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WordPress/wp-includes/link-template.php

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<?php
/**
* WordPress Link Template Functions
*
* @package WordPress
* @subpackage Template
*/
/**
* Display the permalink for the current post.
*
* @since 1.2.0
* @uses apply_filters() Calls 'the_permalink' filter on the permalink string.
*/
function the_permalink() {
echo apply_filters('the_permalink', get_permalink());
}
/**
* Retrieve trailing slash string, if blog set for adding trailing slashes.
*
* Conditionally adds a trailing slash if the permalink structure has a trailing
* slash, strips the trailing slash if not. The string is passed through the
* 'user_trailingslashit' filter. Will remove trailing slash from string, if
* blog is not set to have them.
*
* @since 2.2.0
* @uses $wp_rewrite
*
* @param $string String a URL with or without a trailing slash.
* @param $type_of_url String the type of URL being considered (e.g. single, category, etc) for use in the filter.
* @return string
*/
function user_trailingslashit($string, $type_of_url = '') {
global $wp_rewrite;
if ( $wp_rewrite->use_trailing_slashes )
$string = trailingslashit($string);
else
$string = untrailingslashit($string);
// Note that $type_of_url can be one of following:
// single, single_trackback, single_feed, single_paged, feed, category, page, year, month, day, paged
$string = apply_filters('user_trailingslashit', $string, $type_of_url);
return $string;
}
/**
* Display permalink anchor for current post.
*
* The permalink mode title will use the post title for the 'a' element 'id'
* attribute. The id mode uses 'post-' with the post ID for the 'id' attribute.
*
* @since 0.71
*
* @param string $mode Permalink mode can be either 'title', 'id', or default, which is 'id'.
*/
function permalink_anchor($mode = 'id') {
global $post;
switch ( strtolower($mode) ) {
case 'title':
$title = sanitize_title($post->post_title) . '-' . $post->ID;
echo '<a id="'.$title.'"></a>';
break;
case 'id':
default:
echo '<a id="post-' . $post->ID . '"></a>';
break;
}
}
/**
* Retrieve full permalink for current post or post ID.
*
* @since 1.0.0
*
* @param int $id Optional. Post ID.
* @param bool $leavename Optional, defaults to false. Whether to keep post name or page name.
* @return string
*/
function get_permalink($id = 0, $leavename = false) {
$rewritecode = array(
'%year%',
'%monthnum%',
'%day%',
'%hour%',
'%minute%',
'%second%',
$leavename? '' : '%postname%',
'%post_id%',
'%category%',
'%author%',
$leavename? '' : '%pagename%',
);
$post = &get_post($id);
if ( empty($post->ID) ) return false;
if ( $post->post_type == 'page' )
return get_page_link($post->ID, $leavename);
elseif ($post->post_type == 'attachment')
return get_attachment_link($post->ID);
$permalink = get_option('permalink_structure');
if ( '' != $permalink && !in_array($post->post_status, array('draft', 'pending')) ) {
$unixtime = strtotime($post->post_date);
$category = '';
if ( strpos($permalink, '%category%') !== false ) {
$cats = get_the_category($post->ID);
if ( $cats )
usort($cats, '_usort_terms_by_ID'); // order by ID
$category = $cats[0]->slug;
if ( $parent=$cats[0]->parent )
$category = get_category_parents($parent, false, '/', true) . $category;
// show default category in permalinks, without
// having to assign it explicitly
if ( empty($category) ) {
$default_category = get_category( get_option( 'default_category' ) );
$category = is_wp_error( $default_category ) ? '' : $default_category->slug;
}
}
$author = '';
if ( strpos($permalink, '%author%') !== false ) {
$authordata = get_userdata($post->post_author);
$author = $authordata->user_nicename;
}
$date = explode(" ",date('Y m d H i s', $unixtime));
$rewritereplace =
array(
$date[0],
$date[1],
$date[2],
$date[3],
$date[4],
$date[5],
$post->post_name,
$post->ID,
$category,
$author,
$post->post_name,
);
$permalink = get_option('home') . str_replace($rewritecode, $rewritereplace, $permalink);
$permalink = user_trailingslashit($permalink, 'single');
return apply_filters('post_link', $permalink, $post, $leavename);
} else { // if they're not using the fancy permalink option
$permalink = get_option('home') . '/?p=' . $post->ID;
return apply_filters('post_link', $permalink, $post, $leavename);
}
}
/**
* Retrieve permalink from post ID.
*
* @since 1.0.0
*
* @param int $post_id Optional. Post ID.
* @param mixed $deprecated Not used.
* @return string
*/
function post_permalink($post_id = 0, $deprecated = '') {
return get_permalink($post_id);
}
/**
* Retrieve the permalink for current page or page ID.
*
* Respects page_on_front. Use this one.
*
* @since 1.5.0
*
* @param int $id Optional. Post ID.
* @param bool $leavename Optional, defaults to false. Whether to keep post name or page name.
* @return string
*/
function get_page_link($id = false, $leavename = false) {
global $post;
$id = (int) $id;
if ( !$id )
$id = (int) $post->ID;
if ( 'page' == get_option('show_on_front') && $id == get_option('page_on_front') )
$link = get_option('home');
else
$link = _get_page_link( $id , $leavename );
return apply_filters('page_link', $link, $id);
}
/**
* Retrieve the page permalink.
*
* Ignores page_on_front. Internal use only.
*
* @since 2.1.0
* @access private
*
* @param int $id Optional. Post ID.
* @param bool $leavename Optional. Leave name.
* @return string
*/
function _get_page_link( $id = false, $leavename = false ) {
global $post, $wp_rewrite;
if ( !$id )
$id = (int) $post->ID;
else
$post = &get_post($id);
$pagestruct = $wp_rewrite->get_page_permastruct();
if ( '' != $pagestruct && isset($post->post_status) && 'draft' != $post->post_status ) {
$link = get_page_uri($id);
$link = ( $leavename ) ? $pagestruct : str_replace('%pagename%', $link, $pagestruct);
$link = get_option('home') . "/$link";
$link = user_trailingslashit($link, 'page');
} else {
$link = get_option('home') . "/?page_id=$id";
}
return apply_filters( '_get_page_link', $link, $id );
}
/**
* Retrieve permalink for attachment.
*
* This can be used in the WordPress Loop or outside of it.
*
* @since 2.0.0
*
* @param int $id Optional. Post ID.
* @return string
*/
function get_attachment_link($id = false) {
global $post, $wp_rewrite;
$link = false;
if (! $id) {
$id = (int) $post->ID;
}
$object = get_post($id);
if ( $wp_rewrite->using_permalinks() && ($object->post_parent > 0) && ($object->post_parent != $id) ) {
$parent = get_post($object->post_parent);
if ( 'page' == $parent->post_type )
$parentlink = _get_page_link( $object->post_parent ); // Ignores page_on_front
else
$parentlink = get_permalink( $object->post_parent );
if ( is_numeric($object->post_name) || false !== strpos(get_option('permalink_structure'), '%category%') )
$name = 'attachment/' . $object->post_name; // <permalink>/<int>/ is paged so we use the explicit attachment marker
else
$name = $object->post_name;
if (strpos($parentlink, '?') === false)
$link = user_trailingslashit( trailingslashit($parentlink) . $name );
}
if (! $link ) {
$link = get_bloginfo('url') . "/?attachment_id=$id";
}
return apply_filters('attachment_link', $link, $id);
}
/**
* Retrieve the permalink for the year archives.
*
* @since 1.5.0
*
* @param int|bool $year False for current year or year for permalink.
* @return string
*/
function get_year_link($year) {
global $wp_rewrite;
if ( !$year )
$year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
$yearlink = $wp_rewrite->get_year_permastruct();
if ( !empty($yearlink) ) {
$yearlink = str_replace('%year%', $year, $yearlink);
return apply_filters('year_link', get_option('home') . user_trailingslashit($yearlink, 'year'), $year);
} else {
return apply_filters('year_link', get_option('home') . '/?m=' . $year, $year);
}
}
/**
* Retrieve the permalink for the month archives with year.
*
* @since 1.0.0
*
* @param bool|int $year False for current year. Integer of year.
* @param bool|int $month False for current month. Integer of month.
* @return string
*/
function get_month_link($year, $month) {
global $wp_rewrite;
if ( !$year )
$year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
if ( !$month )
$month = gmdate('m', time()+(get_option('gmt_offset') * 3600));
$monthlink = $wp_rewrite->get_month_permastruct();
if ( !empty($monthlink) ) {
$monthlink = str_replace('%year%', $year, $monthlink);
$monthlink = str_replace('%monthnum%', zeroise(intval($month), 2), $monthlink);
return apply_filters('month_link', get_option('home') . user_trailingslashit($monthlink, 'month'), $year, $month);
} else {
return apply_filters('month_link', get_option('home') . '/?m=' . $year . zeroise($month, 2), $year, $month);
}
}
/**
* Retrieve the permalink for the day archives with year and month.
*
* @since 1.0.0
*
* @param bool|int $year False for current year. Integer of year.
* @param bool|int $month False for current month. Integer of month.
* @param bool|int $day False for current day. Integer of day.
* @return string
*/
function get_day_link($year, $month, $day) {
global $wp_rewrite;
if ( !$year )
$year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
if ( !$month )
$month = gmdate('m', time()+(get_option('gmt_offset') * 3600));
if ( !$day )
$day = gmdate('j', time()+(get_option('gmt_offset') * 3600));
$daylink = $wp_rewrite->get_day_permastruct();
if ( !empty($daylink) ) {
$daylink = str_replace('%year%', $year, $daylink);
$daylink = str_replace('%monthnum%', zeroise(intval($month), 2), $daylink);
$daylink = str_replace('%day%', zeroise(intval($day), 2), $daylink);
return apply_filters('day_link', get_option('home') . user_trailingslashit($daylink, 'day'), $year, $month, $day);
} else {
return apply_filters('day_link', get_option('home') . '/?m=' . $year . zeroise($month, 2) . zeroise($day, 2), $year, $month, $day);
}
}
/**
* Retrieve the permalink for the feed type.
*
* @since 1.5.0
*
* @param string $feed Optional, defaults to default feed. Feed type.
* @return string
*/
function get_feed_link($feed = '') {
global $wp_rewrite;
$permalink = $wp_rewrite->get_feed_permastruct();
if ( '' != $permalink ) {
if ( false !== strpos($feed, 'comments_') ) {
$feed = str_replace('comments_', '', $feed);
$permalink = $wp_rewrite->get_comment_feed_permastruct();
}
if ( get_default_feed() == $feed )
$feed = '';
$permalink = str_replace('%feed%', $feed, $permalink);
$permalink = preg_replace('#/+#', '/', "/$permalink");
$output = get_option('home') . user_trailingslashit($permalink, 'feed');
} else {
if ( empty($feed) )
$feed = get_default_feed();
if ( false !== strpos($feed, 'comments_') )
$feed = str_replace('comments_', 'comments-', $feed);
$output = get_option('home') . "/?feed={$feed}";
}
return apply_filters('feed_link', $output, $feed);
}
/**
* Retrieve the permalink for the post comments feed.
*
* @since 2.2.0
*
* @param int $post_id Optional. Post ID.
* @param string $feed Optional. Feed type.
* @return string
*/
function get_post_comments_feed_link($post_id = '', $feed = '') {
global $id;
if ( empty($post_id) )
$post_id = (int) $id;
if ( empty($feed) )
$feed = get_default_feed();
if ( '' != get_option('permalink_structure') ) {
$url = trailingslashit( get_permalink($post_id) ) . 'feed';
if ( $feed != get_default_feed() )
$url .= "/$feed";
$url = user_trailingslashit($url, 'single_feed');
} else {
$type = get_post_field('post_type', $post_id);
if ( 'page' == $type )
$url = get_option('home') . "/?feed=$feed&amp;page_id=$post_id";
else
$url = get_option('home') . "/?feed=$feed&amp;p=$post_id";
}
return apply_filters('post_comments_feed_link', $url);
}
/**
* Display the comment feed link for a post.
*
* Prints out the comment feed link for a post. Link text is placed in the
* anchor. If no link text is specified, default text is used. If no post ID is
* specified, the current post is used.
*
* @package WordPress
* @subpackage Feed
* @since 2.5.0
*
* @param string $link_text Descriptive text.
* @param int $post_id Optional post ID. Default to current post.
* @param string $feed Optional. Feed format.
* @return string Link to the comment feed for the current post.
*/
function post_comments_feed_link( $link_text = '', $post_id = '', $feed = '' ) {
$url = get_post_comments_feed_link($post_id, $feed);
if ( empty($link_text) )
$link_text = __('Comments Feed');
echo "<a href='$url'>$link_text</a>";
}
/**
* Retrieve the feed link for a given author.
*
* Returns a link to the feed for all posts by a given author. A specific feed
* can be requested or left blank to get the default feed.
*
* @package WordPress
* @subpackage Feed
* @since 2.5.0
*
* @param int $author_id ID of an author.
* @param string $feed Optional. Feed type.
* @return string Link to the feed for the author specified by $author_id.
*/
function get_author_feed_link( $author_id, $feed = '' ) {
$author_id = (int) $author_id;
$permalink_structure = get_option('permalink_structure');
if ( empty($feed) )
$feed = get_default_feed();
if ( '' == $permalink_structure ) {
$link = get_option('home') . "?feed=$feed&amp;author=" . $author_id;
} else {
$link = get_author_posts_url($author_id);
if ( $feed == get_default_feed() )
$feed_link = 'feed';
else
$feed_link = "feed/$feed";
$link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
}
$link = apply_filters('author_feed_link', $link, $feed);
return $link;
}
/**
* Retrieve the feed link for a category.
*
* Returns a link to the feed for all post in a given category. A specific feed
* can be requested or left blank to get the default feed.
*
* @package WordPress
* @subpackage Feed
* @since 2.5.0
*
* @param int $cat_id ID of a category.
* @param string $feed Optional. Feed type.
* @return string Link to the feed for the category specified by $cat_id.
*/
function get_category_feed_link($cat_id, $feed = '') {
$cat_id = (int) $cat_id;
$category = get_category($cat_id);
if ( empty($category) || is_wp_error($category) )
return false;
if ( empty($feed) )
$feed = get_default_feed();
$permalink_structure = get_option('permalink_structure');
if ( '' == $permalink_structure ) {
$link = get_option('home') . "?feed=$feed&amp;cat=" . $cat_id;
} else {
$link = get_category_link($cat_id);
if( $feed == get_default_feed() )
$feed_link = 'feed';
else
$feed_link = "feed/$feed";
$link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
}
$link = apply_filters('category_feed_link', $link, $feed);
return $link;
}
/**
* Retrieve permalink for feed of tag.
*
* @since 2.3.0
*
* @param int $tag_id Tag ID.
* @param string $feed Optional. Feed type.
* @return string
*/
function get_tag_feed_link($tag_id, $feed = '') {
$tag_id = (int) $tag_id;
$tag = get_tag($tag_id);
if ( empty($tag) || is_wp_error($tag) )
return false;
$permalink_structure = get_option('permalink_structure');
if ( empty($feed) )
$feed = get_default_feed();
if ( '' == $permalink_structure ) {
$link = get_option('home') . "?feed=$feed&amp;tag=" . $tag->slug;
} else {
$link = get_tag_link($tag->term_id);
if ( $feed == get_default_feed() )
$feed_link = 'feed';
else
$feed_link = "feed/$feed";
$link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
}
$link = apply_filters('tag_feed_link', $link, $feed);
return $link;
}
/**
* Retrieve the permalink for the feed of the search results.
*
* @since 2.5.0
*
* @param string $search_query Optional. Search query.
* @param string $feed Optional. Feed type.
* @return string
*/
function get_search_feed_link($search_query = '', $feed = '') {
if ( empty($search_query) )
$search = attribute_escape(get_search_query());
else
$search = attribute_escape(stripslashes($search_query));
if ( empty($feed) )
$feed = get_default_feed();
$link = get_option('home') . "?s=$search&amp;feed=$feed";
$link = apply_filters('search_feed_link', $link);
return $link;
}
/**
* Retrieve the permalink for the comments feed of the search results.
*
* @since 2.5.0
*
* @param string $search_query Optional. Search query.
* @param string $feed Optional. Feed type.
* @return string
*/
function get_search_comments_feed_link($search_query = '', $feed = '') {
if ( empty($search_query) )
$search = attribute_escape(get_search_query());
else
$search = attribute_escape(stripslashes($search_query));
if ( empty($feed) )
$feed = get_default_feed();
$link = get_option('home') . "?s=$search&amp;feed=comments-$feed";
$link = apply_filters('search_feed_link', $link);
return $link;
}
/**
* Retrieve edit posts link for post.
*
* Can be used within the WordPress loop or outside of it. Can be used with
* pages, posts, attachments, and revisions.
*
* @since 2.3.0
*
* @param int $id Optional. Post ID.
* @param string $context Optional, default to display. How to write the '&', defaults to '&amp;'.
* @return string
*/
function get_edit_post_link( $id = 0, $context = 'display' ) {
if ( !$post = &get_post( $id ) )
return;
if ( 'display' == $context )
$action = 'action=edit&amp;';
else
$action = 'action=edit&';
switch ( $post->post_type ) :
case 'page' :
if ( !current_user_can( 'edit_page', $post->ID ) )
return;
$file = 'page';
$var = 'post';
break;
case 'attachment' :
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
$file = 'media';
$var = 'attachment_id';
break;
case 'revision' :
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
$file = 'revision';
$var = 'revision';
$action = '';
break;
default :
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
$file = 'post';
$var = 'post';
break;
endswitch;
return apply_filters( 'get_edit_post_link', admin_url("$file.php?{$action}$var=$post->ID"), $post->ID, $context );
}
/**
* Retrieve edit posts link for post.
*
* @since 1.0.0
*
* @param string $link Optional. Anchor text.
* @param string $before Optional. Display before edit link.
* @param string $after Optional. Display after edit link.
*/
function edit_post_link( $link = 'Edit This', $before = '', $after = '' ) {
global $post;
if ( $post->post_type == 'page' ) {
if ( !current_user_can( 'edit_page', $post->ID ) )
return;
} else {
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
}
$link = '<a href="' . get_edit_post_link( $post->ID ) . '" title="' . __( 'Edit post' ) . '">' . $link . '</a>';
echo $before . apply_filters( 'edit_post_link', $link, $post->ID ) . $after;
}
/**
* Retrieve edit comment link.
*
* @since 2.3.0
*
* @param int $comment_id Optional. Comment ID.
* @return string
*/
function get_edit_comment_link( $comment_id = 0 ) {
$comment = &get_comment( $comment_id );
$post = &get_post( $comment->comment_post_ID );
if ( $post->post_type == 'page' ) {
if ( !current_user_can( 'edit_page', $post->ID ) )
return;
} else {
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
}
$location = admin_url('comment.php?action=editcomment&amp;c=') . $comment->comment_ID;
return apply_filters( 'get_edit_comment_link', $location );
}
/**
* Display or retrieve edit comment link with formatting.
*
* @since 1.0.0
*
* @param string $link Optional. Anchor text.
* @param string $before Optional. Display before edit link.
* @param string $after Optional. Display after edit link.
* @param bool $echo Optional, defaults to true. Whether to echo or return HTML.
* @return string|null HTML content, if $echo is set to false.
*/
function edit_comment_link( $link = 'Edit This', $before = '', $after = '', $echo = true ) {
global $comment, $post;
if ( $post->post_type == 'attachment' ) {
} elseif ( $post->post_type == 'page' ) {
if ( !current_user_can( 'edit_page', $post->ID ) )
return;
} else {
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
}
$link = '<a href="' . get_edit_comment_link( $comment->comment_ID ) . '" title="' . __( 'Edit comment' ) . '">' . $link . '</a>';
$link = $before . apply_filters( 'edit_comment_link', $link, $comment->comment_ID ) . $after;
if ( $echo )
echo $link;
else
return $link;
}
/**
* Display edit bookmark (literally a URL external to blog) link.
*
* @since 2.7.0
*
* @param int $link Optional. Bookmark ID.
* @return string
*/
function get_edit_bookmark_link( $link = 0 ) {
$link = &get_bookmark( $link );
if ( !current_user_can('manage_links') )
return;
$location = admin_url('link.php?action=edit&amp;link_id=') . $link->link_id;
return apply_filters( 'get_edit_bookmark_link', $location, $link->link_id );
}
/**
* Display edit bookmark (literally a URL external to blog) link anchor content.
*
* @since 2.7.0
*
* @param string $link Optional. Anchor text.
* @param string $before Optional. Display before edit link.
* @param string $after Optional. Display after edit link.
* @param int $bookmark Optional. Bookmark ID.
*/
function edit_bookmark_link( $link = '', $before = '', $after = '', $bookmark = null ) {
$bookmark = get_bookmark($bookmark);
if ( !current_user_can('manage_links') )
return;
if ( empty($link) )
$link = __('Edit This');
$link = '<a href="' . get_edit_bookmark_link( $link ) . '" title="' . __( 'Edit link' ) . '">' . $link . '</a>';
echo $before . apply_filters( 'edit_bookmark_link', $link, $bookmark->link_id ) . $after;
}
// Navigation links
/**
* Retrieve previous post link that is adjacent to current post.
*
* @since 1.5.0
*
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
* @return string
*/
function get_previous_post($in_same_cat = false, $excluded_categories = '') {
return get_adjacent_post($in_same_cat, $excluded_categories);
}
/**
* Retrieve next post link that is adjacent to current post.
*
* @since 1.5.0
*
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
* @return string
*/
function get_next_post($in_same_cat = false, $excluded_categories = '') {
return get_adjacent_post($in_same_cat, $excluded_categories, false);
}
/**
* Retrieve adjacent post link.
*
* Can either be next or previous post link.
*
* @since 2.5.0
*
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
* @param bool $previous Optional. Whether to retrieve previous post.
* @return string
*/
function get_adjacent_post($in_same_cat = false, $excluded_categories = '', $previous = true) {
global $post, $wpdb;
if( empty($post) || !is_single() || is_attachment() )
return null;
$current_post_date = $post->post_date;
$join = '';
$posts_in_ex_cats_sql = '';
if ( $in_same_cat || !empty($excluded_categories) ) {
$join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id";
if ( $in_same_cat ) {
$cat_array = wp_get_object_terms($post->ID, 'category', 'fields=ids');
$join .= " AND tt.taxonomy = 'category' AND tt.term_id IN (" . implode(',', $cat_array) . ")";
}
$posts_in_ex_cats_sql = "AND tt.taxonomy = 'category'";
if ( !empty($excluded_categories) ) {
$excluded_categories = array_map('intval', explode(' and ', $excluded_categories));
if ( !empty($cat_array) ) {
$excluded_categories = array_diff($excluded_categories, $cat_array);
$posts_in_ex_cats_sql = '';
}
if ( !empty($excluded_categories) ) {
$posts_in_ex_cats_sql = " AND tt.taxonomy = 'category' AND tt.term_id NOT IN (" . implode($excluded_categories, ',') . ')';
}
}
}
$adjacent = $previous ? 'previous' : 'next';
$op = $previous ? '<' : '>';
$order = $previous ? 'DESC' : 'ASC';
$join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
$where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = 'post' AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date), $in_same_cat, $excluded_categories );
$sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );
return $wpdb->get_row("SELECT p.* FROM $wpdb->posts AS p $join $where $sort");
}
/**
* Display previous post link that is adjacent to the current post.
*
* @since 1.5.0
*
* @param string $format Optional. Link anchor format.
* @param string $link Optional. Link permalink format.
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
*/
function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') {
adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, true);
}
/**
* Display next post link that is adjacent to the current post.
*
* @since 1.5.0
*
* @param string $format Optional. Link anchor format.
* @param string $link Optional. Link permalink format.
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
*/
function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat = false, $excluded_categories = '') {
adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, false);
}
/**
* Display adjacent post link.
*
* Can be either next post link or previous.
*
* @since 2.5.0
*
* @param string $format Link anchor format.
* @param string $link Link permalink format.
* @param bool $in_same_cat Optional. Whether link should be in same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
* @param bool $previous Optional, default is true. Whether display link to previous post.
*/
function adjacent_post_link($format, $link, $in_same_cat = false, $excluded_categories = '', $previous = true) {
if ( $previous && is_attachment() )
$post = & get_post($GLOBALS['post']->post_parent);
else
$post = get_adjacent_post($in_same_cat, $excluded_categories, $previous);
if ( !$post )
return;
$title = $post->post_title;
if ( empty($post->post_title) )
$title = $previous ? __('Previous Post') : __('Next Post');
$title = apply_filters('the_title', $title, $post);
$date = mysql2date(get_option('date_format'), $post->post_date);
$string = '<a href="'.get_permalink($post).'">';
$link = str_replace('%title', $title, $link);
$link = str_replace('%date', $date, $link);
$link = $string . $link . '</a>';
$format = str_replace('%link', $link, $format);
$adjacent = $previous ? 'previous' : 'next';
echo apply_filters( "{$adjacent}_post_link", $format, $link );
}
/**
* Retrieve get links for page numbers.
*
* @since 1.5.0
*
* @param int $pagenum Optional. Page ID.
* @return string
*/
function get_pagenum_link($pagenum = 1) {
global $wp_rewrite;
$pagenum = (int) $pagenum;
$request = remove_query_arg( 'paged' );
$home_root = parse_url(get_option('home'));
$home_root = ( isset($home_root['path']) ) ? $home_root['path'] : '';
$home_root = preg_quote( trailingslashit( $home_root ), '|' );
$request = preg_replace('|^'. $home_root . '|', '', $request);
$request = preg_replace('|^/+|', '', $request);
if ( !$wp_rewrite->using_permalinks() || is_admin() ) {
$base = trailingslashit( get_bloginfo( 'home' ) );
if ( $pagenum > 1 ) {
$result = add_query_arg( 'paged', $pagenum, $base . $request );
} else {
$result = $base . $request;
}
} else {
$qs_regex = '|\?.*?$|';
preg_match( $qs_regex, $request, $qs_match );
if ( !empty( $qs_match[0] ) ) {
$query_string = $qs_match[0];
$request = preg_replace( $qs_regex, '', $request );
} else {
$query_string = '';
}
$request = preg_replace( '|page/\d+/?$|', '', $request);
$request = preg_replace( '|^index\.php|', '', $request);
$request = ltrim($request, '/');
$base = trailingslashit( get_bloginfo( 'url' ) );
if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' != $request ) )
$base .= 'index.php/';
if ( $pagenum > 1 ) {
$request = ( ( !empty( $request ) ) ? trailingslashit( $request ) : $request ) . user_trailingslashit( 'page/' . $pagenum, 'paged' );
}
$result = $base . $request . $query_string;
}
$result = apply_filters('get_pagenum_link', $result);
return $result;
}
/**
* Retrieve next posts pages link.
*
* Backported from 2.1.3 to 2.0.10.
*
* @since 2.0.10
*
* @param int $max_page Optional. Max pages.
* @return string
*/
function get_next_posts_page_link($max_page = 0) {
global $paged;
if ( !is_single() ) {
if ( !$paged )
$paged = 1;
$nextpage = intval($paged) + 1;
if ( !$max_page || $max_page >= $nextpage )
return get_pagenum_link($nextpage);
}
}
/**
* Display the next posts pages link.
*
* @since 0.71
*
* @param int $max_page Optional. Max pages.
*/
function next_posts($max_page = 0) {
echo clean_url(get_next_posts_page_link($max_page));
}
/**
* Display the next posts pages link.
*
* @since 0.71
*
* @param string $label Content for link text.
* @param int $max_page Optional. Max pages.
*/
function next_posts_link($label='Next Page &raquo;', $max_page=0) {
global $paged, $wp_query;
if ( !$max_page ) {
$max_page = $wp_query->max_num_pages;
}
if ( !$paged )
$paged = 1;
$nextpage = intval($paged) + 1;
if ( (! is_single()) && (empty($paged) || $nextpage <= $max_page) ) {
echo '<a href="';
next_posts($max_page);
$attr = apply_filters( 'next_posts_link_attributes', '' );
echo "\" $attr>". preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
}
}
/**
* Retrieve previous post pages link.
*
* Will only return string, if not on a single page or post.
*
* Backported to 2.0.10 from 2.1.3.
*
* @since 2.0.10
*
* @return string|null
*/
function get_previous_posts_page_link() {
global $paged;
if ( !is_single() ) {
$nextpage = intval($paged) - 1;
if ( $nextpage < 1 )
$nextpage = 1;
return get_pagenum_link($nextpage);
}
}
/**
* Display previous posts pages link.
*
* @since 0.71
*/
function previous_posts() {
echo clean_url(get_previous_posts_page_link());
}
/**
* Display previous posts page link.
*
* @since 0.71
*
* @param string $label Optional. Previous page link text.
*/
function previous_posts_link($label='&laquo; Previous Page') {
global $paged;
if ( (!is_single()) && ($paged > 1) ) {
echo '<a href="';
previous_posts();
$attr = apply_filters( 'previous_posts_link_attributes', '' );
echo "\" $attr>". preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
}
}
/**
* Display post pages link navigation for previous and next pages.
*
* @since 0.71
*
* @param string $sep Optional. Separator for posts navigation links.
* @param string $prelabel Optional. Label for previous pages.
* @param string $nxtlabel Optional Label for next pages.
*/
function posts_nav_link($sep=' &#8212; ', $prelabel='&laquo; Previous Page', $nxtlabel='Next Page &raquo;') {
global $wp_query;
if ( !is_singular() ) {
$max_num_pages = $wp_query->max_num_pages;
$paged = get_query_var('paged');
//only have sep if there's both prev and next results
if ($paged < 2 || $paged >= $max_num_pages) {
$sep = '';
}
if ( $max_num_pages > 1 ) {
previous_posts_link($prelabel);
echo preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $sep);
next_posts_link($nxtlabel);
}
}
}
/**
* Retrieve page numbers links.
*
* @since 2.7.0
*
* @param int $pagenum Optional. Page number.
* @return string
*/
function get_comments_pagenum_link($pagenum = 1) {
global $wp_rewrite;
$pagenum = (int) $pagenum;
$request = remove_query_arg( 'cpage' );
$home_root = parse_url(get_option('home'));
$home_root = ( isset($home_root['path']) ) ? $home_root['path'] : '';
$home_root = preg_quote( trailingslashit( $home_root ), '|' );
$request = preg_replace('|^'. $home_root . '|', '', $request);
$request = preg_replace('|^/+|', '', $request);
$base = trailingslashit( get_bloginfo( 'home' ) );
if ( $pagenum > 1 ) {
$result = add_query_arg( 'cpage', $pagenum, $base . $request );
} else {
$result = $base . $request;
}
$result .= '#comments';
$result = apply_filters('get_comments_pagenum_link', $result);
return $result;
}
/**
* Display link to next comments pages.
*
* @since 2.7.0
*
* @param string $label Optional. Label for link text.
* @param int $max_page Optional. Max page.
*/
function next_comments_link($label='', $max_page = 0) {
global $wp_query;
if ( !is_singular() )
return;
$page = get_query_var('cpage');
if ( !$page )
$page = 1;
$nextpage = intval($page) + 1;
if ( empty($max_page) )
$max_page = $wp_query->max_num_comment_pages;
if ( $nextpage > $max_page )
return;
if ( empty($label) )
$label = __('&raquo; Newer Comments');
echo '<a href="' . clean_url(get_comments_pagenum_link($nextpage));
$attr = apply_filters( 'next_comments_link_attributes', '' );
echo "\" $attr>". preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
}
/**
* Display the previous comments page link.
*
* @since 2.7.0
*
* @param string $label Optional. Label for comments link text.
*/
function previous_comments_link($label='') {
global $wp_query;
if ( !is_singular() )
return;
$page = get_query_var('cpage');
if ( !$page )
$page = 1;
if ( $page <= 1 )
return;
$nextpage = intval($page) - 1;
if ( empty($label) )
$label = __('&laquo; Older Comments');
echo '<a href="' . clean_url(get_comments_pagenum_link($nextpage));
$attr = apply_filters( 'previous_comments_link_attributes', '' );
echo "\" $attr>". preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
}
/**
* Create pagination links for the comments on the current post.
*
* @see paginate_links()
* @since 2.7.0
*
* @param string|array $args Optional args. See paginate_links.
* @return string Markup for pagination links.
*/
function paginate_comments_links($args = array()) {
global $wp_query;
if ( !is_singular() )
return;
$page = get_query_var('cpage');
if ( !$page )
$page = 1;
$max_page = $wp_query->max_num_comment_pages;
$defaults = array(
'base' => add_query_arg( 'cpage', '%#%' ),
'format' => '',
'total' => $max_page,
'current' => $page,
'echo' => true,
'add_fragment' => '#comments'
);
$args = wp_parse_args( $args, $defaults );
$page_links = paginate_links( $args );
if ( $args['echo'] )
echo $page_links;
else
return $page_links;
}
/**
* Retrieve shortcut link.
*
* Use this in 'a' element 'href' attribute.
*
* @since 2.6.0
*
* @return string
*/
function get_shortcut_link() {
$link = "javascript:
var d=document,
w=window,
e=w.getSelection,
k=d.getSelection,
x=d.selection,
s=(e?e():(k)?k():(x?x.createRange().text:0)),
f='" . admin_url('press-this.php') . "',
l=d.location,
e=encodeURIComponent,
g=f+'?u='+e(l.href)+'&t='+e(d.title)+'&s='+e(s)+'&v=2';
function a(){
if(!w.open(g,'t','toolbar=0,resizable=0,scrollbars=1,status=1,width=700,height=500')){
l.href=g;
}
}";
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') !== false)
$link .= 'setTimeout(a,0);';
else
$link .= 'a();';
$link .= "void(0);";
$link = str_replace(array("\r", "\n", "\t"), '', $link);
return apply_filters('shortcut_link', $link);
}
/**
* Retrieve the site url.
*
* Returns the 'site_url' option with the appropriate protocol, 'https' if
* is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
* overridden.
*
* @package WordPress
* @since 2.6.0
*
* @param string $path Optional. Path relative to the site url.
* @param string $scheme Optional. Scheme to give the site url context. Currently 'http','https', 'login', 'login_post', or 'admin'.
* @return string Site url link with optional path appended.
*/
function site_url($path = '', $scheme = null) {
// should the list of allowed schemes be maintained elsewhere?
$orig_scheme = $scheme;
if ( !in_array($scheme, array('http', 'https')) ) {
if ( ('login_post' == $scheme) && ( force_ssl_login() || force_ssl_admin() ) )
$scheme = 'https';
elseif ( ('login' == $scheme) && ( force_ssl_admin() ) )
$scheme = 'https';
elseif ( ('admin' == $scheme) && force_ssl_admin() )
$scheme = 'https';
else
$scheme = ( is_ssl() ? 'https' : 'http' );
}
$url = str_replace( 'http://', "{$scheme}://", get_option('siteurl') );
if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
$url .= '/' . ltrim($path, '/');
return apply_filters('site_url', $url, $path, $orig_scheme);
}
/**
* Retrieve the url to the admin area.
*
* @package WordPress
* @since 2.6.0
*
* @param string $path Optional path relative to the admin url
* @return string Admin url link with optional path appended
*/
function admin_url($path = '') {
$url = site_url('wp-admin/', 'admin');
if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
$url .= ltrim($path, '/');
return $url;
}
/**
* Retrieve the url to the includes directory.
*
* @package WordPress
* @since 2.6.0
*
* @param string $path Optional. Path relative to the includes url.
* @return string Includes url link with optional path appended.
*/
function includes_url($path = '') {
$url = site_url() . '/' . WPINC . '/';
if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
$url .= ltrim($path, '/');
return $url;
}
/**
* Retrieve the url to the content directory.
*
* @package WordPress
* @since 2.6.0
*
* @param string $path Optional. Path relative to the content url.
* @return string Content url link with optional path appended.
*/
function content_url($path = '') {
$scheme = ( is_ssl() ? 'https' : 'http' );
$url = WP_CONTENT_URL;
if ( 0 === strpos($url, 'http') ) {
if ( is_ssl() )
$url = str_replace( 'http://', "{$scheme}://", $url );
}
if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
$url .= '/' . ltrim($path, '/');
return $url;
}
/**
* Retrieve the url to the plugins directory.
*
* @package WordPress
* @since 2.6.0
*
* @param string $path Optional. Path relative to the plugins url.
* @return string Plugins url link with optional path appended.
*/
function plugins_url($path = '') {
$scheme = ( is_ssl() ? 'https' : 'http' );
$url = WP_PLUGIN_URL;
if ( 0 === strpos($url, 'http') ) {
if ( is_ssl() )
$url = str_replace( 'http://', "{$scheme}://", $url );
}
if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
$url .= '/' . ltrim($path, '/');
return $url;
}
?>
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