侧边栏的标签云（Tag Cloud）一直是 WordPress 2.3+ 以后的内置功能，一般直接调用函数 wp_tag_cloud 或者在 Widgets 里开启即可，但是默认的全部是一个颜色，只是大小不一样，很是不顺眼，虽然可以用 Simple Tags 之类的插件，但是总感觉不爽，所以我介绍一个不用任何插件就能显示彩色标签云的方法。
方法是 Alex 那里看来的
后台编辑 主题 的 functions.php , 输入以下代码
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);
$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);
颜色是随机的，可以自行修改 $color = dechex(rand(0,16777215)); 这行来修改范围，这样就很炫耀。。。。
然后在侧边栏 sidebar.php 里调用如下代码：
<?php wp_tag_cloud(‘smallest=8&largest=24&number=50′); ?>
即可，8 是最小的 tag 的字体大小（用的最少的 tag），24 是最大的（用的最多的 tag），50 是 tag 的数目，可以自行修改。
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