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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 |
|---|---|
| 86 | $in_same_cat = true; |
| 87 | |
| 88 | $post = get_previous_post($in_same_cat, $excluded_categories); |
| 89 | |
| 90 | if ( !$post ) |
| 91 | return; |
| 92 | |
| 93 | $string = '<a href="'.get_permalink($post->ID).'">'.$previous; |
| 94 | if ( 'yes' == $title ) |
| 95 | $string .= apply_filters('the_title', $post->post_title, $post); |
| 96 | $string .= '</a>'; |
| 97 | $format = str_replace('%', $string, $format); |
| 98 | echo $format; |
| 99 | } |
| 100 | |
| 101 | // Use next_post_link(). |
| 102 | function next_post($format='%', $next='next post: ', $title='yes', $in_same_cat='no', $limitnext=1, $excluded_categories='') { |
| 103 | |
| 104 | if ( empty($in_same_cat) || 'no' == $in_same_cat ) |
| Line | Code |
| 107 | $in_same_cat = true; |
| 108 | |
| 109 | $post = get_next_post($in_same_cat, $excluded_categories); |
| 110 | |
| 111 | if ( !$post ) |
| 112 | return; |
| 113 | |
| 114 | $string = '<a href="'.get_permalink($post->ID).'">'.$next; |
| 115 | if ( 'yes' == $title ) |
| 116 | $string .= apply_filters('the_title', $post->post_title, $nextpost); |
| 117 | $string .= '</a>'; |
| 118 | $format = str_replace('%', $string, $format); |
| 119 | echo $format; |
| 120 | } |
| 121 | |
| 122 | // |
| 123 | // Use current_user_can() for these. |
| 124 | // |
| 125 | |