typecho自定义 上一篇/下一篇

/**
* 显示下一篇
*
* @access public
* @param string $default 如果没有下一篇,显示的默认文字
* @return void
*/
function theNext($widget, $default = NULL)
{
$db = Typecho_Db::get();
$sql = $db->select()->from('table.contents')
->where('table.contents.created > ?', $widget->created)
->where('table.contents.status = ?', 'publish')
->where('table.contents.type = ?', $widget->type)
->where('table.contents.password IS NULL')
->order('table.contents.created', Typecho_Db::SORT_ASC)
->limit(1);
$content = $db->fetchRow($sql);
 
if ($content) {
$content = $widget->filter($content);
$link = '<a href="' . $content['permalink'] . '" title="' . $content['title'] . '">下一篇</a>';
echo $link;
} else {
echo $default;
}
} 
/**
* 显示上一篇
*
* @access public
* @param string $default 如果没有下一篇,显示的默认文字
* @return void
*/
function thePrev($widget, $default = NULL)
{
$db = Typecho_Db::get();
$sql = $db->select()->from('table.contents')
->where('table.contents.created < ?', $widget->created)
->where('table.contents.status = ?', 'publish')
->where('table.contents.type = ?', $widget->type)
->where('table.contents.password IS NULL')
->order('table.contents.created', Typecho_Db::SORT_DESC)
->limit(1);
$content = $db->fetchRow($sql); 
if ($content) {
$content = $widget->filter($content);
$link = '<a href="' . $content['permalink'] . '" title="' . $content['title'] . '">上一篇</a>';
echo $link;
} else {
echo $default;
}
}

将以上代码写入functions.php
调用代码如下:
<?php thePrev($this); ?><?php theNext($this); ?>

SKY

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