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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 |
|---|---|
| 3240 | } else { |
| 3241 | |
| 3242 | /** |
| 3243 | * Fires before a comment is posted. |
| 3244 | * |
| 3245 | * @since 2.8.0 |
| 3246 | * |
| 3247 | * @param int $comment_post_ID Post ID. |
| 3248 | */ |
| 3249 | do_action( 'pre_comment_on_post', $comment_post_ID ); |
| 3250 | |
| 3251 | } |
| 3252 | |
| 3253 | // If the user is logged in |
| 3254 | $user = wp_get_current_user(); |
| 3255 | if ( $user->exists() ) { |
| 3256 | if ( empty( $user->display_name ) ) { |
| 3257 | $user->display_name = $user->user_login; |
| 3258 | } |