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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 |
|---|---|
| 98 | <input name="thread_comments" type="checkbox" id="thread_comments" value="1" <?php checked( '1', get_option( 'thread_comments' ) ); ?> /> |
| 99 | <?php |
| 100 | /** |
| 101 | * Filters the maximum depth of threaded/nested comments. |
| 102 | * |
| 103 | * @since 2.7.0 |
| 104 | * |
| 105 | * @param int $max_depth The maximum depth of threaded comments. Default 10. |
| 106 | */ |
| 107 | $maxdeep = (int) apply_filters( 'thread_comments_depth_max', 10 ); |
| 108 | |
| 109 | $thread_comments_depth = '</label> <label for="thread_comments_depth"><select name="thread_comments_depth" id="thread_comments_depth">'; |
| 110 | for ( $i = 2; $i <= $maxdeep; $i++ ) { |
| 111 | $thread_comments_depth .= "<option value='" . esc_attr( $i ) . "'"; |
| 112 | if ( (int) get_option( 'thread_comments_depth' ) === $i ) { |
| 113 | $thread_comments_depth .= " selected='selected'"; |
| 114 | } |
| 115 | $thread_comments_depth .= ">$i</option>"; |
| 116 | } |