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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 |
|---|---|
| 770 | case 'register': |
| 771 | if ( is_multisite() ) { |
| 772 | /** |
| 773 | * Filters the Multisite sign up URL. |
| 774 | * |
| 775 | * @since 3.0.0 |
| 776 | * |
| 777 | * @param string $sign_up_url The sign up URL. |
| 778 | */ |
| 779 | wp_redirect( apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ) ); |
| 780 | exit; |
| 781 | } |
| 782 | |
| 783 | if ( ! get_option( 'users_can_register' ) ) { |
| 784 | wp_redirect( site_url( 'wp-login.php?registration=disabled' ) ); |
| 785 | exit(); |
| 786 | } |
| 787 | |
| 788 | $user_login = ''; |