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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.
| Line | Code |
|---|---|
| 78 | <input name="thread_comments" type="checkbox" id="thread_comments" value="1" <?php checked('1', get_option('thread_comments')); ?> /> |
| 79 | <?php |
| 80 | /** |
| 81 | * Filter the maximum depth of threaded/nested comments. |
| 82 | * |
| 83 | * @since 2.7.0. |
| 84 | * |
| 85 | * @param int $max_depth The maximum depth of threaded comments. Default 10. |
| 86 | */ |
| 87 | $maxdeep = (int) apply_filters( 'thread_comments_depth_max', 10 ); |
| 88 | |
| 89 | $thread_comments_depth = '</label><label for="thread_comments_depth"><select name="thread_comments_depth" id="thread_comments_depth">'; |
| 90 | for ( $i = 2; $i <= $maxdeep; $i++ ) { |
| 91 | $thread_comments_depth .= "<option value='" . esc_attr($i) . "'"; |
| 92 | if ( get_option('thread_comments_depth') == $i ) $thread_comments_depth .= " selected='selected'"; |
| 93 | $thread_comments_depth .= ">$i</option>"; |
| 94 | } |
| 95 | $thread_comments_depth .= '</select>'; |
| 96 | |