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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 |
|---|---|
| 678 | case 'register' : |
| 679 | if ( is_multisite() ) { |
| 680 | /** |
| 681 | * Filters the Multisite sign up URL. |
| 682 | * |
| 683 | * @since 3.0.0 |
| 684 | * |
| 685 | * @param string $sign_up_url The sign up URL. |
| 686 | */ |
| 687 | wp_redirect( apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ) ); |
| 688 | exit; |
| 689 | } |
| 690 | |
| 691 | if ( !get_option('users_can_register') ) { |
| 692 | wp_redirect( site_url('wp-login.php?registration=disabled') ); |
| 693 | exit(); |
| 694 | } |
| 695 | |
| 696 | $user_login = ''; |