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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 |
|---|---|
| 649 | if ( is_multisite() ) { |
| 650 | $sign_up_url = network_site_url( 'wp-signup.php' ); |
| 651 | /** |
| 652 | * Filter the Multisite sign up URL. |
| 653 | * |
| 654 | * @since 3.0.0 |
| 655 | * |
| 656 | * @param string $sign_up_url The sign up URL. |
| 657 | */ |
| 658 | wp_redirect( apply_filters( 'wp_signup_location', $sign_up_url ) ); |
| 659 | exit; |
| 660 | } |
| 661 | |
| 662 | if ( !get_option('users_can_register') ) { |
| 663 | wp_redirect( site_url('wp-login.php?registration=disabled') ); |
| 664 | exit(); |
| 665 | } |
| 666 | |
| 667 | $user_login = ''; |