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Add previous_post_link() and next_post_link(). 

git-svn-id: http://svn.automattic.com/wordpress/trunk@1557 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
rboren 2004-08-24 01:35:57 +00:00
parent b7ac2955a2
commit f3cf5ba8c9
1 changed files with 96 additions and 0 deletions
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96
wp-includes/template-functions-links.php
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@ -242,6 +242,102 @@ function edit_comment_link($link = 'Edit This', $before = '', $after = '') {
// Navigation links
function get_previous_post($in_same_cat = false, $excluded_categories = '') {
global $post, $wpdb;
if(! is_single()) {
return null;
}
$current_post_date = $post->post_date;
$current_category = $post->post_category;
$sqlcat = '';
if ($in_same_cat) {
$sqlcat = " AND post_category = '$current_category' ";
}
$sql_exclude_cats = '';
if (!empty($excluded_categories)) {
$blah = explode('and', $excluded_categories);
foreach($blah as $category) {
$category = intval($category);
$sql_exclude_cats .= " AND post_category != $category";
}
}
return @$wpdb->get_row("SELECT ID, post_title FROM $wpdb->posts WHERE post_date < '$current_post_date' AND post_status = 'publish' $sqlcat $sql_exclude_cats ORDER BY post_date DESC LIMIT 1");
}
function get_next_post($in_same_cat = false, $excluded_categories = '') {
global $post, $wpdb;
if(! is_single()) {
return null;
}
$current_post_date = $post->post_date;
$current_category = $post->post_category;
$sqlcat = '';
if ($in_same_cat) {
$sqlcat = " AND post_category = '$current_category' ";
}
$sql_exclude_cats = '';
if (!empty($excluded_categories)) {
$blah = explode('and', $excluded_categories);
foreach($blah as $category) {
$category = intval($category);
$sql_exclude_cats .= " AND post_category != $category";
}
}
$now = current_time('mysql');
return @$wpdb->get_row("SELECT ID,post_title FROM $wpdb->posts WHERE post_date > '$current_post_date' AND post_date < '$now' AND post_status = 'publish' $sqlcat $sql_exclude_cats AND ID != $post->ID ORDER BY post_date ASC LIMIT 1");
}
function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') {
$post = get_previous_post($in_same_cat, $excluded_categories);
if(! $post) {
return;
}
$title = apply_filters('the_title', $post->post_title);
$string = '<a href="'.get_permalink($post->ID).'">';
$link = str_replace('%title', $title, $link);
$link = $string . $link . '</a>';
$format = str_replace('%link', $link, $format);
echo $format;
}
function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat = false, $excluded_categories = '') {
$post = get_next_post($in_same_cat, $excluded_categories);
if(! $post) {
return;
}
$title = apply_filters('the_title', $post->post_title);
$string = '<a href="'.get_permalink($post->ID).'">';
$link = str_replace('%title', $title, $link);
$link = $string . $link . '</a>';
$format = str_replace('%link', $link, $format);
echo $format;
}
function previous_post($format='%', $previous='previous post: ', $title='yes', $in_same_cat='no', $limitprev=1, $excluded_categories='') {
global $id, $post, $wpdb;
global $posts, $posts_per_page, $s;