[WordPress] wordpress自定义标签云与随机获取标签的方法详解

<?php wp_tag_cloud( $args ); ?>

<?php $args = array( 'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45, 'format' => 'flat', 'separator' => " ", 'orderby' => 'name', 'order' => 'ASC', 'exclude' => null, 'include' => null, 'topic_count_text_callback' => default_topic_count_text, 'link' => 'view', 'taxonomy' => 'post_tag', 'echo' => true, 'child_of' => null(see Note!) ); ?>

• smallest —— 最小的标签（使用次数最少）显示大小为8
  
• largest ——最大的标签（使用次数最多）显示大小为22
  
• unit —— 最大值最小值的单位为'pt'
  
• number —— 至多显示45个标签
  
• format —— 以平面形式显示所有标签（标签之间用空格隔开）
  
• separator —— 显示标签之间的空格
  
• orderby —— 按名称为标签排序
  
• order —— 以升序排列
  
• exclude —— 不排除任何标签
  
• include —— 包括所有标签
  
• topic_count_text_callback —— 使用函数 default_topic_count_text
  
• link —— 可视
  
• taxonomy —— 用文章的标签作为云基础
  
• echo —— 输出结果
  

$html = '<ul class="post_tags">';
foreach (get_tags( array('number' => 50, 'orderby' => 'count', 'order' => 'DESC', 'hide_empty' => false) ) as $tag){
$color = dechex(rand(0,16777215));
$tag_link = get_tag_link($tag->term_id);
$html .= "<li><a href='{$tag_link}' title='{$tag->name} Tag' class='{$tag->slug}' style='color:#{$color}'>";
$html .= "{$tag->name} ({$tag->count})</a></li>";
}
$html .= '</ul>';
echo $html;

//获取随机标签
function get_rand_tags()
{
global $post, $wpdb;
$sql = "SELECT * FROM {$wpdb->prefix}terms wt INNER JOIN {$wpdb->prefix}term_taxonomy wtt on wt.term_id=wtt.term_id where wtt.taxonomy='post_tag' ORDER BY RAND() LIMIT 20";
$related_posts = $wpdb->get_results($sql);
$html = '<ul class="post_tags">';
foreach($related_posts as $tag)
{
$color = dechex(rand(0,16777215));
$tag_link = get_tag_link($tag->term_id);
$html .= "<li><a href='{$tag_link}' target='_blank' title='{$tag->name} Tag' class='{$tag->slug}' style='color:#{$color}'>";
$html .= "{$tag->name} ({$tag->count})</a></li>";
}
$html .= '</ul>';
echo $html;
}