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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 |
|---|---|
| 522 | endif; |
| 523 | ?> |
| 524 | |
| 525 | <?php |
| 526 | /** |
| 527 | * Fires at the end of the Network Settings form, before the submit button. |
| 528 | * |
| 529 | * @since MU (3.0.0) |
| 530 | */ |
| 531 | do_action( 'wpmu_options' ); |
| 532 | ?> |
| 533 | <?php submit_button(); ?> |
| 534 | </form> |
| 535 | </div> |
| 536 | |
| 537 | <?php require_once ABSPATH . 'wp-admin/admin-footer.php'; ?> |
| 538 | |