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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 |
|---|---|
| 537 | * Filters the HTML link to the Registration or Admin page. |
| 538 | * |
| 539 | * Users are sent to the admin page if logged-in, or the registration page |
| 540 | * if enabled and logged-out. |
| 541 | * |
| 542 | * @since 1.5.0 |
| 543 | * |
| 544 | * @param string $link The HTML code for the link to the Registration or Admin page. |
| 545 | */ |
| 546 | $link = apply_filters( 'register', $link ); |
| 547 | |
| 548 | if ( $echo ) { |
| 549 | echo $link; |
| 550 | } else { |
| 551 | return $link; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /** |