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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 |
|---|---|
| 302 | /** |
| 303 | * Filters whether the users being deleted have additional content |
| 304 | * associated with them outside of the `post_author` and `link_owner` relationships. |
| 305 | * |
| 306 | * @since 5.2.0 |
| 307 | * |
| 308 | * @param bool $users_have_additional_content Whether the users have additional content. Default false. |
| 309 | * @param int[] $user_ids Array of IDs for users being deleted. |
| 310 | */ |
| 311 | $users_have_content = (bool) apply_filters( 'users_have_additional_content', false, $user_ids ); |
| 312 | |
| 313 | if ( $user_ids && ! $users_have_content ) { |
| 314 | if ( $wpdb->get_var( |
| 315 | "SELECT ID FROM {$wpdb->posts} |
| 316 | WHERE post_author IN( " . implode( ',', $user_ids ) . ' ) |
| 317 | LIMIT 1' |
| 318 | ) ) { |
| 319 | $users_have_content = true; |
| 320 | } elseif ( $wpdb->get_var( |