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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 |
|---|---|
| 3028 | } else { |
| 3029 | |
| 3030 | /** |
| 3031 | * Fires before a comment is posted. |
| 3032 | * |
| 3033 | * @since 2.8.0 |
| 3034 | * |
| 3035 | * @param int $comment_post_ID Post ID. |
| 3036 | */ |
| 3037 | do_action( 'pre_comment_on_post', $comment_post_ID ); |
| 3038 | |
| 3039 | } |
| 3040 | |
| 3041 | // If the user is logged in |
| 3042 | $user = wp_get_current_user(); |
| 3043 | if ( $user->exists() ) { |
| 3044 | if ( empty( $user->display_name ) ) { |
| 3045 | $user->display_name=$user->user_login; |
| 3046 | } |