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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 |
|---|---|
| 941 | case 'register': |
| 942 | if ( is_multisite() ) { |
| 943 | /** |
| 944 | * Filters the Multisite sign up URL. |
| 945 | * |
| 946 | * @since 3.0.0 |
| 947 | * |
| 948 | * @param string $sign_up_url The sign up URL. |
| 949 | */ |
| 950 | wp_redirect( apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ) ); |
| 951 | exit; |
| 952 | } |
| 953 | |
| 954 | if ( ! get_option( 'users_can_register' ) ) { |
| 955 | wp_redirect( site_url( 'wp-login.php?registration=disabled' ) ); |
| 956 | exit; |
| 957 | } |
| 958 | |
| 959 | $user_login = ''; |