source: trunk/www.guidonia.net/wp/wp-includes/link-template.php@ 44

Last change on this file since 44 was 44, checked in by luciano, 14 years ago
File size: 50.8 KB
Line 
1<?php
2/**
3 * WordPress Link Template Functions
4 *
5 * @package WordPress
6 * @subpackage Template
7 */
8
9/**
10 * Display the permalink for the current post.
11 *
12 * @since 1.2.0
13 * @uses apply_filters() Calls 'the_permalink' filter on the permalink string.
14 */
15function the_permalink() {
16 echo apply_filters('the_permalink', get_permalink());
17}
18
19/**
20 * Retrieve trailing slash string, if blog set for adding trailing slashes.
21 *
22 * Conditionally adds a trailing slash if the permalink structure has a trailing
23 * slash, strips the trailing slash if not. The string is passed through the
24 * 'user_trailingslashit' filter. Will remove trailing slash from string, if
25 * blog is not set to have them.
26 *
27 * @since 2.2.0
28 * @uses $wp_rewrite
29 *
30 * @param $string String a URL with or without a trailing slash.
31 * @param $type_of_url String the type of URL being considered (e.g. single, category, etc) for use in the filter.
32 * @return string
33 */
34function user_trailingslashit($string, $type_of_url = '') {
35 global $wp_rewrite;
36 if ( $wp_rewrite->use_trailing_slashes )
37 $string = trailingslashit($string);
38 else
39 $string = untrailingslashit($string);
40
41 // Note that $type_of_url can be one of following:
42 // single, single_trackback, single_feed, single_paged, feed, category, page, year, month, day, paged
43 $string = apply_filters('user_trailingslashit', $string, $type_of_url);
44 return $string;
45}
46
47/**
48 * Display permalink anchor for current post.
49 *
50 * The permalink mode title will use the post title for the 'a' element 'id'
51 * attribute. The id mode uses 'post-' with the post ID for the 'id' attribute.
52 *
53 * @since 0.71
54 *
55 * @param string $mode Permalink mode can be either 'title', 'id', or default, which is 'id'.
56 */
57function permalink_anchor($mode = 'id') {
58 global $post;
59 switch ( strtolower($mode) ) {
60 case 'title':
61 $title = sanitize_title($post->post_title) . '-' . $post->ID;
62 echo '<a id="'.$title.'"></a>';
63 break;
64 case 'id':
65 default:
66 echo '<a id="post-' . $post->ID . '"></a>';
67 break;
68 }
69}
70
71/**
72 * Retrieve full permalink for current post or post ID.
73 *
74 * @since 1.0.0
75 *
76 * @param int $id Optional. Post ID.
77 * @param bool $leavename Optional, defaults to false. Whether to keep post name or page name.
78 * @return string
79 */
80function get_permalink($id = 0, $leavename = false) {
81 $rewritecode = array(
82 '%year%',
83 '%monthnum%',
84 '%day%',
85 '%hour%',
86 '%minute%',
87 '%second%',
88 $leavename? '' : '%postname%',
89 '%post_id%',
90 '%category%',
91 '%author%',
92 $leavename? '' : '%pagename%',
93 );
94
95 if ( is_object($id) && isset($id->filter) && 'sample' == $id->filter ) {
96 $post = $id;
97 $sample = true;
98 } else {
99 $post = &get_post($id);
100 $sample = false;
101 }
102
103 if ( empty($post->ID) ) return false;
104
105 if ( $post->post_type == 'page' )
106 return get_page_link($post->ID, $leavename, $sample);
107 elseif ($post->post_type == 'attachment')
108 return get_attachment_link($post->ID);
109
110 $permalink = get_option('permalink_structure');
111
112 if ( '' != $permalink && !in_array($post->post_status, array('draft', 'pending')) ) {
113 $unixtime = strtotime($post->post_date);
114
115 $category = '';
116 if ( strpos($permalink, '%category%') !== false ) {
117 $cats = get_the_category($post->ID);
118 if ( $cats ) {
119 usort($cats, '_usort_terms_by_ID'); // order by ID
120 $category = $cats[0]->slug;
121 if ( $parent = $cats[0]->parent )
122 $category = get_category_parents($parent, false, '/', true) . $category;
123 }
124 // show default category in permalinks, without
125 // having to assign it explicitly
126 if ( empty($category) ) {
127 $default_category = get_category( get_option( 'default_category' ) );
128 $category = is_wp_error( $default_category ) ? '' : $default_category->slug;
129 }
130 }
131
132 $author = '';
133 if ( strpos($permalink, '%author%') !== false ) {
134 $authordata = get_userdata($post->post_author);
135 $author = $authordata->user_nicename;
136 }
137
138 $date = explode(" ",date('Y m d H i s', $unixtime));
139 $rewritereplace =
140 array(
141 $date[0],
142 $date[1],
143 $date[2],
144 $date[3],
145 $date[4],
146 $date[5],
147 $post->post_name,
148 $post->ID,
149 $category,
150 $author,
151 $post->post_name,
152 );
153 $permalink = get_option('home') . str_replace($rewritecode, $rewritereplace, $permalink);
154 $permalink = user_trailingslashit($permalink, 'single');
155 return apply_filters('post_link', $permalink, $post, $leavename);
156 } else { // if they're not using the fancy permalink option
157 $permalink = trailingslashit(get_option('home')) . '?p=' . $post->ID;
158 return apply_filters('post_link', $permalink, $post, $leavename);
159 }
160}
161
162/**
163 * Retrieve permalink from post ID.
164 *
165 * @since 1.0.0
166 *
167 * @param int $post_id Optional. Post ID.
168 * @param mixed $deprecated Not used.
169 * @return string
170 */
171function post_permalink($post_id = 0, $deprecated = '') {
172 return get_permalink($post_id);
173}
174
175/**
176 * Retrieve the permalink for current page or page ID.
177 *
178 * Respects page_on_front. Use this one.
179 *
180 * @since 1.5.0
181 *
182 * @param int $id Optional. Post ID.
183 * @param bool $leavename Optional, defaults to false. Whether to keep page name.
184 * @param bool $sample Optional, defaults to false. Is it a sample permalink.
185 * @return string
186 */
187function get_page_link( $id = false, $leavename = false, $sample = false ) {
188 global $post;
189
190 $id = (int) $id;
191 if ( !$id )
192 $id = (int) $post->ID;
193
194 if ( 'page' == get_option('show_on_front') && $id == get_option('page_on_front') )
195 $link = get_option('home');
196 else
197 $link = _get_page_link( $id , $leavename, $sample );
198
199 return apply_filters('page_link', $link, $id);
200}
201
202/**
203 * Retrieve the page permalink.
204 *
205 * Ignores page_on_front. Internal use only.
206 *
207 * @since 2.1.0
208 * @access private
209 *
210 * @param int $id Optional. Post ID.
211 * @param bool $leavename Optional. Leave name.
212 * @param bool $sample Optional. Sample permalink.
213 * @return string
214 */
215function _get_page_link( $id = false, $leavename = false, $sample = false ) {
216 global $post, $wp_rewrite;
217
218 if ( !$id )
219 $id = (int) $post->ID;
220 else
221 $post = &get_post($id);
222
223 $pagestruct = $wp_rewrite->get_page_permastruct();
224
225 if ( '' != $pagestruct && ( ( isset($post->post_status) && 'draft' != $post->post_status ) || $sample ) ) {
226 $link = get_page_uri($id);
227 $link = ( $leavename ) ? $pagestruct : str_replace('%pagename%', $link, $pagestruct);
228 $link = trailingslashit(get_option('home')) . "$link";
229 $link = user_trailingslashit($link, 'page');
230 } else {
231 $link = trailingslashit(get_option('home')) . "?page_id=$id";
232 }
233
234 return apply_filters( '_get_page_link', $link, $id );
235}
236
237/**
238 * Retrieve permalink for attachment.
239 *
240 * This can be used in the WordPress Loop or outside of it.
241 *
242 * @since 2.0.0
243 *
244 * @param int $id Optional. Post ID.
245 * @return string
246 */
247function get_attachment_link($id = false) {
248 global $post, $wp_rewrite;
249
250 $link = false;
251
252 if (! $id) {
253 $id = (int) $post->ID;
254 }
255
256 $object = get_post($id);
257 if ( $wp_rewrite->using_permalinks() && ($object->post_parent > 0) && ($object->post_parent != $id) ) {
258 $parent = get_post($object->post_parent);
259 if ( 'page' == $parent->post_type )
260 $parentlink = _get_page_link( $object->post_parent ); // Ignores page_on_front
261 else
262 $parentlink = get_permalink( $object->post_parent );
263 if ( is_numeric($object->post_name) || false !== strpos(get_option('permalink_structure'), '%category%') )
264 $name = 'attachment/' . $object->post_name; // <permalink>/<int>/ is paged so we use the explicit attachment marker
265 else
266 $name = $object->post_name;
267 if (strpos($parentlink, '?') === false)
268 $link = user_trailingslashit( trailingslashit($parentlink) . $name );
269 }
270
271 if (! $link ) {
272 $link = trailingslashit(get_bloginfo('url')) . "?attachment_id=$id";
273 }
274
275 return apply_filters('attachment_link', $link, $id);
276}
277
278/**
279 * Retrieve the permalink for the year archives.
280 *
281 * @since 1.5.0
282 *
283 * @param int|bool $year False for current year or year for permalink.
284 * @return string
285 */
286function get_year_link($year) {
287 global $wp_rewrite;
288 if ( !$year )
289 $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
290 $yearlink = $wp_rewrite->get_year_permastruct();
291 if ( !empty($yearlink) ) {
292 $yearlink = str_replace('%year%', $year, $yearlink);
293 return apply_filters('year_link', get_option('home') . user_trailingslashit($yearlink, 'year'), $year);
294 } else {
295 return apply_filters('year_link', trailingslashit(get_option('home')) . '?m=' . $year, $year);
296 }
297}
298
299/**
300 * Retrieve the permalink for the month archives with year.
301 *
302 * @since 1.0.0
303 *
304 * @param bool|int $year False for current year. Integer of year.
305 * @param bool|int $month False for current month. Integer of month.
306 * @return string
307 */
308function get_month_link($year, $month) {
309 global $wp_rewrite;
310 if ( !$year )
311 $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
312 if ( !$month )
313 $month = gmdate('m', time()+(get_option('gmt_offset') * 3600));
314 $monthlink = $wp_rewrite->get_month_permastruct();
315 if ( !empty($monthlink) ) {
316 $monthlink = str_replace('%year%', $year, $monthlink);
317 $monthlink = str_replace('%monthnum%', zeroise(intval($month), 2), $monthlink);
318 return apply_filters('month_link', get_option('home') . user_trailingslashit($monthlink, 'month'), $year, $month);
319 } else {
320 return apply_filters('month_link', trailingslashit(get_option('home')) . '?m=' . $year . zeroise($month, 2), $year, $month);
321 }
322}
323
324/**
325 * Retrieve the permalink for the day archives with year and month.
326 *
327 * @since 1.0.0
328 *
329 * @param bool|int $year False for current year. Integer of year.
330 * @param bool|int $month False for current month. Integer of month.
331 * @param bool|int $day False for current day. Integer of day.
332 * @return string
333 */
334function get_day_link($year, $month, $day) {
335 global $wp_rewrite;
336 if ( !$year )
337 $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600));
338 if ( !$month )
339 $month = gmdate('m', time()+(get_option('gmt_offset') * 3600));
340 if ( !$day )
341 $day = gmdate('j', time()+(get_option('gmt_offset') * 3600));
342
343 $daylink = $wp_rewrite->get_day_permastruct();
344 if ( !empty($daylink) ) {
345 $daylink = str_replace('%year%', $year, $daylink);
346 $daylink = str_replace('%monthnum%', zeroise(intval($month), 2), $daylink);
347 $daylink = str_replace('%day%', zeroise(intval($day), 2), $daylink);
348 return apply_filters('day_link', get_option('home') . user_trailingslashit($daylink, 'day'), $year, $month, $day);
349 } else {
350 return apply_filters('day_link', trailingslashit(get_option('home')) . '?m=' . $year . zeroise($month, 2) . zeroise($day, 2), $year, $month, $day);
351 }
352}
353
354/**
355 * Retrieve the permalink for the feed type.
356 *
357 * @since 1.5.0
358 *
359 * @param string $feed Optional, defaults to default feed. Feed type.
360 * @return string
361 */
362function get_feed_link($feed = '') {
363 global $wp_rewrite;
364
365 $permalink = $wp_rewrite->get_feed_permastruct();
366 if ( '' != $permalink ) {
367 if ( false !== strpos($feed, 'comments_') ) {
368 $feed = str_replace('comments_', '', $feed);
369 $permalink = $wp_rewrite->get_comment_feed_permastruct();
370 }
371
372 if ( get_default_feed() == $feed )
373 $feed = '';
374
375 $permalink = str_replace('%feed%', $feed, $permalink);
376 $permalink = preg_replace('#/+#', '/', "/$permalink");
377 $output = get_option('home') . user_trailingslashit($permalink, 'feed');
378 } else {
379 if ( empty($feed) )
380 $feed = get_default_feed();
381
382 if ( false !== strpos($feed, 'comments_') )
383 $feed = str_replace('comments_', 'comments-', $feed);
384
385 $output = trailingslashit(get_option('home')) . "?feed={$feed}";
386 }
387
388 return apply_filters('feed_link', $output, $feed);
389}
390
391/**
392 * Retrieve the permalink for the post comments feed.
393 *
394 * @since 2.2.0
395 *
396 * @param int $post_id Optional. Post ID.
397 * @param string $feed Optional. Feed type.
398 * @return string
399 */
400function get_post_comments_feed_link($post_id = '', $feed = '') {
401 global $id;
402
403 if ( empty($post_id) )
404 $post_id = (int) $id;
405
406 if ( empty($feed) )
407 $feed = get_default_feed();
408
409 if ( '' != get_option('permalink_structure') ) {
410 $url = trailingslashit( get_permalink($post_id) ) . 'feed';
411 if ( $feed != get_default_feed() )
412 $url .= "/$feed";
413 $url = user_trailingslashit($url, 'single_feed');
414 } else {
415 $type = get_post_field('post_type', $post_id);
416 if ( 'page' == $type )
417 $url = trailingslashit(get_option('home')) . "?feed=$feed&amp;page_id=$post_id";
418 else
419 $url = trailingslashit(get_option('home')) . "?feed=$feed&amp;p=$post_id";
420 }
421
422 return apply_filters('post_comments_feed_link', $url);
423}
424
425/**
426 * Display the comment feed link for a post.
427 *
428 * Prints out the comment feed link for a post. Link text is placed in the
429 * anchor. If no link text is specified, default text is used. If no post ID is
430 * specified, the current post is used.
431 *
432 * @package WordPress
433 * @subpackage Feed
434 * @since 2.5.0
435 *
436 * @param string $link_text Descriptive text.
437 * @param int $post_id Optional post ID. Default to current post.
438 * @param string $feed Optional. Feed format.
439 * @return string Link to the comment feed for the current post.
440*/
441function post_comments_feed_link( $link_text = '', $post_id = '', $feed = '' ) {
442 $url = get_post_comments_feed_link($post_id, $feed);
443 if ( empty($link_text) )
444 $link_text = __('Comments Feed');
445
446 echo apply_filters( 'post_comments_feed_link_html', "<a href='$url'>$link_text</a>", $post_id, $feed );
447}
448
449/**
450 * Retrieve the feed link for a given author.
451 *
452 * Returns a link to the feed for all posts by a given author. A specific feed
453 * can be requested or left blank to get the default feed.
454 *
455 * @package WordPress
456 * @subpackage Feed
457 * @since 2.5.0
458 *
459 * @param int $author_id ID of an author.
460 * @param string $feed Optional. Feed type.
461 * @return string Link to the feed for the author specified by $author_id.
462*/
463function get_author_feed_link( $author_id, $feed = '' ) {
464 $author_id = (int) $author_id;
465 $permalink_structure = get_option('permalink_structure');
466
467 if ( empty($feed) )
468 $feed = get_default_feed();
469
470 if ( '' == $permalink_structure ) {
471 $link = trailingslashit(get_option('home')) . "?feed=$feed&amp;author=" . $author_id;
472 } else {
473 $link = get_author_posts_url($author_id);
474 if ( $feed == get_default_feed() )
475 $feed_link = 'feed';
476 else
477 $feed_link = "feed/$feed";
478
479 $link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
480 }
481
482 $link = apply_filters('author_feed_link', $link, $feed);
483
484 return $link;
485}
486
487/**
488 * Retrieve the feed link for a category.
489 *
490 * Returns a link to the feed for all post in a given category. A specific feed
491 * can be requested or left blank to get the default feed.
492 *
493 * @package WordPress
494 * @subpackage Feed
495 * @since 2.5.0
496 *
497 * @param int $cat_id ID of a category.
498 * @param string $feed Optional. Feed type.
499 * @return string Link to the feed for the category specified by $cat_id.
500*/
501function get_category_feed_link($cat_id, $feed = '') {
502 $cat_id = (int) $cat_id;
503
504 $category = get_category($cat_id);
505
506 if ( empty($category) || is_wp_error($category) )
507 return false;
508
509 if ( empty($feed) )
510 $feed = get_default_feed();
511
512 $permalink_structure = get_option('permalink_structure');
513
514 if ( '' == $permalink_structure ) {
515 $link = trailingslashit(get_option('home')) . "?feed=$feed&amp;cat=" . $cat_id;
516 } else {
517 $link = get_category_link($cat_id);
518 if( $feed == get_default_feed() )
519 $feed_link = 'feed';
520 else
521 $feed_link = "feed/$feed";
522
523 $link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
524 }
525
526 $link = apply_filters('category_feed_link', $link, $feed);
527
528 return $link;
529}
530
531/**
532 * Retrieve permalink for feed of tag.
533 *
534 * @since 2.3.0
535 *
536 * @param int $tag_id Tag ID.
537 * @param string $feed Optional. Feed type.
538 * @return string
539 */
540function get_tag_feed_link($tag_id, $feed = '') {
541 $tag_id = (int) $tag_id;
542
543 $tag = get_tag($tag_id);
544
545 if ( empty($tag) || is_wp_error($tag) )
546 return false;
547
548 $permalink_structure = get_option('permalink_structure');
549
550 if ( empty($feed) )
551 $feed = get_default_feed();
552
553 if ( '' == $permalink_structure ) {
554 $link = trailingslashit(get_option('home')) . "?feed=$feed&amp;tag=" . $tag->slug;
555 } else {
556 $link = get_tag_link($tag->term_id);
557 if ( $feed == get_default_feed() )
558 $feed_link = 'feed';
559 else
560 $feed_link = "feed/$feed";
561 $link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
562 }
563
564 $link = apply_filters('tag_feed_link', $link, $feed);
565
566 return $link;
567}
568
569/**
570 * Retrieve edit tag link.
571 *
572 * @since 2.7.0
573 *
574 * @param int $tag_id Tag ID
575 * @return string
576 */
577function get_edit_tag_link( $tag_id = 0, $taxonomy = 'post_tag' ) {
578 $tag = get_term($tag_id, $taxonomy);
579
580 if ( !current_user_can('manage_categories') )
581 return;
582
583 $location = admin_url('edit-tags.php?action=edit&amp;taxonomy=' . $taxonomy . '&amp;tag_ID=' . $tag->term_id);
584 return apply_filters( 'get_edit_tag_link', $location );
585}
586
587/**
588 * Display or retrieve edit tag link with formatting.
589 *
590 * @since 2.7.0
591 *
592 * @param string $link Optional. Anchor text.
593 * @param string $before Optional. Display before edit link.
594 * @param string $after Optional. Display after edit link.
595 * @param int|object $tag Tag object or ID
596 * @return string|null HTML content, if $echo is set to false.
597 */
598function edit_tag_link( $link = '', $before = '', $after = '', $tag = null ) {
599 $tag = get_term($tag, 'post_tag');
600
601 if ( !current_user_can('manage_categories') )
602 return;
603
604 if ( empty($link) )
605 $link = __('Edit This');
606
607 $link = '<a href="' . get_edit_tag_link( $tag->term_id ) . '" title="' . __( 'Edit tag' ) . '">' . $link . '</a>';
608 echo $before . apply_filters( 'edit_tag_link', $link, $tag->term_id ) . $after;
609}
610
611/**
612 * Retrieve the permalink for the feed of the search results.
613 *
614 * @since 2.5.0
615 *
616 * @param string $search_query Optional. Search query.
617 * @param string $feed Optional. Feed type.
618 * @return string
619 */
620function get_search_feed_link($search_query = '', $feed = '') {
621 if ( empty($search_query) )
622 $search = esc_attr(get_search_query());
623 else
624 $search = esc_attr(stripslashes($search_query));
625
626 if ( empty($feed) )
627 $feed = get_default_feed();
628
629 $link = trailingslashit(get_option('home')) . "?s=$search&amp;feed=$feed";
630
631 $link = apply_filters('search_feed_link', $link);
632
633 return $link;
634}
635
636/**
637 * Retrieve the permalink for the comments feed of the search results.
638 *
639 * @since 2.5.0
640 *
641 * @param string $search_query Optional. Search query.
642 * @param string $feed Optional. Feed type.
643 * @return string
644 */
645function get_search_comments_feed_link($search_query = '', $feed = '') {
646 if ( empty($search_query) )
647 $search = esc_attr(get_search_query());
648 else
649 $search = esc_attr(stripslashes($search_query));
650
651 if ( empty($feed) )
652 $feed = get_default_feed();
653
654 $link = trailingslashit(get_option('home')) . "?s=$search&amp;feed=comments-$feed";
655
656 $link = apply_filters('search_feed_link', $link);
657
658 return $link;
659}
660
661/**
662 * Retrieve edit posts link for post.
663 *
664 * Can be used within the WordPress loop or outside of it. Can be used with
665 * pages, posts, attachments, and revisions.
666 *
667 * @since 2.3.0
668 *
669 * @param int $id Optional. Post ID.
670 * @param string $context Optional, default to display. How to write the '&', defaults to '&amp;'.
671 * @return string
672 */
673function get_edit_post_link( $id = 0, $context = 'display' ) {
674 if ( !$post = &get_post( $id ) )
675 return;
676
677 if ( 'display' == $context )
678 $action = 'action=edit&amp;';
679 else
680 $action = 'action=edit&';
681
682 switch ( $post->post_type ) :
683 case 'page' :
684 if ( !current_user_can( 'edit_page', $post->ID ) )
685 return;
686 $file = 'page';
687 $var = 'post';
688 break;
689 case 'attachment' :
690 if ( !current_user_can( 'edit_post', $post->ID ) )
691 return;
692 $file = 'media';
693 $var = 'attachment_id';
694 break;
695 case 'revision' :
696 if ( !current_user_can( 'edit_post', $post->ID ) )
697 return;
698 $file = 'revision';
699 $var = 'revision';
700 $action = '';
701 break;
702 default :
703 if ( !current_user_can( 'edit_post', $post->ID ) )
704 return;
705 $file = 'post';
706 $var = 'post';
707 break;
708 endswitch;
709
710 return apply_filters( 'get_edit_post_link', admin_url("$file.php?{$action}$var=$post->ID"), $post->ID, $context );
711}
712
713/**
714 * Display edit post link for post.
715 *
716 * @since 1.0.0
717 *
718 * @param string $link Optional. Anchor text.
719 * @param string $before Optional. Display before edit link.
720 * @param string $after Optional. Display after edit link.
721 * @param int $id Optional. Post ID.
722 */
723function edit_post_link( $link = 'Edit This', $before = '', $after = '', $id = 0 ) {
724 if ( !$post = &get_post( $id ) )
725 return;
726
727 if ( !$url = get_edit_post_link( $post->ID ) )
728 return;
729
730 $link = '<a class="post-edit-link" href="' . $url . '" title="' . esc_attr( __( 'Edit post' ) ) . '">' . $link . '</a>';
731 echo $before . apply_filters( 'edit_post_link', $link, $post->ID ) . $after;
732}
733
734/**
735 * Retrieve edit comment link.
736 *
737 * @since 2.3.0
738 *
739 * @param int $comment_id Optional. Comment ID.
740 * @return string
741 */
742function get_edit_comment_link( $comment_id = 0 ) {
743 $comment = &get_comment( $comment_id );
744 $post = &get_post( $comment->comment_post_ID );
745
746 if ( $post->post_type == 'page' ) {
747 if ( !current_user_can( 'edit_page', $post->ID ) )
748 return;
749 } else {
750 if ( !current_user_can( 'edit_post', $post->ID ) )
751 return;
752 }
753
754 $location = admin_url('comment.php?action=editcomment&amp;c=') . $comment->comment_ID;
755 return apply_filters( 'get_edit_comment_link', $location );
756}
757
758/**
759 * Display or retrieve edit comment link with formatting.
760 *
761 * @since 1.0.0
762 *
763 * @param string $link Optional. Anchor text.
764 * @param string $before Optional. Display before edit link.
765 * @param string $after Optional. Display after edit link.
766 * @return string|null HTML content, if $echo is set to false.
767 */
768function edit_comment_link( $link = 'Edit This', $before = '', $after = '' ) {
769 global $comment, $post;
770
771 if ( $post->post_type == 'attachment' ) {
772 } elseif ( $post->post_type == 'page' ) {
773 if ( !current_user_can( 'edit_page', $post->ID ) )
774 return;
775 } else {
776 if ( !current_user_can( 'edit_post', $post->ID ) )
777 return;
778 }
779
780 $link = '<a class="comment-edit-link" href="' . get_edit_comment_link( $comment->comment_ID ) . '" title="' . __( 'Edit comment' ) . '">' . $link . '</a>';
781 echo $before . apply_filters( 'edit_comment_link', $link, $comment->comment_ID ) . $after;
782}
783
784/**
785 * Display edit bookmark (literally a URL external to blog) link.
786 *
787 * @since 2.7.0
788 *
789 * @param int $link Optional. Bookmark ID.
790 * @return string
791 */
792function get_edit_bookmark_link( $link = 0 ) {
793 $link = get_bookmark( $link );
794
795 if ( !current_user_can('manage_links') )
796 return;
797
798 $location = admin_url('link.php?action=edit&amp;link_id=') . $link->link_id;
799 return apply_filters( 'get_edit_bookmark_link', $location, $link->link_id );
800}
801
802/**
803 * Display edit bookmark (literally a URL external to blog) link anchor content.
804 *
805 * @since 2.7.0
806 *
807 * @param string $link Optional. Anchor text.
808 * @param string $before Optional. Display before edit link.
809 * @param string $after Optional. Display after edit link.
810 * @param int $bookmark Optional. Bookmark ID.
811 */
812function edit_bookmark_link( $link = '', $before = '', $after = '', $bookmark = null ) {
813 $bookmark = get_bookmark($bookmark);
814
815 if ( !current_user_can('manage_links') )
816 return;
817
818 if ( empty($link) )
819 $link = __('Edit This');
820
821 $link = '<a href="' . get_edit_bookmark_link( $link ) . '" title="' . __( 'Edit link' ) . '">' . $link . '</a>';
822 echo $before . apply_filters( 'edit_bookmark_link', $link, $bookmark->link_id ) . $after;
823}
824
825// Navigation links
826
827/**
828 * Retrieve previous post link that is adjacent to current post.
829 *
830 * @since 1.5.0
831 *
832 * @param bool $in_same_cat Optional. Whether link should be in same category.
833 * @param string $excluded_categories Optional. Excluded categories IDs.
834 * @return string
835 */
836function get_previous_post($in_same_cat = false, $excluded_categories = '') {
837 return get_adjacent_post($in_same_cat, $excluded_categories);
838}
839
840/**
841 * Retrieve next post link that is adjacent to current post.
842 *
843 * @since 1.5.0
844 *
845 * @param bool $in_same_cat Optional. Whether link should be in same category.
846 * @param string $excluded_categories Optional. Excluded categories IDs.
847 * @return string
848 */
849function get_next_post($in_same_cat = false, $excluded_categories = '') {
850 return get_adjacent_post($in_same_cat, $excluded_categories, false);
851}
852
853/**
854 * Retrieve adjacent post link.
855 *
856 * Can either be next or previous post link.
857 *
858 * @since 2.5.0
859 *
860 * @param bool $in_same_cat Optional. Whether link should be in same category.
861 * @param string $excluded_categories Optional. Excluded categories IDs.
862 * @param bool $previous Optional. Whether to retrieve previous post.
863 * @return string
864 */
865function get_adjacent_post($in_same_cat = false, $excluded_categories = '', $previous = true) {
866 global $post, $wpdb;
867
868 if ( empty($post) || !is_single() || is_attachment() )
869 return null;
870
871 $current_post_date = $post->post_date;
872
873 $join = '';
874 $posts_in_ex_cats_sql = '';
875 if ( $in_same_cat || !empty($excluded_categories) ) {
876 $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";
877
878 if ( $in_same_cat ) {
879 $cat_array = wp_get_object_terms($post->ID, 'category', 'fields=ids');
880 $join .= " AND tt.taxonomy = 'category' AND tt.term_id IN (" . implode(',', $cat_array) . ")";
881 }
882
883 $posts_in_ex_cats_sql = "AND tt.taxonomy = 'category'";
884 if ( !empty($excluded_categories) ) {
885 $excluded_categories = array_map('intval', explode(' and ', $excluded_categories));
886 if ( !empty($cat_array) ) {
887 $excluded_categories = array_diff($excluded_categories, $cat_array);
888 $posts_in_ex_cats_sql = '';
889 }
890
891 if ( !empty($excluded_categories) ) {
892 $posts_in_ex_cats_sql = " AND tt.taxonomy = 'category' AND tt.term_id NOT IN (" . implode($excluded_categories, ',') . ')';
893 }
894 }
895 }
896
897 $adjacent = $previous ? 'previous' : 'next';
898 $op = $previous ? '<' : '>';
899 $order = $previous ? 'DESC' : 'ASC';
900
901 $join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
902 $where = apply_filters( "get_{$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 );
903 $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );
904
905 $query = "SELECT p.* FROM $wpdb->posts AS p $join $where $sort";
906 $query_key = 'adjacent_post_' . md5($query);
907 $result = wp_cache_get($query_key, 'counts');
908 if ( false !== $result )
909 return $result;
910
911 $result = $wpdb->get_row("SELECT p.* FROM $wpdb->posts AS p $join $where $sort");
912 if ( null === $result )
913 $result = '';
914
915 wp_cache_set($query_key, $result, 'counts');
916 return $result;
917}
918
919/**
920 * Get adjacent post relational link.
921 *
922 * Can either be next or previous post relational link.
923 *
924 * @since 2.8.0
925 *
926 * @param string $title Optional. Link title format.
927 * @param bool $in_same_cat Optional. Whether link should be in same category.
928 * @param string $excluded_categories Optional. Excluded categories IDs.
929 * @param bool $previous Optional, default is true. Whether display link to previous post.
930 * @return string
931 */
932function get_adjacent_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '', $previous = true) {
933 if ( $previous && is_attachment() )
934 $post = & get_post($GLOBALS['post']->post_parent);
935 else
936 $post = get_adjacent_post($in_same_cat,$excluded_categories,$previous);
937
938 if ( empty($post) )
939 return;
940
941 if ( empty($post->post_title) )
942 $post->post_title = $previous ? __('Previous Post') : __('Next Post');
943
944 $date = mysql2date(get_option('date_format'), $post->post_date);
945
946 $title = str_replace('%title', $post->post_title, $title);
947 $title = str_replace('%date', $date, $title);
948 $title = apply_filters('the_title', $title, $post);
949
950 $link = $previous ? "<link rel='prev' title='" : "<link rel='next' title='";
951 $link .= esc_attr( $title );
952 $link .= "' href='" . get_permalink($post) . "' />\n";
953
954 $adjacent = $previous ? 'previous' : 'next';
955 return apply_filters( "{$adjacent}_post_rel_link", $link );
956}
957
958/**
959 * Display relational links for the posts adjacent to the current post.
960 *
961 * @since 2.8.0
962 *
963 * @param string $title Optional. Link title format.
964 * @param bool $in_same_cat Optional. Whether link should be in same category.
965 * @param string $excluded_categories Optional. Excluded categories IDs.
966 */
967function adjacent_posts_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '') {
968 echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', true);
969 echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', false);
970}
971
972/**
973 * Display relational link for the next post adjacent to the current post.
974 *
975 * @since 2.8.0
976 *
977 * @param string $title Optional. Link title format.
978 * @param bool $in_same_cat Optional. Whether link should be in same category.
979 * @param string $excluded_categories Optional. Excluded categories IDs.
980 */
981function next_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '') {
982 echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', false);
983}
984
985/**
986 * Display relational link for the previous post adjacent to the current post.
987 *
988 * @since 2.8.0
989 *
990 * @param string $title Optional. Link title format.
991 * @param bool $in_same_cat Optional. Whether link should be in same category.
992 * @param string $excluded_categories Optional. Excluded categories IDs.
993 */
994function prev_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '') {
995 echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', true);
996}
997
998/**
999 * Retrieve boundary post.
1000 *
1001 * Boundary being either the first or last post by publish date within the contraitns specified
1002 * by in same category or excluded categories.
1003 *
1004 * @since 2.8.0
1005 *
1006 * @param bool $in_same_cat Optional. Whether returned post should be in same category.
1007 * @param string $excluded_categories Optional. Excluded categories IDs.
1008 * @param bool $previous Optional. Whether to retrieve first post.
1009 * @return object
1010 */
1011function get_boundary_post($in_same_cat = false, $excluded_categories = '', $start = true) {
1012 global $post, $wpdb;
1013
1014 if ( empty($post) || !is_single() || is_attachment() )
1015 return null;
1016
1017 $cat_array = array();
1018 $excluded_categories = array();
1019 if ( !empty($in_same_cat) || !empty($excluded_categories) ) {
1020 if ( !empty($in_same_cat) ) {
1021 $cat_array = wp_get_object_terms($post->ID, 'category', 'fields=ids');
1022 }
1023
1024 if ( !empty($excluded_categories) ) {
1025 $excluded_categories = array_map('intval', explode(',', $excluded_categories));
1026
1027 if ( !empty($cat_array) )
1028 $excluded_categories = array_diff($excluded_categories, $cat_array);
1029
1030 $inverse_cats = array();
1031 foreach ( $excluded_categories as $excluded_category)
1032 $inverse_cats[] = $excluded_category * -1;
1033 $excluded_categories = $inverse_cats;
1034 }
1035 }
1036
1037 $categories = implode(',', array_merge($cat_array, $excluded_categories) );
1038
1039 $order = $start ? 'ASC' : 'DESC';
1040
1041 return get_posts( array('numberposts' => 1, 'order' => $order, 'orderby' => 'ID', 'category' => $categories) );
1042}
1043
1044/**
1045 * Get boundary post relational link.
1046 *
1047 * Can either be start or end post relational link.
1048 *
1049 * @since 2.8.0
1050 *
1051 * @param string $title Optional. Link title format.
1052 * @param bool $in_same_cat Optional. Whether link should be in same category.
1053 * @param string $excluded_categories Optional. Excluded categories IDs.
1054 * @param bool $start Optional, default is true. Whether display link to first post.
1055 * @return string
1056 */
1057function get_boundary_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '', $start = true) {
1058 $posts = get_boundary_post($in_same_cat,$excluded_categories,$start);
1059 // Even though we limited get_posts to return only 1 item it still returns an array of objects.
1060 $post = $posts[0];
1061
1062 if ( empty($post) )
1063 return;
1064
1065 if ( empty($post->post_title) )
1066 $post->post_title = $start ? __('First Post') : __('Last Post');
1067
1068 $date = mysql2date(get_option('date_format'), $post->post_date);
1069
1070 $title = str_replace('%title', $post->post_title, $title);
1071 $title = str_replace('%date', $date, $title);
1072 $title = apply_filters('the_title', $title, $post);
1073
1074 $link = $start ? "<link rel='start' title='" : "<link rel='end' title='";
1075 $link .= esc_attr($title);
1076 $link .= "' href='" . get_permalink($post) . "' />\n";
1077
1078 $boundary = $start ? 'start' : 'end';
1079 return apply_filters( "{$boundary}_post_rel_link", $link );
1080}
1081
1082/**
1083 * Display relational link for the first post.
1084 *
1085 * @since 2.8.0
1086 *
1087 * @param string $title Optional. Link title format.
1088 * @param bool $in_same_cat Optional. Whether link should be in same category.
1089 * @param string $excluded_categories Optional. Excluded categories IDs.
1090 */
1091function start_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '') {
1092 echo get_boundary_post_rel_link($title, $in_same_cat, $excluded_categories, true);
1093}
1094
1095/**
1096 * Get site index relational link.
1097 *
1098 * @since 2.8.0
1099 *
1100 * @return string
1101 */
1102function get_index_rel_link() {
1103 $link = "<link rel='index' title='" . esc_attr(get_bloginfo('name')) . "' href='" . get_bloginfo('siteurl') . "' />\n";
1104 return apply_filters( "index_rel_link", $link );
1105}
1106
1107/**
1108 * Display relational link for the site index.
1109 *
1110 * @since 2.8.0
1111 */
1112function index_rel_link() {
1113 echo get_index_rel_link();
1114}
1115
1116/**
1117 * Get parent post relational link.
1118 *
1119 * @since 2.8.0
1120 *
1121 * @param string $title Optional. Link title format.
1122 * @return string
1123 */
1124function get_parent_post_rel_link($title = '%title') {
1125 if ( ! empty( $GLOBALS['post'] ) && ! empty( $GLOBALS['post']->post_parent ) )
1126 $post = & get_post($GLOBALS['post']->post_parent);
1127
1128 if ( empty($post) )
1129 return;
1130
1131 $date = mysql2date(get_option('date_format'), $post->post_date);
1132
1133 $title = str_replace('%title', $post->post_title, $title);
1134 $title = str_replace('%date', $date, $title);
1135 $title = apply_filters('the_title', $title, $post);
1136
1137 $link = "<link rel='up' title='";
1138 $link .= esc_attr( $title );
1139 $link .= "' href='" . get_permalink($post) . "' />\n";
1140
1141 return apply_filters( "parent_post_rel_link", $link );
1142}
1143
1144/**
1145 * Display relational link for parent item
1146 *
1147 * @since 2.8.0
1148 */
1149function parent_post_rel_link($title = '%title') {
1150 echo get_parent_post_rel_link($title);
1151}
1152
1153/**
1154 * Display previous post link that is adjacent to the current post.
1155 *
1156 * @since 1.5.0
1157 *
1158 * @param string $format Optional. Link anchor format.
1159 * @param string $link Optional. Link permalink format.
1160 * @param bool $in_same_cat Optional. Whether link should be in same category.
1161 * @param string $excluded_categories Optional. Excluded categories IDs.
1162 */
1163function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') {
1164 adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, true);
1165}
1166
1167/**
1168 * Display next post link that is adjacent to the current post.
1169 *
1170 * @since 1.5.0
1171 *
1172 * @param string $format Optional. Link anchor format.
1173 * @param string $link Optional. Link permalink format.
1174 * @param bool $in_same_cat Optional. Whether link should be in same category.
1175 * @param string $excluded_categories Optional. Excluded categories IDs.
1176 */
1177function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat = false, $excluded_categories = '') {
1178 adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, false);
1179}
1180
1181/**
1182 * Display adjacent post link.
1183 *
1184 * Can be either next post link or previous.
1185 *
1186 * @since 2.5.0
1187 *
1188 * @param string $format Link anchor format.
1189 * @param string $link Link permalink format.
1190 * @param bool $in_same_cat Optional. Whether link should be in same category.
1191 * @param string $excluded_categories Optional. Excluded categories IDs.
1192 * @param bool $previous Optional, default is true. Whether display link to previous post.
1193 */
1194function adjacent_post_link($format, $link, $in_same_cat = false, $excluded_categories = '', $previous = true) {
1195 if ( $previous && is_attachment() )
1196 $post = & get_post($GLOBALS['post']->post_parent);
1197 else
1198 $post = get_adjacent_post($in_same_cat, $excluded_categories, $previous);
1199
1200 if ( !$post )
1201 return;
1202
1203 $title = $post->post_title;
1204
1205 if ( empty($post->post_title) )
1206 $title = $previous ? __('Previous Post') : __('Next Post');
1207
1208 $title = apply_filters('the_title', $title, $post);
1209 $date = mysql2date(get_option('date_format'), $post->post_date);
1210
1211 $string = '<a href="'.get_permalink($post).'">';
1212 $link = str_replace('%title', $title, $link);
1213 $link = str_replace('%date', $date, $link);
1214 $link = $string . $link . '</a>';
1215
1216 $format = str_replace('%link', $link, $format);
1217
1218 $adjacent = $previous ? 'previous' : 'next';
1219 echo apply_filters( "{$adjacent}_post_link", $format, $link );
1220}
1221
1222/**
1223 * Retrieve get links for page numbers.
1224 *
1225 * @since 1.5.0
1226 *
1227 * @param int $pagenum Optional. Page ID.
1228 * @return string
1229 */
1230function get_pagenum_link($pagenum = 1) {
1231 global $wp_rewrite;
1232
1233 $pagenum = (int) $pagenum;
1234
1235 $request = remove_query_arg( 'paged' );
1236
1237 $home_root = parse_url(get_option('home'));
1238 $home_root = ( isset($home_root['path']) ) ? $home_root['path'] : '';
1239 $home_root = preg_quote( trailingslashit( $home_root ), '|' );
1240
1241 $request = preg_replace('|^'. $home_root . '|', '', $request);
1242 $request = preg_replace('|^/+|', '', $request);
1243
1244 if ( !$wp_rewrite->using_permalinks() || is_admin() ) {
1245 $base = trailingslashit( get_bloginfo( 'home' ) );
1246
1247 if ( $pagenum > 1 ) {
1248 $result = add_query_arg( 'paged', $pagenum, $base . $request );
1249 } else {
1250 $result = $base . $request;
1251 }
1252 } else {
1253 $qs_regex = '|\?.*?$|';
1254 preg_match( $qs_regex, $request, $qs_match );
1255
1256 if ( !empty( $qs_match[0] ) ) {
1257 $query_string = $qs_match[0];
1258 $request = preg_replace( $qs_regex, '', $request );
1259 } else {
1260 $query_string = '';
1261 }
1262
1263 $request = preg_replace( '|page/\d+/?$|', '', $request);
1264 $request = preg_replace( '|^index\.php|', '', $request);
1265 $request = ltrim($request, '/');
1266
1267 $base = trailingslashit( get_bloginfo( 'url' ) );
1268
1269 if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' != $request ) )
1270 $base .= 'index.php/';
1271
1272 if ( $pagenum > 1 ) {
1273 $request = ( ( !empty( $request ) ) ? trailingslashit( $request ) : $request ) . user_trailingslashit( 'page/' . $pagenum, 'paged' );
1274 }
1275
1276 $result = $base . $request . $query_string;
1277 }
1278
1279 $result = apply_filters('get_pagenum_link', $result);
1280
1281 return $result;
1282}
1283
1284/**
1285 * Retrieve next posts pages link.
1286 *
1287 * Backported from 2.1.3 to 2.0.10.
1288 *
1289 * @since 2.0.10
1290 *
1291 * @param int $max_page Optional. Max pages.
1292 * @return string
1293 */
1294function get_next_posts_page_link($max_page = 0) {
1295 global $paged;
1296
1297 if ( !is_single() ) {
1298 if ( !$paged )
1299 $paged = 1;
1300 $nextpage = intval($paged) + 1;
1301 if ( !$max_page || $max_page >= $nextpage )
1302 return get_pagenum_link($nextpage);
1303 }
1304}
1305
1306/**
1307 * Display or return the next posts pages link.
1308 *
1309 * @since 0.71
1310 *
1311 * @param int $max_page Optional. Max pages.
1312 * @param boolean $echo Optional. Echo or return;
1313 */
1314function next_posts( $max_page = 0, $echo = true ) {
1315 $output = esc_url( get_next_posts_page_link( $max_page ) );
1316
1317 if ( $echo )
1318 echo $output;
1319 else
1320 return $output;
1321}
1322
1323/**
1324 * Return the next posts pages link.
1325 *
1326 * @since 2.7.0
1327 *
1328 * @param string $label Content for link text.
1329 * @param int $max_page Optional. Max pages.
1330 * @return string|null
1331 */
1332function get_next_posts_link( $label = 'Next Page &raquo;', $max_page = 0 ) {
1333 global $paged, $wp_query;
1334
1335 if ( !$max_page ) {
1336 $max_page = $wp_query->max_num_pages;
1337 }
1338
1339 if ( !$paged )
1340 $paged = 1;
1341
1342 $nextpage = intval($paged) + 1;
1343
1344 if ( !is_single() && ( empty($paged) || $nextpage <= $max_page) ) {
1345 $attr = apply_filters( 'next_posts_link_attributes', '' );
1346 return '<a href="' . next_posts( $max_page, false ) . "\" $attr>". preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
1347 }
1348}
1349
1350/**
1351 * Display the next posts pages link.
1352 *
1353 * @since 0.71
1354 * @uses get_next_posts_link()
1355 *
1356 * @param string $label Content for link text.
1357 * @param int $max_page Optional. Max pages.
1358 */
1359function next_posts_link( $label = 'Next Page &raquo;', $max_page = 0 ) {
1360 echo get_next_posts_link( $label, $max_page );
1361}
1362
1363/**
1364 * Retrieve previous post pages link.
1365 *
1366 * Will only return string, if not on a single page or post.
1367 *
1368 * Backported to 2.0.10 from 2.1.3.
1369 *
1370 * @since 2.0.10
1371 *
1372 * @return string|null
1373 */
1374function get_previous_posts_page_link() {
1375 global $paged;
1376
1377 if ( !is_single() ) {
1378 $nextpage = intval($paged) - 1;
1379 if ( $nextpage < 1 )
1380 $nextpage = 1;
1381 return get_pagenum_link($nextpage);
1382 }
1383}
1384
1385/**
1386 * Display or return the previous posts pages link.
1387 *
1388 * @since 0.71
1389 *
1390 * @param boolean $echo Optional. Echo or return;
1391 */
1392function previous_posts( $echo = true ) {
1393 $output = esc_url( get_previous_posts_page_link() );
1394
1395 if ( $echo )
1396 echo $output;
1397 else
1398 return $output;
1399}
1400
1401/**
1402 * Return the previous posts pages link.
1403 *
1404 * @since 2.7.0
1405 *
1406 * @param string $label Optional. Previous page link text.
1407 * @return string|null
1408 */
1409function get_previous_posts_link( $label = '&laquo; Previous Page' ) {
1410 global $paged;
1411
1412 if ( !is_single() && $paged > 1 ) {
1413 $attr = apply_filters( 'previous_posts_link_attributes', '' );
1414 return '<a href="' . previous_posts( false ) . "\" $attr>". preg_replace( '/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label ) .'</a>';
1415 }
1416}
1417
1418/**
1419 * Display the previous posts page link.
1420 *
1421 * @since 0.71
1422 * @uses get_previous_posts_link()
1423 *
1424 * @param string $label Optional. Previous page link text.
1425 */
1426function previous_posts_link( $label = '&laquo; Previous Page' ) {
1427 echo get_previous_posts_link( $label );
1428}
1429
1430/**
1431 * Return post pages link navigation for previous and next pages.
1432 *
1433 * @since 2.8
1434 *
1435 * @param string|array $args Optional args.
1436 * @return string The posts link navigation.
1437 */
1438function get_posts_nav_link( $args = array() ) {
1439 global $wp_query;
1440
1441 $return = '';
1442
1443 if ( !is_singular() ) {
1444 $defaults = array(
1445 'sep' => ' &#8212; ',
1446 'prelabel' => __('&laquo; Previous Page'),
1447 'nxtlabel' => __('Next Page &raquo;'),
1448 );
1449 $args = wp_parse_args( $args, $defaults );
1450
1451 $max_num_pages = $wp_query->max_num_pages;
1452 $paged = get_query_var('paged');
1453
1454 //only have sep if there's both prev and next results
1455 if ($paged < 2 || $paged >= $max_num_pages) {
1456 $args['sep'] = '';
1457 }
1458
1459 if ( $max_num_pages > 1 ) {
1460 $return = get_previous_posts_link($args['prelabel']);
1461 $return .= preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $args['sep']);
1462 $return .= get_next_posts_link($args['nxtlabel']);
1463 }
1464 }
1465 return $return;
1466
1467}
1468
1469/**
1470 * Display post pages link navigation for previous and next pages.
1471 *
1472 * @since 0.71
1473 *
1474 * @param string $sep Optional. Separator for posts navigation links.
1475 * @param string $prelabel Optional. Label for previous pages.
1476 * @param string $nxtlabel Optional Label for next pages.
1477 */
1478function posts_nav_link( $sep = '', $prelabel = '', $nxtlabel = '' ) {
1479 $args = array_filter( compact('sep', 'prelabel', 'nxtlabel') );
1480 echo get_posts_nav_link($args);
1481}
1482
1483/**
1484 * Retrieve page numbers links.
1485 *
1486 * @since 2.7.0
1487 *
1488 * @param int $pagenum Optional. Page number.
1489 * @return string
1490 */
1491function get_comments_pagenum_link( $pagenum = 1, $max_page = 0 ) {
1492 global $post, $wp_rewrite;
1493
1494 $pagenum = (int) $pagenum;
1495
1496 $result = get_permalink( $post->ID );
1497
1498 if ( 'newest' == get_option('default_comments_page') ) {
1499 if ( $pagenum != $max_page ) {
1500 if ( $wp_rewrite->using_permalinks() )
1501 $result = user_trailingslashit( trailingslashit($result) . 'comment-page-' . $pagenum, 'commentpaged');
1502 else
1503 $result = add_query_arg( 'cpage', $pagenum, $result );
1504 }
1505 } elseif ( $pagenum > 1 ) {
1506 if ( $wp_rewrite->using_permalinks() )
1507 $result = user_trailingslashit( trailingslashit($result) . 'comment-page-' . $pagenum, 'commentpaged');
1508 else
1509 $result = add_query_arg( 'cpage', $pagenum, $result );
1510 }
1511
1512 $result .= '#comments';
1513
1514 $result = apply_filters('get_comments_pagenum_link', $result);
1515
1516 return $result;
1517}
1518
1519/**
1520 * Return the link to next comments pages.
1521 *
1522 * @since 2.7.1
1523 *
1524 * @param string $label Optional. Label for link text.
1525 * @param int $max_page Optional. Max page.
1526 * @return string|null
1527 */
1528function get_next_comments_link( $label = '', $max_page = 0 ) {
1529 global $wp_query;
1530
1531 if ( !is_singular() || !get_option('page_comments') )
1532 return;
1533
1534 $page = get_query_var('cpage');
1535
1536 $nextpage = intval($page) + 1;
1537
1538 if ( empty($max_page) )
1539 $max_page = $wp_query->max_num_comment_pages;
1540
1541 if ( empty($max_page) )
1542 $max_page = get_comment_pages_count();
1543
1544 if ( $nextpage > $max_page )
1545 return;
1546
1547 if ( empty($label) )
1548 $label = __('Newer Comments &raquo;');
1549
1550 return '<a href="' . esc_url( get_comments_pagenum_link( $nextpage, $max_page ) ) . '" ' . apply_filters( 'next_comments_link_attributes', '' ) . '>'. preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
1551}
1552
1553/**
1554 * Display the link to next comments pages.
1555 *
1556 * @since 2.7.0
1557 *
1558 * @param string $label Optional. Label for link text.
1559 * @param int $max_page Optional. Max page.
1560 */
1561function next_comments_link( $label = '', $max_page = 0 ) {
1562 echo get_next_comments_link( $label, $max_page );
1563}
1564
1565/**
1566 * Return the previous comments page link.
1567 *
1568 * @since 2.7.1
1569 *
1570 * @param string $label Optional. Label for comments link text.
1571 * @return string|null
1572 */
1573function get_previous_comments_link( $label = '' ) {
1574 if ( !is_singular() || !get_option('page_comments') )
1575 return;
1576
1577 $page = get_query_var('cpage');
1578
1579 if ( intval($page) <= 1 )
1580 return;
1581
1582 $prevpage = intval($page) - 1;
1583
1584 if ( empty($label) )
1585 $label = __('&laquo; Older Comments');
1586
1587 return '<a href="' . esc_url( get_comments_pagenum_link( $prevpage ) ) . '" ' . apply_filters( 'previous_comments_link_attributes', '' ) . '>' . preg_replace('/&([^#])(?![a-z]{1,8};)/', '&#038;$1', $label) .'</a>';
1588}
1589
1590/**
1591 * Display the previous comments page link.
1592 *
1593 * @since 2.7.0
1594 *
1595 * @param string $label Optional. Label for comments link text.
1596 */
1597function previous_comments_link( $label = '' ) {
1598 echo get_previous_comments_link( $label );
1599}
1600
1601/**
1602 * Create pagination links for the comments on the current post.
1603 *
1604 * @see paginate_links()
1605 * @since 2.7.0
1606 *
1607 * @param string|array $args Optional args. See paginate_links.
1608 * @return string Markup for pagination links.
1609*/
1610function paginate_comments_links($args = array()) {
1611 global $wp_query, $wp_rewrite;
1612
1613 if ( !is_singular() || !get_option('page_comments') )
1614 return;
1615
1616 $page = get_query_var('cpage');
1617 if ( !$page )
1618 $page = 1;
1619 $max_page = get_comment_pages_count();
1620 $defaults = array(
1621 'base' => add_query_arg( 'cpage', '%#%' ),
1622 'format' => '',
1623 'total' => $max_page,
1624 'current' => $page,
1625 'echo' => true,
1626 'add_fragment' => '#comments'
1627 );
1628 if ( $wp_rewrite->using_permalinks() )
1629 $defaults['base'] = user_trailingslashit(trailingslashit(get_permalink()) . 'comment-page-%#%', 'commentpaged');
1630
1631 $args = wp_parse_args( $args, $defaults );
1632 $page_links = paginate_links( $args );
1633
1634 if ( $args['echo'] )
1635 echo $page_links;
1636 else
1637 return $page_links;
1638}
1639
1640/**
1641 * Retrieve shortcut link.
1642 *
1643 * Use this in 'a' element 'href' attribute.
1644 *
1645 * @since 2.6.0
1646 *
1647 * @return string
1648 */
1649function get_shortcut_link() {
1650 $link = "javascript:
1651 var d=document,
1652 w=window,
1653 e=w.getSelection,
1654 k=d.getSelection,
1655 x=d.selection,
1656 s=(e?e():(k)?k():(x?x.createRange().text:0)),
1657 f='" . admin_url('press-this.php') . "',
1658 l=d.location,
1659 e=encodeURIComponent,
1660 g=f+'?u='+e(l.href)+'&t='+e(d.title)+'&s='+e(s)+'&v=2';
1661 function a(){
1662 if(!w.open(g,'t','toolbar=0,resizable=0,scrollbars=1,status=1,width=720,height=570')){
1663 l.href=g;
1664 }
1665 }";
1666 if (strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') !== false)
1667 $link .= 'setTimeout(a,0);';
1668 else
1669 $link .= 'a();';
1670
1671 $link .= "void(0);";
1672
1673 $link = str_replace(array("\r", "\n", "\t"), '', $link);
1674
1675 return apply_filters('shortcut_link', $link);
1676}
1677
1678/**
1679 * Retrieve the site url.
1680 *
1681 * Returns the 'site_url' option with the appropriate protocol, 'https' if
1682 * is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
1683 * overridden.
1684 *
1685 * @package WordPress
1686 * @since 2.6.0
1687 *
1688 * @param string $path Optional. Path relative to the site url.
1689 * @param string $scheme Optional. Scheme to give the site url context. Currently 'http','https', 'login', 'login_post', or 'admin'.
1690 * @return string Site url link with optional path appended.
1691*/
1692function site_url($path = '', $scheme = null) {
1693 // should the list of allowed schemes be maintained elsewhere?
1694 $orig_scheme = $scheme;
1695 if ( !in_array($scheme, array('http', 'https')) ) {
1696 if ( ( 'login_post' == $scheme || 'rpc' == $scheme ) && ( force_ssl_login() || force_ssl_admin() ) )
1697 $scheme = 'https';
1698 elseif ( ('login' == $scheme) && ( force_ssl_admin() ) )
1699 $scheme = 'https';
1700 elseif ( ('admin' == $scheme) && force_ssl_admin() )
1701 $scheme = 'https';
1702 else
1703 $scheme = ( is_ssl() ? 'https' : 'http' );
1704 }
1705
1706 $url = str_replace( 'http://', "{$scheme}://", get_option('siteurl') );
1707
1708 if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
1709 $url .= '/' . ltrim($path, '/');
1710
1711 return apply_filters('site_url', $url, $path, $orig_scheme);
1712}
1713
1714/**
1715 * Retrieve the url to the admin area.
1716 *
1717 * @package WordPress
1718 * @since 2.6.0
1719 *
1720 * @param string $path Optional path relative to the admin url
1721 * @return string Admin url link with optional path appended
1722*/
1723function admin_url($path = '') {
1724 $url = site_url('wp-admin/', 'admin');
1725
1726 if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
1727 $url .= ltrim($path, '/');
1728
1729 return apply_filters('admin_url', $url, $path);
1730}
1731
1732/**
1733 * Retrieve the url to the includes directory.
1734 *
1735 * @package WordPress
1736 * @since 2.6.0
1737 *
1738 * @param string $path Optional. Path relative to the includes url.
1739 * @return string Includes url link with optional path appended.
1740*/
1741function includes_url($path = '') {
1742 $url = site_url() . '/' . WPINC . '/';
1743
1744 if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
1745 $url .= ltrim($path, '/');
1746
1747 return apply_filters('includes_url', $url, $path);
1748}
1749
1750/**
1751 * Retrieve the url to the content directory.
1752 *
1753 * @package WordPress
1754 * @since 2.6.0
1755 *
1756 * @param string $path Optional. Path relative to the content url.
1757 * @return string Content url link with optional path appended.
1758*/
1759function content_url($path = '') {
1760 $scheme = ( is_ssl() ? 'https' : 'http' );
1761 $url = WP_CONTENT_URL;
1762 if ( 0 === strpos($url, 'http') ) {
1763 if ( is_ssl() )
1764 $url = str_replace( 'http://', "{$scheme}://", $url );
1765 }
1766
1767 if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
1768 $url .= '/' . ltrim($path, '/');
1769
1770 return apply_filters('content_url', $url, $path);
1771}
1772
1773/**
1774 * Retrieve the url to the plugins directory or to a specific file within that directory.
1775 * You can hardcode the plugin slug in $path or pass __FILE__ as a second argument to get the correct folder name.
1776 *
1777 * @package WordPress
1778 * @since 2.6.0
1779 *
1780 * @param string $path Optional. Path relative to the plugins url.
1781 * @param string $plugin Optional. The plugin file that you want to be relative to - i.e. pass in __FILE__
1782 * @return string Plugins url link with optional path appended.
1783*/
1784function plugins_url($path = '', $plugin = '') {
1785 $scheme = ( is_ssl() ? 'https' : 'http' );
1786
1787 if ( $plugin !== '' && preg_match('#^' . preg_quote(WPMU_PLUGIN_DIR . DIRECTORY_SEPARATOR, '#') . '#', $plugin) ) {
1788 $url = WPMU_PLUGIN_URL;
1789 } else {
1790 $url = WP_PLUGIN_URL;
1791 }
1792
1793 if ( 0 === strpos($url, 'http') ) {
1794 if ( is_ssl() )
1795 $url = str_replace( 'http://', "{$scheme}://", $url );
1796 }
1797
1798 if ( !empty($plugin) && is_string($plugin) ) {
1799 $folder = dirname(plugin_basename($plugin));
1800 if ('.' != $folder)
1801 $url .= '/' . ltrim($folder, '/');
1802 }
1803
1804 if ( !empty($path) && is_string($path) && strpos($path, '..') === false )
1805 $url .= '/' . ltrim($path, '/');
1806
1807 return apply_filters('plugins_url', $url, $path, $plugin);
1808}
1809
1810?>
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