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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 4 times in this file.
| Line | Code |
|---|---|
| 264 | } |
| 265 | |
| 266 | function previous_post_link($format='« %link', $link='%title', $in_same_cat = false, $excluded_categories = '') { |
| 267 | $post = get_previous_post($in_same_cat, $excluded_categories); |
| 268 | |
| 269 | if(! $post) { |
| 270 | return; |
| 271 | } |
| 272 | |
| 273 | $title = apply_filters('the_title', $post->post_title, $post); |
| 274 | |
| 275 | $string = '<a href="'.get_permalink($post->ID).'">'; |
| 276 | |
| 277 | $link = str_replace('%title', $title, $link); |
| 278 | |
| 279 | $link = $string . $link . '</a>'; |
| 280 | |
| 281 | $format = str_replace('%link', $link, $format); |
| 282 | |
| Line | Code |
| 284 | } |
| 285 | |
| 286 | function next_post_link($format='%link »', $link='%title', $in_same_cat = false, $excluded_categories = '') { |
| 287 | $post = get_next_post($in_same_cat, $excluded_categories); |
| 288 | |
| 289 | if(! $post) { |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | $title = apply_filters('the_title', $post->post_title, $post); |
| 294 | |
| 295 | $string = '<a href="'.get_permalink($post->ID).'">'; |
| 296 | |
| 297 | $link = str_replace('%title', $title, $link); |
| 298 | |
| 299 | $link = $string . $link . '</a>'; |
| 300 | |
| 301 | $format = str_replace('%link', $link, $format); |
| 302 | |
| Line | Code |
| 313 | |
| 314 | $post = get_previous_post($in_same_cat, $excluded_categories); |
| 315 | |
| 316 | if(! $post) { |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | $string = '<a href="'.get_permalink($post->ID).'">'.$previous; |
| 321 | if ($title == 'yes') { |
| 322 | $string .= apply_filters('the_title', $post->post_title, $post); |
| 323 | } |
| 324 | $string .= '</a>'; |
| 325 | $format = str_replace('%', $string, $format); |
| 326 | echo $format; |
| 327 | } |
| 328 | |
| 329 | // Deprecated. Use next_post_link(). |
| 330 | function next_post($format='%', $next='next post: ', $title='yes', $in_same_cat='no', $limitnext=1, $excluded_categories='') { |
| 331 | |
| Line | Code |
| 336 | |
| 337 | $post = get_next_post($in_same_cat, $excluded_categories); |
| 338 | |
| 339 | if(! $post) { |
| 340 | return; |
| 341 | } |
| 342 | |
| 343 | $string = '<a href="'.get_permalink($post->ID).'">'.$next; |
| 344 | if ($title=='yes') { |
| 345 | $string .= apply_filters('the_title', $post->post_title, $nextpost); |
| 346 | } |
| 347 | $string .= '</a>'; |
| 348 | $format = str_replace('%', $string, $format); |
| 349 | echo $format; |
| 350 | } |
| 351 | |
| 352 | function get_pagenum_link($pagenum = 1) { |
| 353 | global $wp_rewrite; |
| 354 | |