposts as $randpost) {
        $post_title = stripslashes($randpost->post_title);
        $permalink = get_permalink($randpost->ID);
        $output .= $before.'<a href="'
            . $permalink . '"  rel="bookmark" title="';
        $output .= $post_title . '">' . $post_title . '</a>';
        $output .= $after;
    }
    echo $output;
}//random_posts()参数有$posts_num即文章数量,$before开始标签默认<li>,$after=结束标签默认</li>
?>

<?php

function random_posts($posts_num=8,$before='<li>',$after='</li>'){

global $wpdb;

$sql = "SELECT ID, post_title,guid

FROM $wpdb->posts

WHERE post_status = 'publish' ";

$sql .= "AND post_title != '' ";

$sql .= "AND post_password ='' ";

$sql .= "AND post_type = 'post' ";

$sql .= "ORDER BY RAND() LIMIT 0 , $posts_num ";

$randposts = $wpdb->get_results($sql);

$output = '';

foreach ($randposts as $randpost) {

$post_title = stripslashes($randpost->post_title);

$permalink = get_permalink($randpost->ID);

$output .= $before.'<a href="'

. $permalink . '" rel="bookmark" title="';

$output .= $post_title . '">' . $post_title . '</a>';

$output .= $after;

}

echo $output;

}//random_posts()参数有$posts_num即文章数量,$before开始标签默认<li>,$after=结束标签默认</li>

然后在需要调用随机文章的地方插入下面的代码：

<?php random_posts(); ?>

1	<?php random_posts(); ?>

WordPress实现相关文章展示

相关文章的获取思路是：Tags 标签相关>同分类下文章，也就是说，先获取标签相同的文章，如果还达不到数量，就调用该分类下的文章补足。获取方法貌似最初来自 Willin Kan 大师，然后我参考了倡萌的写法，加上了日期的字段。我先贴一下实现的代码：

<ul>
<?php
  $post_num = 8; // 默认展示8篇文章，可以自行修改~
  $exclude_id = $post->ID;
  $posttags = get_the_tags(); $i = 0;
  if ( $posttags ) {
    $tags = ''; foreach ( $posttags as $tag ) $tags .= $tag->term_id . ',';
    $args = array(
      'post_status' => 'publish',
      'tag__in' => explode(',', $tags),
      'post__not_in' => explode(',', $exclude_id),
      'caller_get_posts' => 1,
      'orderby' => 'comment_date',
      'posts_per_page' => $post_num,
    );
    query_posts($args);
    while( have_posts() ) { the_post(); ?>
      <li><a rel="bookmark" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" target="_blank"><?php the_title(); ?></a><span class="pub-time"><?php the_time('m月d日') ?></span></li>
    <?php
      $exclude_id .= ',' . $post->ID; $i ++;
    } wp_reset_query();
  }
  if ( $i < $post_num ) {
    $cats = ''; foreach ( get_the_category() as $cat ) $cats .= $cat->cat_ID . ',';
    $args = array(
      'category__in' => explode(',', $cats),
      'post__not_in' => explode(',', $exclude_id),
      'caller_get_posts' => 1,
      'orderby' => 'comment_date',
      'posts_per_page' => $post_num - $i
    );
    query_posts($args);
    while( have_posts() ) { the_post(); ?>
      <li><a rel="bookmark" href="<?php the_permalink(); ?>"  title="<?php the_title(); ?>" target="_blank"><?php the_title(); ?></a><span class="pub-time"><?php the_time('m月d日') ?></span></li>
    <?php $i++;
    } wp_reset_query();
  }
  if ( $i  == 0 )  echo '<li>没有相关文章!</li>';
  ?>
</ul>

<ul>

<?php

$post_num = 8; // 默认展示8篇文章，可以自行修改~

$exclude_id = $post->ID;

$posttags = get_the_tags(); $i = 0;

if ( $posttags ) {

$tags = ''; foreach ( $posttags as $tag ) $tags .= $tag->term_id . ',';

$args = array(

'post_status' => 'publish',

'tag__in' => explode(',', $tags),

'post__not_in' => explode(',', $exclude_id),

'caller_get_posts' => 1,

'orderby' => 'comment_date',

'posts_per_page' => $post_num,

);

query_posts($args);

while( have_posts() ) { the_post(); ?>

<li><a rel="bookmark" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" target="_blank"><?php the_title(); ?></a><span class="pub-time"><?php the_time('m月d日') ?></span></li>

<?php

$exclude_id .= ',' . $post->ID; $i ++;

} wp_reset_query();

}

if ( $i < $post_num ) {

$cats = ''; foreach ( get_the_category() as $cat ) $cats .= $cat->cat_ID . ',';

$args = array(

'category__in' => explode(',', $cats),

'post__not_in' => explode(',', $exclude_id),

'caller_get_posts' => 1,

'orderby' => 'comment_date',

'posts_per_page' => $post_num - $i

);

query_posts($args);

while( have_posts() ) { the_post(); ?>

<li><a rel="bookmark" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" target="_blank"><?php the_title(); ?></a><span class="pub-time"><?php the_time('m月d日') ?></span></li>

<?php $i++;

} wp_reset_query();

}

if ( $i == 0 ) echo '<li>没有相关文章!</li>';

</ul>