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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 2 times in this file.
| Line | Code |
|---|---|
| 431 | |
| 432 | if ( !$post ) |
| 433 | return; |
| 434 | |
| 435 | $title = $post->post_title; |
| 436 | |
| 437 | if ( empty($post->post_title) ) |
| 438 | $title = __('Previous Post'); |
| 439 | |
| 440 | $title = apply_filters('the_title', $title, $post); |
| 441 | $string = '<a href="'.get_permalink($post->ID).'">'; |
| 442 | $link = str_replace('%title', $title, $link); |
| 443 | $link = $pre . $string . $link . '</a>'; |
| 444 | |
| 445 | $format = str_replace('%link', $link, $format); |
| 446 | |
| 447 | echo $format; |
| 448 | } |
| 449 | |
| Line | Code |
| 452 | |
| 453 | if ( !$post ) |
| 454 | return; |
| 455 | |
| 456 | $title = $post->post_title; |
| 457 | |
| 458 | if ( empty($post->post_title) ) |
| 459 | $title = __('Next Post'); |
| 460 | |
| 461 | $title = apply_filters('the_title', $title, $post); |
| 462 | $string = '<a href="'.get_permalink($post->ID).'">'; |
| 463 | $link = str_replace('%title', $title, $link); |
| 464 | $link = $string . $link . '</a>'; |
| 465 | $format = str_replace('%link', $link, $format); |
| 466 | |
| 467 | echo $format; |
| 468 | } |
| 469 | |
| 470 | function get_pagenum_link($pagenum = 1) { |