wordpress彩色标签云，演示案例

有很多wordpress都很羡慕别人能有彩色或是动态标签云，但是动态标签云一般都是使用flash插件，这样的话就不利于网站打开的速度和搜索引擎的优化，但是彩色标签云，何乐而不为呢？

今天我在这里就介绍下彩色标签云的应用，教会大家wordpress如何实现彩色标签云。

在自己的模板函数中加入如下代码：

function colorCloud($text) {
$text = preg_replace_callback('|<a (.+?)>|i', 'colorCloudCallback', $text);
return $text;
}
function colorCloudCallback($matches) {
$text = $matches[1];
$color = dechex(rand(0,16777215));
$pattern = '/style=(\'|\")(.*)(\'|\")/i';
$text = preg_replace($pattern, "style=\"color:#{$color};$2;\"", $text);
return "<a $text>";
}
add_filter('wp_tag_cloud', 'colorCloud', 1);

位置如下代码所示：

<?php
include(TEMPLATEPATH."/js/breadcrumb-navigation-xt.php");
function wumii_get_related_items() {
require_once(ABSPATH . 'wp-admin/includes/plugin.php');
$is_enabled = true;
global $post, $wumii_should_display;
$wumii_should_display = $is_enabled
&& !is_plugin_active('wumii-related-posts/wumii-related-posts.php') &&
get_post_status($post->ID) == 'publish' && get_post_type() == 'post' &&
empty($post->post_password) && !is_preview();
if (!$wumii_should_display) {
return;
}
$escapedUrl = wumii_html_escape(get_permalink());
$escapedTitle = wumii_html_escape(the_title('', '', false));
$escapedPic = wumii_html_escape(wumii_get_thumbnail_src());
echo <<<WUMII_HOOK
<div>
<input type="hidden" name="wurl" value="$escapedUrl" />
<input type="hidden" name="wtitle" value="$escapedTitle" />
<input type="hidden" name="wpic" value="$escapedPic" />
</div>
WUMII_HOOK;
}
function wumii_add_load_script($num = 4, $mode = 3) {
global $wumii_should_display;
if (!$wumii_should_display) {
return;
}
$sitePrefix = function_exists('home_url') ? home_url() : get_bloginfo('url');
$themeName = urlencode(get_current_theme());
echo <<< WUMII_SCRIPT
<p style="margin:0;padding:0;height:1px;">
<script type="text/javascript"><!--
var wumiiSitePrefix = "$sitePrefix";
var wumiiEnableCustomPos = true;
//--></script>
<script type="text/javascript"
src="http://widget.wumii.com/ext/relatedItemsWidget.htm?type=1&amp;num=$num&amp;mo
de=$mode&amp;pf=WordPress&amp;theme=$themeName"></script>
<a href="http://www.wumii.com/widget/relatedItems.htm" style="border:0;">
<img src="http://static.wumii.com/images/pixel.png" alt="无觅相关文章插件"
style="border:0;padding:0;margin:0;" />
</a>
</p>
WUMII_SCRIPT;
}
function wumii_html_escape($str) {
return htmlspecialchars(html_entity_decode($str, ENT_QUOTES, 'UTF-8'), ENT_QUOTES,
'UTF-8');
}
function wumii_get_thumbnail_src() {
global $post;
if ( get_post_meta($post->ID, 'thumbnail', true) ) {
$image_info = get_post_meta($post->ID, 'thumbnail', true);
return $image_info;
}
}

if ( function_exists('register_sidebar') ){
    register_sidebar(array(
        'before_widget' => '<div>',
        'after_widget' => '</div>',
        'before_title' => '<h2>',
        'after_title' => '</h2>',
    ));
 }
function colorCloud($text) {
$text = preg_replace_callback('|<a (.+?)>|i', 'colorCloudCallback', $text);
return $text;
}
function colorCloudCallback($matches) {
$text = $matches[1];
$color = dechex(rand(0,16777215));
$pattern = '/style=(\'|\")(.*)(\'|\")/i';
$text = preg_replace($pattern, "style=\"color:#{$color};$2;\"", $text);
return "<a $text>";
}
add_filter('wp_tag_cloud', 'colorCloud', 1);

function slider($before = '<li>', $after = '</li>') {
    global $wpdb, $table_prefix;
    $sql = "select ID,post_title,post_date from ". $table_prefix ."posts where post_status = 'publish' and post_type = 'post'and ID in (SELECT post_id FROM ". $table_prefix ."postmeta where meta_key = 'flash_img')";
 $sql .= "ORDER BY post_date DESC LIMIT 5";
    $posts = $wpdb->get_results($sql);
 $output = '';
    foreach ($posts as $post) {
    $post_title = stripslashes($post->post_title);
    $permalink = get_permalink($post->ID);
 $thumbnail = get_post_meta($post->ID, 'flash_img', true);
 $output .= $before . '<a href="' . $permalink . '" rel="bookmark" title="' . $post_title . '" target="_blank"><img src="' . $thumbnail . '" alt="' . $post_title . '" /></a>'. $after;
 }
 echo $output;
 }

function custom_comment($comment, $args, $depth) {
   $GLOBALS['comment'] = $comment; ?>
   <li <?php comment_class(); ?> id="li-comment-<?php comment_ID() ?>">
     <div id="comment-<?php comment_ID(); ?>">
         <div>
                <?php echo get_avatar($comment,$size='28',$default='<path_to_url>' ); ?>
                <div>
     <?php printf(__('<cite>%s</cite>'), get_comment_author_link()) ?> <?php edit_comment_link(__('(Edit)'),'  ','') ?><br />
                    <em><?php printf(__('%1$s  %2$s'), get_comment_date('Y/m/d '),  get_comment_time(' H:i:s')) ?></em>
                </div>
                <div>
        <?php comment_reply_link(array_merge( $args, array('depth' => $depth, 'max_depth' => $args['max_depth']))) ?>
               </div>
          </div>
    <?php if ($comment->comment_approved == '0') : ?>
             <em>您的评论正在审核中。_Your comment is being reviewed.</em>
             <br />
          <?php endif; ?>

        <?php comment_text() ?>
     </div>

<?php
        }
?>